WO2015011255A1

WO2015011255A1 - Measuring instrument and measuring method for measuring mobile radios

Info

Publication number: WO2015011255A1
Application number: PCT/EP2014/066010
Authority: WO
Inventors: Gottfried Holzmann; Albert Moser; Thomas Lutz
Original assignee: Rohde & Schwarz Gmbh & Co. Kg
Priority date: 2013-07-25
Filing date: 2014-07-25
Publication date: 2015-01-29
Also published as: CN104769995B; DE102013214523A1; CN104769995A; DE102013214523B4

Abstract

A measuring instrument (1) is used for measuring mobile radios (21a, 21b). It has a transmission device (8) for producing N measurement signals and a reception device (9) for receiving N resulting signals. Furthermore, it has an interface device (16) having at least N ports (16a-16d) for connecting mobile radios (21a, 21b) that are to be measured. In addition, the measuring instrument (1) has a combination device (15) for connecting the transmission device (8) and the reception device (9) to the interface device (16). Furthermore, it has a calibration device (14) that is connected between the transmission device (8) and the combination device (15) and between the reception device (9) and the combination device (15). Said calibration device is designed to forward at least one measurement signal produced by the transmission device (8) to the reception device (9) and to measure the level of said measurement signal.

Description

Measuring device and measuring method for measuring

The invention relates to a measuring device and a measuring method for accurate and rapid measurement of mobile devices.

In order to measure mobile devices, conventionally, a measurement signal is generated and fed by means of a multiplexer successively several measuring terminals. By means of a further multiplexer resulting measured signals are successively fed to a receiver and

evaluated. For example, shows the European

Patent Application EP 2 605 027 A2 such a measuring device. The disadvantage of this is that when sequential

Loading of the measuring objects or input terminals of the measuring objects only a low measuring speed is achieved. In addition, the measuring devices shown there are disadvantageous because they only achieve a low accuracy of measurement.

The invention is therefore based on the object

To provide measuring device and a measuring method, which allow a fast and accurate measurement of mobile devices.

The object is achieved for the meter by the features of independent claim 1 and for the method by the features of independent claim 11. Advantageous developments are the subject of the dependent claims.

An inventive measuring device is used to measure mobile devices. It has a transmitting device for generating N measurement signals and a

Receiving device for receiving N resulting

Signals. Also it has one

Interface device with at least N terminals for connection to mobile devices to be measured. Furthermore, the meter has a

Merging device for connecting the

Transmitting device and the receiving device with the interface device. In addition, it has a calibration device, which between the

Transmitting device and the merging device and between the receiving device and the

Merging device is connected. The calibration device is preferably designed to be at least one generated by the transmitting device

Forward measuring signal to the receiving device and / or to measure its level. Thus, a fast and accurate measurement of the measurement objects can be achieved.

Preferably, the transmitting device has a

Signal generating means for generating a primary measurement signal and an amplifier for amplifying the primary measurement signal. In addition, the

Transmission device preferably via a signal divider for dividing the amplified primary measurement signal to N.

Signal paths and for each of the N signal paths via an adjustable attenuator for adjusting the levels of the resulting N measurement signals. So the N measurement signals can be very accurate in terms of their level

be set. This further increases the

Measuring accuracy. Advantageously, the calibration device has a feed device for feeding one of the N

Measuring signals to the receiving device. In addition, the measuring device is designed to close from the supplied one of the N measuring signals to the remaining N-1 measuring signals. Additionally or alternatively, the

Calibration device via a level measuring point for measuring a level of one of the N measuring signals. The measuring device is then designed to conclude from the measured level of the one measuring signal to the level of the remaining N-1 measuring signals. Thus, with very little hardware effort an accurate measurement can be achieved.

Alternatively, the calibration device has N

Feeding device for supplying the N measuring signals to the receiving device. Additionally or alternatively, the calibration device then has N

Level measuring points for measuring the levels of the N measuring signals. However, a particularly accurate measurement can be achieved at the expense of increased hardware complexity.

Preferably, the level measuring points or is the

Level measuring point temperature controlled. Thus, a further increase in the measurement accuracy can be achieved.

Preferably, the receiving device has a multiplexer for selecting an evaluation to be evaluated

Signals from the N signals, which are supplied to the receiving device. The receiving device has

additionally via a receiver for evaluating the

selected signal. Thus, an accurate measurement can be achieved with little hardware effort. Preferably, the meter has N first terminals and N second terminals for connecting N terminals of mobile devices. Furthermore, the measuring device preferably has a switching device for switching between a connection of the merging device with the N first terminals and a connection of the merging device with the N second terminals. So it is possible to take a measurement at the N first

Connections perform while the N second

Connections to be re-measured with mobile devices. After switching, the N first terminals can be re-populated while the N second terminals are being measured. This allows one

significant increase in the measuring speed.

