TWI431955B - System for testing an embedded wireless transceiver - Google Patents

Description

System for testing embedded wireless transceivers (2) Patent application in related review

This application is a continuation-in-part of U.S. Patent Application Serial No. 11/279,778, filed on Apr. 14, 2006. The application also has a patent application filed on the same day, No. 11602.00.0027, filed by the inventor Christian Olgaard, entitled "System for Testing Embedded Wireless Transceivers".

Field of invention

The present disclosure relates to a wireless communication system having a host processor and a wireless transceiver embedded therein, and more specifically, product testing of such systems.

Background of the invention

As the number and use of wireless data communication systems increase, product testing of such wireless transceivers embedded in such systems is becoming more and more time-sensitive for such system manufacturers. important. It is well known that the problem with product testing of such embedded transceivers is that there is typically no direct connection between the device under test (DUT) and the test controller (eg, a personal computer), for example, a wired, digitally controlled connection is available. Instead, communication must be generated by embedding the host processor in the system. Therefore, product testing becomes more complicated as test firmware must be installed or stored to operate in the embedded host processor.

Used in an embedded host processor for a single platform Firmware is acceptable, but when it comes to and must support multiple platforms, this approach becomes unsatisfactory immediately. Moreover, in general, the wireless transceiver function, for example, operates a wireless data transceiver in accordance with the IEEE 802.11 standard, which is only a small fraction of the overall functional combination of the host system. Thus, in an effort to create a fully functional wireless transceiver capability, manufacturers are still not keen on spending significant resources on integrating the wireless functionality in view of their limited role in the overall operation of the system. Therefore, what is expected is to provide a simpler and more efficient product testing method for such systems, with minimal changes required to perform product testing of various systems.

Summary of invention

In one embodiment, a test instrument for testing a wireless communication device includes a wireless transceiver and a controller. The wireless transceiver transmits a first sequence of packets when operating in a first mode. The wireless transceiver transmits a second sequence of packets when operating in a second mode. The wireless transceiver receives the response packet. The controller is configured to calculate the response packets received by the transceiver in response to transmitting each packet of the first sequence of packets. When the count exceeds a predetermined count, the controller controls the transceiver to transmit the second sequence of packets. The case also reveals a related method.

In one example, the transceiver operates at a first power level when operating in the first mode and at the second power level when operating in the second mode. In one example, the transceiver uses a first modulation technique in the first mode and a second modulation technique in the second mode. In one example, the transceiver transmits at a first data rate in the first mode and at a second data rate in the second mode.

In one example, the transceiver transmits a predetermined number of packets in response to transmitting the first sequence packet without receiving at least one of the response packets, and the controller increases the first power level.

In one example, the test instrument includes memory to store information. The information includes the first mode, the second mode, the total number of packets transmitted, the total number of acknowledgment packets of the packet type, and/or the total number of acknowledgment packets received. In one example, after a predetermined number of packets have been transmitted and a final response packet has been received, the controller transfers the information to an analysis system. In an example, the analysis system determines a sensitivity value and/or a packet error rate based on the information.

In one example, a wireless communication system located in a test environment includes the test instrument and a device under test (DUT). The DUT receives the first sequence packet and transmits the response packet after receiving each packet of the first sequence packet.

Simple illustration

Figure 1 is a functional block diagram of a wireless data communication system in a product test environment.

Figure 2 depicts a method for testing the wireless data communication system of Figure 1 in accordance with an embodiment of the presently claimed invention.

Figure 3 depicts a method for testing the wireless data communication system of Figure 1 in accordance with another embodiment of the presently claimed invention.

Figure 4 depicts an embodiment of the present invention in accordance with an embodiment of the present invention The test sequence of the signal transmission test of the wireless data communication system of Figure 1.

Figure 5 depicts a test sequence for performing a signal reception test of the wireless data communication system of Figure 1 in accordance with another embodiment of the presently claimed invention.

Figure 6 depicts a test sequence for performing a signal reception test of the wireless data communication system of Figure 1 in accordance with another embodiment of the presently claimed invention.

Figure 7 is a block diagram showing an exemplary function of a test instrument in accordance with the present disclosure.

Figure 8 is an exemplary timing diagram of the test instrument performing a Received Signal Strength Indication (RSSI) calibration test.

Figure 9 is a flow chart depicting exemplary steps that may be employed by the test instrument to perform the RSSI calibration test.

Figure 10 is a flow chart depicting exemplary steps that may be employed by the wireless communication device.

Figure 11 is a flow chart depicting exemplary steps that may be employed when the test instrument performs a sensitivity test.

Figure 12 is a flow chart depicting alternative exemplary steps that may be employed by the test instrument to perform the sensitivity test.

Figure 13 is an exemplary timing diagram of the test instrument performing a sensitivity test using varying transmit power and modulation type.

Figure 14 is a flow chart depicting exemplary steps that the test instrument may employ when performing a sensitivity test using varying transmit power and modulation type.

Figure 15 is a flow chart depicting alternative exemplary steps that may be employed by the test instrument to perform a sensitivity test using varying transmit power and modulation type.

Detailed description of the preferred embodiment

The description of the following examples is merely illustrative and is not intended to limit the invention, its application, or use. For the sake of clarity, the same reference numbers in the drawings are used to identify the same elements. The embodiments are described in sufficient detail to enable those skilled in the art to practice this disclosure, and it should be understood that other embodiments may be practiced without departing from the spirit or scope of the invention. Implementation.

As used herein, the term module, circuit, and/or device refers to a specific application integrated circuit (ASIC), an electronic circuit, a processor that executes one or more software or firmware programs (shared, exclusive, Or group) with memory, a combination of logic circuits, and/or other suitable means for providing the functionality described above. Although there is no explicit negative representation in this context, it should be understood that the individual circuit components described above may be single or multiple in number. For example, the terms "circuit" and "circuit group" may include a single component or a plurality of components, which may be active and/or passive components and may be coupled together or otherwise coupled together (eg, as one or more The integrated circuit chip) to provide the above functionality. Furthermore, the term "signal" can be referenced to one or more currents, one or more voltages, or a data signal. At least one of the phrases A, B, and C should be considered to represent a logical (A or B or C) using a non-exclusive logical OR. Furthermore, the present disclosure has utilized separate electronic circuit sets (preferably The context of an embodiment of one or more integrated circuit chips is illustrated, and the functionality of any portion of the circuit group can be based on the signal frequency or data rate to be processed, using one or more appropriate plans. The processor is instead executed.