Preferably, the switching device is designed such that either exactly the N first terminals or exactly the N second terminals with the

Merging device are interconnected.

An inventive method is used to measure mobile devices. N measurement signals are generated and supplied by means of at least N terminals to be measured mobile devices. Resulting N signals are received and evaluated. The generated measuring signals and the signals generated by the mobile devices to be measured are combined at the terminals. Before measuring the mobile devices while a calibration is performed, in which the generated measurement signals first

be returned and evaluated. Additionally or alternatively, the levels of at least one of the generated measurement signals are measured. The invention will be described by way of example with reference to the drawing, in which an advantageous embodiment of the invention is shown. In the

Show drawing:

Fig. 1 shows a first embodiment of the

inventive measuring device in a block diagram; Fig. 2 is a detail view of the first

Embodiment of the measuring device according to the invention in a block diagram;

Fig. 3 shows a second embodiment of the

inventive measuring device in one

Block diagram and

Fig. 4 shows an embodiment of the invention

Measuring method in a flow chart.

First, reference will be made to the structure and operation of various embodiments of the measuring device according to the invention with reference to FIGS. 1-3. Subsequently, the exact mode of operation of an embodiment of the measuring method according to the invention will be clarified with reference to FIG. 4. Identical elements have not been repeatedly shown and described in similar figures.

In Fig. 1 is a first embodiment of the

Measuring device 1 according to the invention shown. The measuring device 1 includes a transmitting device 8, which is connected to a calibrating device 14. This, in turn, is provided with a merging device 15 connected, which in turn with a

Interface device 16 with a plurality of

Terminals 16a, 16b, 16c and 16d is connected. Furthermore, the calibration device is connected to a

Receiving device 9. The transmitting device 8 includes a signal generating device 10, which

The amplifier 11 is connected to a signal divider 12 which is connected to a plurality of attenuators 13a, 13b, 13c and 13d. The attenuation devices 13a-13d are in each case with the calibration device 14

connected. The calibration device 14 includes in this embodiment a plurality of

Calibration elements 14a, 14b, 14c and 14d. Each of the

Calibration elements 14a-14d is with one of

Attenuators 13a-13d connected. On the exact structure of a calibration element 14a is discussed in more detail in Fig. 2. The merging device 15 has a plurality of combiners 15a, 15b, 15c and 15d. Each of the combiners 15a-15d is connected to a calibration element 14a-14d. Furthermore, each of the combiners 15a-15d is connected to one of the terminals 16a-16d. The entirety of the connections 16a-16d forms the interface device 16.

The receiving device 9 has a multiplexer 18, which is connected to all calibration elements 14a-14d. Furthermore, the multiplexer 18 is connected to a receiver 17.

The connections 16a-16d serve to connect the mobile devices 21a, 21b to be measured. In this one shown case are two to be measured

Mobile devices 21a, 21b connected by means of two terminals 16a, 16b and 16c, 16d with the meter 1.

Likewise, however, each individual connection 16a-16d can also have its own mobile device to be measured

be connected. Alternatively, all can

Ports 16a-16d for measuring a single

Mobile device are used. In order to carry out a measurement, the mobile devices 21a, 21b to be measured are first connected to the connections 16a-16d. The signal generating device 10 generates a primary measurement signal, which is generated by the

Amplifier 11 is amplified. The signal divider 12 divides it into N, in this case four, individual measurement signals, which are fed to the attenuators 13a-13d. These are adjustable. Thus, the levels of the individual measurement signals can be set very accurately.

The resulting measurement signals become the

Calibration elements 14a-14d of the calibration device 14 supplied. Optionally now a calibration

carried out. For this purpose, the calibration elements 14a-14d, the measurement signals directly to the multiplexer 18 of the

Receiving device 9 back. One after the other, the receiver 17 evaluates the feedback measurement signals. Additionally or alternatively, the levels of the measurement signals are measured by the calibration elements 14a-14d. A control device, not shown here, compares the measured levels with the desired levels of the measuring signals and adjusts the attenuators 13a-13d accordingly. In addition, on the basis of the 17 of the receiver measured signals, the correctness of the measurement signals

checked.

After the calibration is finished, switch the

Calibration elements 14a-14d, the measurement signals to the

Combiner 15a-15d of the merging device 15. The measurement signals are transmitted from these to the terminals 16a-16d and from these to the to be measured

Mobile devices 21a and 21b transmitted.

In return, the mobile devices 21a, 21b to be measured generate signals which are received by the terminals 16a-16d and the combiners 15a-15d of the

Merging device 15 are supplied. These signals are sent to the calibration elements 14a-14d of the

Calibration device 14 and transmitted from these to the multiplexer 18 of the receiving device. Successively, the signals are measured by the receiver 17 of the receiving device 9.