Referring to FIG. 1, a wireless data communication system in a general product test environment includes a device under test (DUT) 100, a computer 150 for controlling the test, and a test instrument 160 (eg, including a vector signal generator). (VSG) and a Vector Signal Analyzer (VSA), the physical interconnection of all components as shown. The DUT 100 has a number of embedded subsystems including a host processor 110, memory 120 (eg, non-electrical memory), a wireless transceiver 130, and one or more peripheral devices 140, entities of all components The interconnection is as shown. The host processor 110 controls the memory 120, the wireless transceiver 130, and the peripheral device 140 via various different control interfaces 121, 111, 113. Typically, the memory 120 stores the program used by the DUT 100 as a firmware. The control computer 150 generally performs product testing of the DUT 100 through an external interface 151, such as a universal serial bus (USB), a serial peripheral interface (SPI), an RS-232 serial interface, and the like. The software, the control computer 150 also controls the test instrument 160 via another interface 161, such as USB, Universal Interface Bus (GPIB), Ethernet, and the like. The test instrument 160 communicates with the wireless transceiver 130 via an interface 101. The interface can be a wireless interface, but is typically a wired interface for product testing purposes.

In a typical transmitter test scenario, the control computer 150 transmits one or more commands to the host processor 110, which translates the commands into the absence. The line transceiver 130 corresponds to the command. Then, via the transmission of the test signal of the test interface 101, the control computer 150 retrieves the measurement results from the test instrument 160 (via its interface 161), and then solves the wireless transmission and reception at its planned output frequency and power. One of the devices 130 is appropriately delayed.

As presented in this example, the commands required by the wireless transceiver 130 must pass through and be translated by the host processor 110. The host processor 110 can be of many different types and can operate many different operating systems, and it is often quite difficult to provide the required software in the host processor 110 to properly translate the commands. In general, such software must be specifically written for each application, so integrating the wireless transceiver 130 into the DUT 100 for a system integrator is a relatively difficult procedure.

As explained in more detail below, the test method proposed in accordance with one of the present disclosures uses a predetermined test flow, or sequence, to provide a simplified product test to confirm the performance of the embedded wireless transceiver. If the wireless transceiver is pre-planned by the test procedure, minimal communication between the wireless transceiver and the host processor 110 is required during testing. The test flow can be uploaded to the transceiver 130 as part of the loading of the test firmware, or alternatively, for example, the data area can be predetermined in one of the test definitions and completed in one of the firmware portions. . Upon completion of loading the firmware to the transceiver 130, the device can be located in a test mode waiting for commands from the test instrument 160. This can be accomplished as part of the load firmware, or as a separate command issued by the host processor 110. As a result, the only interaction with the host processor 110 includes loading of the firmware, loading of the test flow (unless it is an integral part of the firmware), and possibly including The wireless transceiver 130 is placed in a command in a product operation test mode.

Referring to Figure 2, an example of the method can be depicted as shown. In the first step 202, the test firmware is generally transferred by the control computer 150 to the host processor 110. In the next step 204, the test firmware is transferred from the host processor 110 to the wireless transceiver 130 via the interface 111. It should be understood that the test firmware can be completed because the test firmware also includes the desired test flow, or sequence, as an integral part. Alternatively, the test flow data can be transferred from the computer 150 to the host processor 110 and then communicated to the wireless transceiver 130. As a further alternative, the desired test flow data may be a data table type previously stored in the memory 120, which may be retrieved via the interface 121 and transferred to the wireless by the host processor 110. Transceiver 130.

In a next step 206, the wireless transceiver 130 is set to a test mode of operation, i.e., the wireless transceiver 130 will now wait for one or more commands from the test instrument 160 (described in more detail below), for example, The command from the test instrument 160 is heard by a predetermined frequency. The setting of the wireless transceiver 130 of this type can be automatically initiated as part of the testable firmware that can be loaded in a test mode of operation, or can be initiated by the host processor 110 by issuing an appropriate command. In the next step 208, the test operation of the test instrument 160 can be initiated, for example, by transmitting an appropriate command as heard by the wireless transceiver 130 as described above. Alternatively, the wireless transceiver 130 can transmit a "ready" signal at a predetermined frequency, and then the test instrument 160 begins transmitting one or more test commands upon receipt. Preferably, the command combination is minimized, for example, only a command of the NEXT type, and thus only the receiver is required to wait for one A good data packet (for example, indicating a NEXT command), and thus does not require any operation of the Media Access Control (MAC) layer. The initial test command is then transmitted from the test instrument 160. The wireless transceiver 130 preferably transmits a response signal to indicate that the command has been received, after which the primary test command sequence from the test instrument 160 will begin. Control of the test instrument 160 is accomplished by the control computer 150 via the interface 161.

A subsequent step 210 can include loading an update of the test firmware of the wireless transceiver 130, and thus can be based on data received from the control computer 150 via the host processor 110 (eg, transceiver calibration data), or from The host processor 110 transports the data to the wireless transceiver 130 for storage in a data sheet of the memory 120 to modify various operational settings, parameters or conditions.

Referring to Figure 3, a test method in accordance with another embodiment of the presently claimed invention has a first step 302 of initiating a system test operation. This causes the host processor 110 to prepare for a next step 304 for the test firmware to be transferred from the memory 120 to the wireless transceiver 130 via the host processor 110. As described above, the test firmware may include the test flow, or may be composed of two components, that is, the test command and the test sequence data. In the next step 306, the wireless transceiver 130 is set to its test mode of operation. As described above, this may be done automatically as part of the loading of the test firmware, or may be initiated by the host processor 110 via the interface 111 by an appropriate command, which may be initiated by the host processor 110. Or by the host processor 110 to be shipped in response to receiving it from the computer 150.

In the next step 308, the actual test is initiated. As mentioned above, this can be The wireless transceiver 130 initiates communication with the test instrument 160 at the interface 101, or the test device 160 initiates communication with the wireless transceiver 130 via the interface 101 under the control of the computer 150.

The subsequent steps may include the test firmware update to modify one of the various test settings, parameters or conditions, step 310, as described above.

As described above, a test method in accordance with one of the present disclosure includes the step of placing the DUT 100 along with the external test instrument 160 in a test mode of operation. Next, there are two general types of testing: testing of the signal transmitting function of the wireless transceiver 130; testing of the signal receiving function with the wireless transceiver 130.

Referring to Fig. 4, an example of a transmission test sequence can be explained as follows. The test may begin with a wait for a command 420 from the receiver (RX) portion of the DUT 100. The test instrument 160 issues its command 410 (eg, a GOTO-NEXT command). After the command is received, the transmitter (TX) of the DUT 100 sends a response signal 440 to indicate that it is receiving and understanding the command. Next, the DUT 100 starts transmitting the data signal determined by the test flow. This is represented by signal transmission slots 460, 461, ... 463. The test flow will determine the number of packets transmitted, and the type of transmit packet contains the same signal, or multiple signals when a multi-packet is transmitted.