FIG. 2 shows a detailed view of a calibration element 14a-14d from FIG. 1. The calibration element 14a-14d has a first switch 30 and a second switch 31. The switches 30, 31 together form a supply device 39 for supplying the signal generated by the transmitting device 8 to

Receiving device 9. The first switch 30 is connected to one of the attenuation devices 13a-13d of FIG. Furthermore, the first switch 30 is connected to one of the combiners 15a-15d. In addition, the first switch 30 is connected to a signal divider 32, which in turn is connected to the second switch 31. The second switch 31 is also connected to the

Combiner 15a-15d, with which the first switch 30th connected, connected. In addition, the second switch 31 is connected to the multiplexer 18 of FIG.

The first switch 30 serves to switch the terminal, which is connected to the attenuator 13a-13d, between the signal divider 32 and the combiner 15a-15d. The second switch 31 serves to switch the connection to the multiplexer 18 between the signal divider 32 and the combiner 15a-15d. In addition, the calibration element 14a-14d includes a detector 33 and a temperature control device 34. The detector 33 is connected to the signal divider 32

connected. The temperature control device 34 is connected to the detector 33. An output signal of the detector is supplied to a control device, not shown. The signal splitter 32, the detector 33 and the temperature control device 34 together form a level measuring point 38. If a calibration is to be performed, the first switch 30 connects the attenuation device 13a-13d to the signal splitter 32. Furthermore, the second switch 31 connects the signal splitter 32 with the multiplexer 18. A generated by the transmitting device measuring signal is thus supplied via the first switch to the signal splitter 32 and the second switch 31 of the receiving device. In addition, a defined part of the measurement signal is diverted from the signal splitter 32 and fed to the detector 33. This determines the level of the measuring signal. The temperature control device 34 controls the temperature of the detector 33. This increases the measurement accuracy of the level detector 33. The measurement result of the detector 33 is supplied to the control device. If, on the other hand, a measurement of a mobile radio device is to be carried out, then the first switch 30 connects the transmitting device 8 to the merging device 15. The second switch 31 connects the

Merging device 15 with the receiving device 9.

In Fig. 3 is a second embodiment of the

Measuring device 1 according to the invention shown. In the following, only differences to the first embodiment shown in Fig. 1 are described. This one

illustrated measuring device 1 has a

Switching device 19, which with the

Merging device 15 is connected. Here are no connections directly with the

Merging device 15 connected. The

Switching device 19 includes a plurality of switches 19a, 19b, 19c and 19d, which are each connected to a combiner 15a-15d of the merging device. In addition, the measuring device 1 includes here an interface device 20, which a

Comprises a plurality of terminals 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h. There are two of each

Ports 20a-20h with one of the switches 19a-19d

connected. The terminals 20a-20h are divided into first terminals 20a, 20b, 20c and 20d and second terminals 20e, 20f, 20g and 20h. A first connection 20a-20d and a second connection 20e-20h are connected to a switch 19a-19d. The switches 19a-19d are formed to switch simultaneously between the first terminals 20a-20d and the second terminals 20e-20h. The purpose of the switching device 19 and the terminals 20a-20h is to increase the measuring speed of the measuring device 1. Thus, first mobile devices to be measured are connected to first ports 20a-20d and a measurement is started. While the measurement is in progress, second mobile devices to be measured are connected to the second ports 20e-20h. As soon as the measurement of the first mobile devices to be measured has been completed, the switching device 19 switches over to the second connections 20e-20h. A measurement of the second to be measured

Mobile devices are started. Meanwhile, the first terminals 20a-20d may be measured with third ones

Mobile devices are re-equipped. It is therefore not necessary to wait until the measurement is completed to equip the meter 1 with new mobile devices to be measured while no measurement is in progress. The

Standstill time, i. the time in the no measurement

can be performed so can be minimized. In Fig. 4 is an embodiment of the

inventive measuring method shown. In a first step 40 mobile devices to be measured are connected by means of N connections to a measuring device. In a second step 41, the measuring device N

Measurement signals generated. In a third step 42, the N measurement signals are measured by the measuring device. In a fourth step 43, the N measurement signals are the

Mobile devices or, if only one is connected to this supplied. In a fifth step 44, signals generated by the mobile radio devices are measured.

Optionally, in a sixth step 45, simultaneously with the implementation of the fourth and fifth steps 43, 44, second mobile devices are connected to N second connections connected. In an optional seventh step 46, between the first and second ports

switched. It is then proceeded to the fourth step 43. The N measurement signals will be the now

fed second connected mobile devices.

The invention is not limited to that shown

Embodiment limited. So mobile phones, but also other mobile radios can be measured. As already mentioned, those to be measured

Mobile devices are connected via a single connection or up to N ports. All features described above or features shown in the figures can be combined in any advantageous manner within the scope of the invention.