Upon receipt of the response signal 440, the test instrument 160 will wait for a particular time interval 430 for the transmitter to schedule its desired operation (e.g., frequency accuracy and power level). Next to the time interval 430, the test instrument 160 performs measurements 450, 451. Then, the measurements 450, 451 are completed, and the test instrument 160 or the controller computer 150 accesses the test instrument 160. After collecting the data, the collected data is analyzed and the next test sequence 470 is prepared. Similarly, after its signal transmission 463 is complete, the DUT 100 prepares the next portion of the test sequence by processing any desired operations 480.

After the test instrument 160 or computer 150 has completed processing 470 of the data, a next test command (eg, GOTO-NEXT) is issued. If the next test preparation program 480 has not been completed, the first 411 of the type of command may not be received by the DUT 100. If so, the test instrument 160 will not receive any response signals. Thus, the test instrument 160 continues to transmit its command 412, and then at some point in time, one of the commands 412 is received 421 by the DUT 100, and a response signal 445 is transmitted by the DUT 100. When the DUT 100 transmits a new test signal of a known number 465, 466...468, this is the beginning of a new test sequence, and the test instrument 160 will perform the desired measurements 455, 456, and then further analyze and prepare. Subsequent test 471.

It should be understood that although quite unique in a product testing environment, the testing instrument 160 may not be able to receive good data from the DUT 100. This generally indicates that the DUT 100 is defective, and it is expected to continue the failed test before discarding the DUT 100. In this type of situation, there are two possible actions. According to one of the processes, the test instrument 160 can transmit a different command (eg, a REPEAT command instead of a GOTO-NEXT command). This is only a simple implementation, and the DUT 100 can easily recognize the different commands. However, the test instrument 160 needs to load a new command or new data to generate a new signal, which will slow down the test. Alternatively, the test instrument 160 may not transmit another command, and the DUT 100 may interpret it to indicate that the measurement was unsuccessful, and the DUT 100 will proceed with the initial test.

As noted above, the transmit signals 461, ... 463 transmitted by the DUT 100 can be a single transmit signal or can be a set of multi-packet signals. The use of this type of multi-packet signal has the advantage that during calibration, only a small amount of communication or no communication is required between the test instrument 160 and the DUT 100, since a solution can usually be achieved by iterative methods, such as August 2005. U.S. Patent Application Serial No. 11/161,692, the entire disclosure of which is incorporated herein by reference in its entirety, the entire disclosure of the entire disclosure of the disclosure of reference.

Referring to Figure 5, the expected test flow for receiving signals can be explained as follows. The test procedure differs from the signal transmission test procedure in that it is intended to perform the test so that the DUT 100 does not need to analyze, if any, the data actually received from the test instrument 160, but only determines whether it has been received correctly. Packet. Thus, when changing from one receiving test to another, the test instrument 160 does not need to issue a test command (eg, a GOTO-NEXT command). Rather, it is preferred that the DUT 100 decides when to move to the next test. When the DUT has received a predetermined number of good signal packets, this can only be done by having the DUT 100 continue for the next test.

If the DUT 100 has received a good packet and transmits a response signal, the test instrument 160 can only calculate the number of good packets without requiring such calculations from the DUT 100, so no additional communication is required and only the test needs to be determined. As a result, because the test instrument 160 knows how many packets to transmit and can determine how many packets to receive by simply counting the number of response signals received from the DUT 100. The test instrument 160 includes a test instrument such as the VSA and VSG. This technique is quite correct because it is impossible to have a missing response signal, and the DUT The transmitter power of 100 is typically greater than the transmitter power of the VSG. Therefore, the VSA cannot miss a response signal packet, especially if the VSA is triggered by the back edge of the signal packet transmitted by the VSG. In addition, having the VSA receive the response packet provides an additional advantage in that the switching time of the transmit/receive switch of the DUT 100 is also tested.

Referring again to FIG. 5, the test instrument 160 transmits the test command 510. Assuming that the previous test is a launch test, the test command 510 instructs the DUT 100 to initiate the next test, which is a receive test. The DUT 100 receives the command 520, which causes the test firmware to energize the receive test 580. When the receiver section of the DUT 100 is ready, a response signal is transmitted 540, which indicates the receiver's reading. This becomes quite important compared to the conventional test method in which the packet is transmitted by the test instrument 160 until the receiver begins to receive the packet. By having the DUT 100 indicate its reading, the test instrument 160 only needs to energize its VSA to wait for receipt of the response signal from the DUT 100, after which the test instrument 160 is ready to receive the test 530.

When the test instrument 160 (e.g., the VSA) receives the response signal 540, the test instrument 160 knows that the DUT 100 is ready and begins signal transmission. Accordingly, the test instrument 160 (eg, the VSA) begins transmitting a predetermined number of signal packets 561, 562, 563, 564, 568, 569, each of which generates a corresponding response signal 571, 572, 573, 574, 578, 579. The test instrument 160 receives the response packets and increments its internal calculations for each of the received packets. Moreover, as described above, the transmit/receive switching operation of the DUT 100 can be analyzed by analyzing an interval 560 between a transmit test signal 563 and a receive response signal 573 (this method enables It is advantageous to use a response signal because such signals are already included in all standard or preset transceiver signal combinations, thus avoiding the need to add other unnecessary signals or functions).

In this example, no packet error is generated, so the DUT 100 has received the predetermined number of packets and moved to the next receive test 581. Similarly, the test instrument 160 knows that the DUT 100 has received all packets based on the number of received response signals and can also prepare the next receive test 531. When the DUT 100 is ready, a response signal 541 is transmitted to indicate such readings, and after receiving the response signal 551, the testing instrument 160 begins transmitting packets for use by the next test 561. In the event that the DUT 100 has not received a packet in a predetermined time interval, it may retransmit its response signal 541, for example, for the case where the DUT 100 becomes ready to be faster than the test instrument 160 in the next test.

Referring to Figure 6, if a packet error is encountered, the DUT 100 cannot receive all of the predetermined good packets. As shown, the test flow begins with the previous test being a launch test. The VSG of the test instrument 160 transmits the test command 610 to indicate the start of the new operation or the end of the previous operation. The DUT 100 receives the command 620 and prepares for self-energy for receiving the test 680. When it is ready, the DUT 100 transmits a response signal 640 that it is ready to receive. The response signal 650 is received by the test instrument 160, and when the test instrument 160 is ready, for example, when its internal setting 630 is completed, it begins transmitting the predetermined number of packets 661, 662, 663, 664, 668, 669. The DUT 100 is responsive to this condition to transmit a response signal 671, 673, 674, 678, 679 for each good packet received.

As shown, one of the packets 662 is not received by the DUT 100. Thus, the DUT 100 does not transmit a corresponding response packet, which is depicted by an empty receiving packet 690. Then, after the transmission sequence is completed, the test instrument 160 knows how many response packets it receives, and since the packet 690 is obviously missing, the test instrument 160 knows that the DUT 100 receiver continues the test process before the next test. Still continue to wait for at least one packet. Thus, the test instrument 160 will calculate the number 635 of additional packets to be received by the DUT 100 and begin transmitting the desired number of packets 691.

Following receipt of the missing packet, the DUT 100 transmits a response signal 692 and begins preparing for the next test operation 681. When it is ready, the DUT 100 transmits another response signal to the test instrument 160. In this example, the test instrument 160 is not ready when the DUT 100 is ready. Thus, the DUT 100 transmits its response signal 641, but since the test instrument 160 is not ready and does not respond, then the DUT 100 will transmit another response signal 642 after a predetermined time interval. The test instrument 160 is now ready and then receives the response signal 651 to begin transmitting more data packets 661. The DUT 100 should wait for the data packet by transmitting the corresponding response packet 671.

As noted above, the signals transmitted for testing purposes may be multi-packet signals in which it is expected that the DUT 100 will only respond to a particular type of data packet. For example, if the transmitter is not required to transmit more packets to make the receiver meet the number of packets required for the next test, transmitting different data packets at different power levels can perform the actual receiver sensitivity. Test (which does not expect to receive a specific packet).

Referring now to Figure 7, an exemplary functional side of the test instrument 160 is illustrated. Block diagram. The test instrument 160 includes a controller 702, a memory 704 (eg, non-electrical memory), a VSG 706, a VSA 708, and a wireless transceiver 710. The controller 702 is operatively coupled to the VSG 706, the VSA 708, the memory 704, the transceiver 710, and the computer 150. The VSG 706 and VSA 708 are operatively coupled to the transceiver 710. More specifically, the VSG 706 is operatively coupled to one of the transceivers 710, the transmitter 714, and the VSA 708 is operatively coupled to one of the transceivers 710, the receiver 716. The controller 702 includes a test module 218 that controls the testing of the DUT 100. For example, the test module 218 can perform a Received Signal Strength Indicator (RSSI) calibration test followed by a sensitivity test of the wireless transceiver 130.

During the RSSI calibration test, the test instrument 160 transmits one or more packets to the DUT 100 at a first power level. In response to the one or more packets, the DUT 100 transmits a power level indicator to the test instrument 160, and the controller 702 stores it in the memory 704. In some embodiments, the power level indicator indicates that the RSSI of the one or more packets is greater than a predetermined threshold or less than the predetermined threshold. In other embodiments, the power level indicator represents the RSSI of the one or more packets.

The test instrument 160 transmits one or more packets at a second power level. In some embodiments, the controller 702 periodically increases or decreases one of the transmit powers of the transceiver 710 until a predetermined test sequence has been completed. For example, when the controller 702 periodically reduces the transmit power, the second power level is less than the first power level. However, when the controller 702 periodically increases the transmit power, the second power level is greater than the first power level. In other embodiments, the second power level is based on the power level indicator. example For example, if the power level indicator indicates that the first power level is greater than the predetermined threshold, the second power level is less than the first power level. However, if the power level indicator indicates that the first power level is less than the predetermined threshold, the second power level is greater than the first power level. In this method, the test instrument 160 searches for the DUT 100 to receive a calibration power level for one or more of the one or more packets.

In some embodiments, the test instrument 160 determines an RSSI calibration offset based on the first power level, the second power level, and/or the power level indicator used to calibrate the wireless transceiver 130. . In other embodiments, the test instrument 160 stores the first power level, the second power level, and/or the power level indicator in the memory 704, and then transfers it to, for example, the computer 150. An analysis system for later analysis.

The test instrument 160 does not transmit one or more packets to perform the RSSI calibration test, but instead transmits a first predetermined sequence of packets (eg, a first predetermined sequence) to the first power level to the first power level. The DUT 100. The DUT 100 is configured to transmit a response packet to the test instrument 160 in response to each packet of the first packet sequence. After transmitting a predetermined number of response packets, the DUT 100 transmits the power level indicator. After receiving the power level indicator from the DUT 100, the test instrument 160 transmits a second predetermined sequence of packets (e.g., a second predetermined sequence) at the second power level. In this method, the test instrument 160 searches for the calibration power level required by the DUT 100 based on the predetermined sequence of packets (e.g., a predetermined sequence).

As noted above, in some embodiments, the power level indicator indicates the RSSI of the packets. In these embodiments, the test instrument 160 can be pre- The power level is fixed to transmit a single predetermined sequence of packets (e.g., a predetermined sequence) to the DUT 100. The DUT 100 is operative to transmit a response packet to the test instrument 160 in response to each packet of the predetermined sequence of packets. After transmitting a predetermined number of response packets, the DUT 100 transmits a power level indicator indicative of the RSSI of at least one of the predetermined sequence of packets. For example, the RSSI can be encoded in the power level indicator. Alternatively, the power level indicator can include a plurality of power level packets (not shown) that indicate the RSSI. For example, if the power level indicator includes 44 power level packets, the evaluated signal strength can be -60 dBm. Although 44 power level packets are used in this example to represent an estimated signal strength of -60 dBm, those skilled in the art will recognize that any number of power level packets can be used to indicate the signal strength of the evaluation.

Because the test instrument 160 desires to receive a total number of all packets (eg, all 60 packets) indicating a predetermined number of the RSSI, the power level indicator may also include an additional filler packet (not shown) that does not indicate the RSSI (not shown) ( For example, 16 packets) such that the same number of packets are included in each power level indicator. Once the test instrument 160 has received all of the predetermined number of all packets (eg, 44 power level packages and 16 packing packets), the test instrument 160 can complete the RSSI test and proceed to the sensitivity test.

During the sensitivity test, which is typically performed after the RSSI calibration test, the controller 702 sets the transmitter 714 to operate in at least one of the first and second modes. For example, in some embodiments, the transmitter 714 transmits at a first power level when operating in the first mode and at a second power level when operating in the second mode. In other embodiments, the transmitter 714 A first modulation technique is used for operation in the first mode and a second modulation technique is used for operation in the second mode. In still other embodiments, the transmitter 714 transmits at a first data rate when operating in the first mode and at a second data rate when operating in the second mode.