Claims

claims

1. Measuring device for measuring mobile devices (21a, 21b), with

- a transmitting device (8) for generating N

Measurement signals

- A receiving device (9) for receiving N

signals

- An interface means (16, 20) with at least N terminals (16a-16d, 20a-20h) for connection to

surveying mobile devices (21a, 21b), and

a merging device for connecting the transmitting device and the receiving device to the interface device;

characterized,

in that the measuring device (1) has a calibrating device (14) which is arranged between the transmitting device (8) and the merging device (15) and between the

Receiving device (8) and the

Merging device (15) is connected.

2. Measuring device according to claim 1,

characterized,

in that the calibration device (14) is designed to generate at least one of the transmission device (8)

Measuring signal directly to the receiving device (9)

forward and to measure its level.

3. Measuring device according to claim 1 or 2,

characterized,

that the transmitting device (8)

a signal generating device (10) for generating a primary measuring signal, - An amplifier (11) for amplifying the primary

Measuring signal,

a signal divider (12) for dividing the amplified primary measurement signal into N signal paths, and

- for each of the N signal paths, one adjustable

Attenuation means (13a-13d) for adjusting the levels of the resulting N measurement signals,

having .

4. Measuring device according to one of claims 1 to 3,

characterized,

in that the calibration device (14) has a

Feeding means (39) for feeding one of the N

Measuring signals to the receiving device (9) has, and that the measuring device (1) is adapted to from the

supplied to close one of the N measuring signals to the remaining N-1 measuring signals, and / or

in that the calibration device (14) has a

Level measuring point (38) for measuring a level of one of the N measuring signals, and

that the measuring device (1) is designed to be removed from the

measured level of the one measurement signal to close the levels of the remaining N-1 measurement signals.

5. Measuring device according to one of claims 1 to 4,

characterized,

the calibration device (14) is above N

Feeding means (39) for feeding the N

Has measuring signals to the receiving device (9), and / or

in that the calibrating device (14) has N level measuring points (38) for measuring the levels of the N measuring signals.

6. Measuring device according to claim 4 or 5, characterized,

the level measuring point (38) or level measuring points (38) are temperature-controlled.

7. Measuring device according to one of claims 1 to 6,

characterized,

in that the receiving device (9) has a multiplexer (18) for selecting a signal to be evaluated and a receiver (17) for evaluating the selected one

Signal has.

8. Measuring device according to one of claims 1 to 7,

characterized,

that the measuring device (1) via

N first terminals (20a-20d) and N second terminals (20e-20h) for connecting N terminals of

Mobile devices, and

a switch means (19) for switching between a connection of the merging means (15) with the N first terminals (20a-20d) and a connection of the merging means (15) with the N second terminals (20e-20h),

has.

9. Measuring device according to one of claims 1 to 8,

characterized,

the switching device (19) is designed in such a way that either exactly the N first connections (20a-20d) or exactly the N second connections (20e-20h) are connected to the merging device (15) at the same time.

10. Measuring device according to claim 8 or 9,

characterized, in that the measuring device (1) is designed such that, while the switching device (19) connects the N first terminals (20a-20d) to the merging device (15), and by means of the N first terminals (20a-20d) a measurement at N terminals first to be measured mobile devices is performed, the N second

Connections (20e-20h) with N connections second to

surveying mobile devices are connected to allow after switching the switching device (19) measuring the second mobile devices.

11. A method for measuring mobile devices (21a, 21b), comprising the following steps:

Generating N measurement signals,

Connecting mobile devices (21a, 21b) to be measured to at least N terminals (16a-16d, 20a-20h),

Reception of N signals,

characterized,

a calibration is carried out in which at least one generated signal is received directly.

12. The method according to claim 11,

characterized,

that a primary measurement signal is generated,

that the primary measurement signal is amplified,

that the amplified primary measurement signal is divided into N signal paths, and

that levels of the signals of each of the signal paths are adjusted.

13. The method according to claim 11 or 12,

characterized,

that for calibration one of the N measurement signals is received, and that from the received one of the N measurement signals is closed to the remaining N-1 measurement signals, and / or

in that a level of one of the N measuring signals is measured, and that the level of the remaining N-1 measuring signals is deduced from the measured level of the one measuring signal.

14. The method according to claim 11 or 13,

characterized,

that N measurement signals are received, and / or

that levels of the N measurement signals are measured.

15. The method according to claim 13 or 14,

characterized,

that the level measurement is carried out temperature-controlled.

16. The method according to any one of claims 11 to 15,

characterized,

that over N first terminals (20a-20d) a

Measurement is performed at N terminals of first mobile devices, N second terminals (20e-20h) are connected to N terminals of second mobile devices to be measured, and

that after switching over the first connections (20a-20d) and the second connections (20e-20h) via N connections, second mobile devices are measured.