When the transceiver 710 is operating in the first mode, the controller 702 controls the transceiver 710 to transmit a sequence of packets separated by a time interval to the DUT 100. The DUT 100 is configured to transmit a response packet to the test instrument 160 in response to receiving each packet of the packet sequence. The controller 702 is configured to calculate a response packet received by the transceiver 710 in response to transmitting each packet of the packet sequence.

When the number of the response packets exceeds a predetermined count, the controller 702 sets the transceiver 710 to operate in the second mode and then controls the transceiver 710 to transmit a second sequence of packets. In some embodiments, the test instrument 160 determines a packet error rate (PER) based on how many packets are transmitted and how many response packets are received from the DUT 100. In other embodiments, the number of transmit and reply packets is stored in memory 704, which is then transferred to an analysis system such as computer 150 for later analysis.

The controller 702 can periodically reduce the power transmission level of the transceiver 710 until the DUT 100 stops transmitting the response packet in response to transmitting the packet sequence. Alternatively, the controller 702 can periodically increase the power level of the transceiver 710 until the DUT 100 begins transmitting a response packet in response to the sequence of packets.

In some embodiments, the test instrument 160 is responsive to the received response seals. The packet and the power level transmitted by the packets determine the sensitivity of one of the wireless transceivers 130. In other embodiments, the test instrument 160 stores the test results in memory 704 and then transfers to the computer 150 for later analysis.

Referring now to Figure 8, an exemplary timing diagram of the test instrument 160 performing the RSSI calibration test is generally depicted at 800. In this example, the RSSI calibration test includes four predetermined sequences that are generally identified by 802, 804, 806, and 808. While this example illustrates four predetermined sequences, those skilled in the art will recognize that more or fewer sequences are used. During the first sequence 802, the test instrument 160 transmits a first packet sequence 810, 812, and 814 to the DUT 100 during the time interval 816. Each packet 810, 812, and 814 are separated by a time interval. More specifically, packets 810 and 812 are separated by time interval 818, while packets 812 and 814 are separated by time interval 820. The DUT 100 is configured to individually transmit the response packets 822, 824, and 826 in response to receiving each of the first packet sequences 810, 812, and 814.

After the DUT 100 transmits a predetermined number of response packets (three in this example), the DUT 100 evaluates the signal strength of one of the first packet sequences 810, 812, and 814. The signal strength may be packetized according to one or more of the first packet sequences 810, 812, and 814. For example, the signal strength may be based on one of the first packet sequence 810, 812, 814, a high energy value, a low energy value, and/or an average energy value.

After evaluating the signal strength, the DUT 100 transmits a power level indicator 828 to the test instrument 160 based on the signal strength. In some embodiments, the power level indicator 828 indicates the evaluated letter of the first packet sequence The intensity of the number is greater than a predetermined threshold or less than the predetermined threshold. For example, when the estimated signal strength is greater than the predetermined threshold, the power level indicator may include a packet having a duration that is longer than when the estimated signal strength is less than the predetermined threshold, and vice versa .

The controller 702 is configured to adjust the power level of one of the transmitters 714 to a second power level in response to receiving the power level indicator 828. As noted above, in some embodiments, the controller 702 periodically reduces (or increases) the power level of each of the predetermined sequences 802, 804, 806, 808. In other embodiments, the power level is adjusted according to the power level indicator 828. For example, if the power level indicator 828 indicates that the signal strength of the first packet sequence 810, 812, 814 is greater than the predetermined threshold, the power level of the transmitter 150 may decrease.

During the second sequence 804, the test instrument 160 transmits a second packet sequence 830, 832, and 834 to the DUT 100. The second packet sequence 830, 832, 834 is transmitted at the second power level during the time interval 836. Packets 830 and 832 are separated by time interval 838. Packets 832 and 834 are separated by time interval 840. The DUT 100 is configured to individually transmit the response packets 842, 844, and 846 in response to receiving each of the second packet sequences 830, 832, and 834.

After the DUT 100 transmits a predetermined number of response packets (three in this example), the DUT 100 evaluates the signal strength of one of the second packet sequences 830, 832, 834. The DUT 100 transmits a power level indicator 848 to the test instrument 160 based on the signal strength. The controller 702 is configured to adjust the power level of the transmitter 714 to the power level indicator 848. A third power level. As noted above, in some embodiments, the controller 702 periodically reduces (or increases) the power level of each of the predetermined sequences 802, 804, 806, 808. In other embodiments, the power level is adjusted according to the power level indicator 848. For example, if the power level indicator 848 indicates that the signal strength of the second packet sequence 830, 832, 834 is less than the predetermined threshold, the power level of the transmitter 150 may decrease.

During the third sequence 806, the test instrument 160 transmits a third packet sequence 850, 852, and 854 to the DUT 100. The third packet sequence 850, 852, 854 is transmitted at the third power level during the time interval 856. Packets 850 and 852 are separated by time interval 858. Packets 852 and 854 are separated by time interval 860. The DUT 100 is operative to transmit the response packets 862, 864, and 866 in response to receiving each of the third packet sequences 850, 852, and 854.

After the DUT 100 transmits a predetermined number of response packets (three in this example), the DUT 100 evaluates the signal strength of one of the third packet sequences 850, 852, 854. The DUT 100 transmits a power level indicator 868 to the test instrument 160 based on the signal strength. The controller 702 is configured to adjust the power level of the transmitter 714 to a fourth power level in response to receiving the power level indicator 868.

During the fourth sequence 808, the test instrument 160 transmits a fourth packet sequence 870, 872, 874, and 876 to the DUT 100. The fourth packet sequence 870, 872, 874, 876 is transmitted at the fourth power level during time interval 878. Packets 870 and 872 are separated by time interval 880. Packets 872 and 874 are separated by time interval 882. Packets 874 and 876 are separated by time interval 884 open. The DUT 100 is operative to transmit the response packets 886, 888, and 890 individually in response to receiving three of the fourth packet sequences 870, 874, and 876. In this example, the DUT 100 does not receive the packet 872 and therefore does not transmit a response packet.

After the DUT 100 transmits a predetermined number of response packets (three in this example), the DUT 100 evaluates the signal strength of one of the fourth packet sequences 870, 874, 876. The DUT 100 transmits a power level indicator 892 to the test instrument 160 based on the signal strength. The test instrument 160 is configured to calculate an RSSI calibration offset in response to receiving the power level indicator 892, and based on the first to fourth power levels and/or the power level indicators 828, 848, 868, 892 to calibrate the wireless transceiver 130. Alternatively, the test instrument 160 stores the test results in the memory 704 and then transfers to an analysis system such as the computer 150 for later analysis.

Referring now to Figure 9, the exemplary steps that the controller 702 can employ during the RSSI calibration test are generally identified at 900. The process begins in step 902. In step 904, the test instrument 160 generates a predetermined sequence of packets to perform the RSSI calibration test. In step 906, the test instrument 160 transmits a single packet of the packet sequence. In step 908, the test instrument 160 determines whether to receive a response packet in response to transmitting the single packet. If a response packet is not received, the test instrument 160 transmits the packet again in step 906. If a response packet has been received in step 908, the test instrument 160 increments a response packet count in step 910.

In step 912, the test instrument 160 determines whether the response packet count is equal to the predetermined number of response packets. If the response packet count is not equal to the The program returns to step 906 if the number of predetermined answer packets is predetermined. However, if the response packet count is equal to the predetermined number of response packets, then the test instrument 160 receives a power level indicator in step 914.

In step 918, the test instrument 160 determines if the predetermined test flow requires another sequence of packets. If another packet sequence is required, the process returns to step 904 and the test instrument 160 generates another predetermined sequence of packets at a different power level. However, if the predetermined test procedure does not require another sequence, the program ends in step 920.

Referring now to Figure 10, exemplary steps that may be employed by the DUT 100 during the RSSI calibration test are generally identified at 1000. The program begins in step 1002. In step 1004, the DUT 100 listens to a packet transmitted from the test instrument 160. In step 1006, the DUT 100 determines if a packet from the test instrument 160 has been received. If a packet has not been received, the program returns to step 1004. However, if a packet has been received, then in step 1008 the DUT 100 transmits a response packet in response to the packet.

In step 1010, the DUT 100 increments a response packet count. In step 1012, the DUT 100 determines if the response packet count is equal to one of the predetermined number of packets per sequence. If the response packet count is not equal to the predetermined number of packets per sequence, then the process returns to step 1004. However, if the response packet count is equal to the predetermined number of packets per sequence, then in step 1014 the DUT 100 evaluates the signal strength of one of the sequence packets. As noted above, the signal strength can be based on a high energy value, a low energy value, and/or an average energy value for each of the packet sequences.

In step 1016, the DUT 100 transmits a power level indicator to indicate Whether the signal strength is greater than a predetermined threshold or less than the predetermined threshold. In step 1017, the DUT 100 determines if the predetermined test flow requires another sequence. If another sequence is needed, the program returns to step 1004. However, if the predetermined test procedure does not require another sequence, the process ends in step 1018.

Referring now to Figure 11, the exemplary steps that the test instrument 160 can employ during the sensitivity test are generally identified at 1100 and are typically performed after the RSSI calibration test. The program begins in step 1102. In step 1104, the test instrument 160 generates a predetermined sequence of packets to test the sensitivity of the wireless transceiver 130. In step 1106, the test instrument 160 transmits a single packet of the packet sequence.

In step 1108, the test instrument 160 is configured to determine whether a response packet has been received in response to transmitting the single packet. If a response packet has been received, the test instrument 160 increments a response packet count in step 1110 and proceeds to step 1112. However, if a response packet is not received, then the test instrument 160 proceeds only to step 1112. In step 1112, the test instrument 160 determines whether the response packet count is greater than or equal to the predetermined number of response packets.

If the response packet count is not greater than or equal to the predetermined number of response packets, then the process returns to step 1106. However, if the response packet count is greater than or equal to the predetermined number of response packets, then the test instrument 160 determines in step 1114 whether another power level needs to be tested to determine the sensitivity of the wireless transceiver 130. If another power level is required, the controller 702 adjusts the power level of the transmitter 714 in step 1116, and the program returns Step 1104. However, if no further power level is required, the process ends in step 1118.

The DUT 100 expects to receive a predetermined number and/or test packet sequence. Thus, the DUT 100 remains in the test mode until it receives the predetermined number and/or test packet sequence. In some cases, the power level of the transmitter 714 can be set relatively low for the DUT 100 to receive one or more packets from the test instrument 160. As a result, the DUT 100 can continue to operate in the test mode because it is unable to receive the predetermined number and/or test packet sequence, which effectively increases the duration of the test. Thus, an alternate exemplary step, generally identified at 1200, in FIG. 12, may be performed by the test instrument 160 to confirm that the DUT 100 receives the predetermined number and/or test packet sequence. The alternate procedure confirms that the DUT 100 receives sufficient packets and/or packet sequences to leave the test mode.

The program begins in step 1202. In step 1204, the test instrument 160 generates a predetermined sequence of packets to test the sensitivity of the wireless transceiver 130. In step 1206, the test instrument 160 transmits a single packet of the packet sequence.

In step 1208, the test instrument 160 is configured to determine whether a response packet has been received in response to transmitting the single packet. If a response packet has been received, the test instrument 160 increments a response packet count in step 1210 and proceeds to step 1212. However, if a response packet is not received, then the test instrument 160 proceeds only to step 1212. In step 1212, the test instrument 160 determines if the number of transmitted packets is equal to the predetermined packet required for the test in step 1212.

If the number of transmitted packets is equal to the predetermined packet required for the test, then the process returns to step 1206. However, if the response packet count is equal to the predetermined number of response packets, then the test instrument 160 determines in step 1214 whether another power level is required to test the sensitivity of the wireless transceiver 130. If another power level is required, the controller 702 adjusts the power level of the transmitter 714 in step 1216, and the process returns to step 1204. However, if another power level is not required, the controller 702 sets the power level of the transmitter 714 to a level at which the DUT 100 can receive a predetermined power level in step 1218. For example, if the power level is too low for the DUT 100 to receive a packet, the controller 702 can increase the power level of the transmitter 714 to the predetermined power level to confirm the DUT. 100 is capable of receiving one or more packets.

In step 1220, the test instrument 160 determines whether the response packet count is greater than or equal to the predetermined number of response packets. If the response packet count is greater than or equal to the predetermined number of response packets, then the process ends in step 1222. However, if the response packet count is not greater than or equal to the predetermined number of response packets, then the test instrument 160 transmits a packet in step 1224.

In step 1226, the test instrument 160 is configured to determine whether a response packet is received in response to transmitting the packet. If a response packet has been received, the test instrument 160 increments the response packet count in step 1228. However, if a response packet has not been received, the process returns to step 1224.

In some embodiments, the test instrument 160 can additionally perform PER testing at multiple data rates using multiple modulation techniques. Referring to Figure 13, the test instrument 160 performs a sensitivity using changing the transmit power and the modulation type. One of the test timing diagrams is generally depicted at 1300. This example shows a different IEEE 802.11 data packet tuned with this basic modulation technique. The packet 1302 is an OFDM modulation QAM64 packet. Packet 1304 is an OFDM modulated QAM16 packet. Packet 1306 is an OFDM modulated QPSK packet. Packet 1308 is an OFDM modulated BPSK packet. The packet 1310 is a QPSK modulated CCK packet. The packet 1312 is a BPSK modulated DSSS packet. As shown, each modulation technique forms a different power level.

Typically, in a test instrument that does not support segmented memory, a waveform of each packet type is individually loaded into the memory. However, a single waveform, such as typically recognized by 1300, can be loaded into memory to test all data rates. Therefore, it is advantageous to load a test instrument such as one that is generally recognized by 1300 in a segment that does not support segmented memory.

Referring now to Figure 14, the test instrument 160 uses a change modulation technique and/or data rate for each packet sequence of the waveform 1300 (e.g., for each packet sequence 1302, 1304, 1306, 1308, 1310, 1312). The exemplary steps that can be used to perform a sensitivity test are generally identified by 1400. The test starts at step 1402. In step 1404, the test instrument 160 transmits a first packet of the waveform 1300 (eg, one of the first packets of the packets 1302). In step 1406, the test instrument 160 determines whether a response packet is received in response to transmitting the first packet. If a response packet has been received, the test instrument 160 increments a response packet count (e.g., one of the packets 1302 to acknowledge the packet count) in step 1408 and proceeds to step 1410. However, if a response packet is not received, then the test instrument 160 proceeds only to step 1410.

In step 1410, the test instrument 160 determines whether the response packet count is greater than or equal to the predetermined number of response packets. If the response packet count is not greater than or equal to the predetermined number of response packets, then the test instrument 160 transmits the next packet of the waveform 1300 (eg, a second packet of the packet 1302) in step 1412 and the process returns to step 1406. . However, if the response packet count is equal to the predetermined number of response packets, then the test instrument 160 determines in step 1413 whether another packet sequence (e.g., packet 1304) is included in the waveform 1300.

If another packet sequence is included in the waveform 1300, the test instrument 160 transmits a first packet of the next packet sequence in the waveform 1300 (eg, one of the first packets of the packet 1304) in step 1404. However, if another packet sequence is not included in the waveform 1300 (eg, the program has duplicated packets 1302-1312), the process ends at step 1414. In some embodiments, when the program ends at step 1414, the test instrument 160 can reset an indicator to point to the first sequence of packets (eg, 1302) in the waveform 1300.

Referring now to Figure 15, an alternative exemplary step that the test instrument 160 can use to perform one of the sensitivity tests of the DUT 100 using the waveform 1300 is generally identified at 1500. The program begins in step 1502. In step 1504, the test instrument 160 transmits a first packet of the waveform 1300 (eg, one of the first packets of the packet 1302). In step 1506, the test instrument 160 determines whether a response packet is received in response to transmitting the first packet of the waveform 1300.

If a response packet has been received, the test instrument 160 adds a packet type response count in step 1508 (eg, a packet type response of the packet 1302). count). In step 1509, the test instrument 160 increments one of the complete waveforms 1300 for the response packet count and the process proceeds to step 1510. If a response packet is not received, the process proceeds only to step 1510. In step 1510, the test instrument 160 determines whether the number of transmitted packets is equal to the predetermined number of packets of the packet type (e.g., packet 1302). If the number of transmitted packets is not equal to the predetermined number of packets, then the test instrument 160 transmits the next packet of the waveform 1300 (eg, a second packet of the packet 1302) in step 1512 and the process returns to step 1506.

If the number of transmitted packets is equal to the predetermined number of packets, then in step 1511 the controller 702 determines if another packet sequence (e.g., packet 1304) is included in the waveform 1300. If another packet sequence is included in the waveform 1300, the process returns to step 1504. However, if another packet sequence is not included in the waveform 1300 (eg, the program has repeated cycles of the packets 1302-1312), the controller 702 sets the power level of the transmitter 714 to the The DUT 100 is capable of receiving one of the predetermined levels.

In step 1516, the test instrument 160 determines whether the response packet count is greater than or equal to the predetermined number of response packets of the complete waveform 1300. If the response packet count is greater than or equal to the predetermined number of response packets, the process ends in step 1518. If the response packet count is not greater than or equal to the predetermined number of response packets, then the test instrument 160 transmits a next packet of the waveform 1300 (eg, one of the packets of the packet 1302) in step 1520. In step 1522, the test instrument 160 determines whether a response packet is received in response to transmitting the packet. If a response packet has been received, the test instrument 160 increments the response packet count in step 1524. However, if one does not receive one If the packet is answered, the program returns to step 1520.

As noted above, in addition to these advantages, by pre-planning a wireless transceiver with a predetermined test flow, minimal communication between the wireless transceiver and the host processor is required during testing, if any. In addition, by providing an RSSI calibration test performed using the predetermined test flow, or sequence, to confirm the performance of the embedded wireless transceiver, the manufacturer can calibrate a wireless device with minimal changes required by the product. Those skilled in the industry will recognize other advantages.

It will be apparent to those skilled in the art that various modifications and changes can be made in the structure and method of the present invention without departing from the scope of the invention. Although the present invention has been described in connection with the preferred embodiments, it is understood that the claimed invention should not be The scope of the present invention is intended to be defined by the scope of the invention, and the structures and methods in the scope of the claims and their equivalents are also covered.

100‧‧‧Device under test

101, 111, 113, 121, 161‧‧ interface

110‧‧‧Host processor

120, 704‧‧‧ memory

130, 710‧‧‧ Wireless Transceiver

140‧‧‧ peripheral devices

150‧‧‧ computer

151‧‧‧ external interface

160‧‧‧Testing equipment

202, 204, 206, 208, 210, 302, 304, 306, 308, 310, 902, 904, 906, 908, 910, 912, 914, 918, 920, 1002, 1004, 1006, 1008, 1010, 1012 1014, 1016, 1017, 1018, 1102, 1104, 1106, 1108, 1110, 1112, 1114, 1116, 1118, 1202, 1204, 1206, 1208, 1210, 1212, 1214, 1216, 1218, 1220, 1222, 1224, 1226, 1228, 1402 1404, 1406, 1408, 1410, 1412, 1413, 1414, 1502, 1504, 1506, 1508, 1509, 1510, 1511, 1512, 1514, 1516, 1518, 1520, 1522, 1524 ‧ ‧ steps

218‧‧‧Test module

410, 411, 412, 420, 510, 520, 610, 620‧ ‧ orders

430, 560, 816, 818, 820, 836, 838, 840, 856, 858, 860, 878, 880, 882, 884 ‧ ‧ time interval

440, 445, 540, 541, 551, 571, 572, 573, 574, 578, 579, 640, 641, 642, 650, 651, 671, 673, 674, 678, 679, 692, 822, 824, 826, 842, 844, 846, 862, 864, 866, 886, 888, 890‧‧ ‧ response signals

450, 451, 455, 456 ‧ ‧ measurements

460, 461, ... 463‧‧ ‧ signal transmission slot

465, 466, ... 468‧‧ ‧ time

470, 471, 561, 681‧‧ test sequences

480‧‧‧ Preparation procedure

530, 531, 580, 581, 680‧‧‧ receiving test

561, 562, 563, 564, 568, 569, 661, 662, 663, 664, 668, 669, 810, 812, 814, 830, 832, 834, 850, 852, 854, 870, 872, 874, 876, 1302, 1304, 1306, 1308, 1310, 1312‧‧‧ signal packets

630‧‧‧Internal settings

635, 691‧‧ ‧ number of packets

661‧‧‧ data packet

690‧‧‧empty receiving packets

702‧‧‧ Controller

706‧‧‧VSG

708‧‧VSA

714‧‧‧transmitter

716‧‧‧ Receiver

718‧‧‧ test module

800‧‧‧ Timing diagram

802, 804, 806, 808‧‧ ‧ sequence

828, 848, 868, 892‧‧‧ power level indicator

900, 1000, 1100, 1200, 1400, 1500‧‧‧ demonstration steps

1300‧‧‧ waveform

Figure 1 is a functional block diagram of a wireless data communication system in a product test environment.

Figure 2 depicts a method for testing the wireless data communication system of Figure 1 in accordance with an embodiment of the presently claimed invention.

Figure 3 depicts a method for testing the wireless data communication system of Figure 1 in accordance with another embodiment of the presently claimed invention.

Figure 4 depicts a test sequence for performing the signal transmission test of the wireless data communication system of Figure 1 in accordance with an embodiment of the presently claimed invention. Column.

Figure 5 depicts a test sequence for performing a signal reception test of the wireless data communication system of Figure 1 in accordance with another embodiment of the presently claimed invention.

Figure 6 depicts a test sequence for performing a signal reception test of the wireless data communication system of Figure 1 in accordance with another embodiment of the presently claimed invention.

Figure 7 is a block diagram showing an exemplary function of a test instrument in accordance with the present disclosure.

Figure 8 is an exemplary timing diagram of the test instrument performing a Received Signal Strength Indication (RSSI) calibration test.

Figure 9 is a flow chart depicting exemplary steps that may be employed by the test instrument to perform the RSSI calibration test.

Figure 10 is a flow chart depicting exemplary steps that may be employed by the wireless communication device.

Figure 11 is a flow chart depicting exemplary steps that may be employed when the test instrument performs a sensitivity test.

Figure 12 is a flow chart depicting alternative exemplary steps that may be employed by the test instrument to perform the sensitivity test.

Figure 13 is an exemplary timing diagram of the test instrument performing a sensitivity test using varying transmit power and modulation type.

Figure 14 is a flow chart depicting exemplary steps that the test instrument may employ when performing a sensitivity test using varying transmit power and modulation type.

Figure 15 is a diagram depicting the use of the test instrument to change the transmit power and modulation A flow chart of alternative exemplary steps that may be employed when performing a sensitivity test.

100‧‧‧Device under test

101, 161‧‧ interface

150‧‧‧ computer

160‧‧‧Testing equipment

702‧‧‧ Controller

704‧‧‧ memory

706‧‧‧VSG

708‧‧VSA

710‧‧‧Wireless transceiver

714‧‧‧transmitter

716‧‧‧ Receiver

718‧‧‧ test module

Claims (17)

A test apparatus for testing a wireless communication device, comprising: a wireless transceiver operative to transmit a first sequence of packets when operating in a first mode and to emit a second when operating in a second mode a sequence packet, and a receive response packet; and a controller operative to control the transceiver to transmit the first sequence packet and to calculate the response received by the transceiver in response to transmitting each packet of the first sequence packet The packet, and when the count exceeds a predetermined count, is used to control the transceiver to transmit the second sequence of packets. The test apparatus of claim 1, wherein the transceiver operates at a first power level when operating in the first mode and at a second power level when operating in the second mode. The test apparatus of claim 2, wherein the controller is configured to transmit the first sequence packet in response to transmitting the first sequence packet by transmitting a predetermined number of packets but not receiving at least one of the response packets, the controller The power level is set to a predetermined power level. The test instrument of claim 1, wherein the transceiver uses a first modulation technique in the first mode and a second modulation technique in the second mode. The test apparatus of claim 1, wherein the transceiver transmits at a first data rate in the first mode and at a second data rate in the second mode. The test instrument of claim 1 further includes a memory for operating to store information, the information including the first mode, the second mode, At least one of the total number of transmitted packets, the total number of response packets of the packet type, and the total number of received waveform response packets. For example, in the test instrument of claim 6, wherein after a predetermined number of packets have been transmitted and a final response packet has been received, the controller operates to transfer the information to an analysis system. The test instrument of claim 7, wherein the analysis system is operative to determine at least one of a sensitivity value and a packet error rate based on the information. A wireless communication system in a test environment comprising the test instrument of claim 1 and further comprising a device under test (DUT), the DUT operating to receive the first sequence packet, and the first sequence packet Each of the packets is received and transmitted after the packets are received. A method for testing a wireless communication device, comprising the steps of: transmitting, in a first mode operation, transmitting a first sequence packet separated by a predetermined threshold; responsive to transmitting each of the first sequence packets And receiving a response packet; and calculating the received response packet; and the counting exceeds a predetermined count and transmitting a second sequence packet when operating in the second mode. The method of claim 10, further comprising transmitting at a first power level when operating in the first mode and transmitting at a second power level when operating in the second mode. The method of claim 11, further comprising setting the first power level in response to transmitting the first sequence of packets and transmitting a predetermined number of packets but not receiving at least one of the response packets It is a predetermined power level. The method of claim 10, further comprising transmitting in the first mode using a first modulation technique and transmitting in the second mode using a second modulation technique. The method of claim 10, further comprising transmitting at a first data rate when operating in the first mode and transmitting at a second data rate when operating in the second mode. The method of claim 10, further comprising storing at least the first mode, the second mode, the total number of packets transmitted, the total number of response packets of the packet type, and the total number of received waveform response packets. One of the information. For example, the method of claim 15 further includes transmitting a predetermined number of packets and receiving a final response packet, and transferring the information to an analysis system. The method of claim 15, further comprising determining at least one of a sensitivity value and a packet error rate based on the information.