CN108733853A - Novel tuner simulation actual measurement system - Google Patents

Abstract

The invention discloses a novel tuner simulation actual measurement system, which comprises a computer, a modulation unit, an up-conversion module unit, a transmitting antenna unit, a non-reflection isolation box, a product controller, a product to be measured and a demodulation unit, wherein the output end of the computer is respectively connected with the modulation unit, the product controller and the demodulation unit, the product controller controls the demodulation unit, the computer controls the modulation unit to generate a low-frequency modulation signal at an IF end, the low-frequency modulation signal generates a single or multi-channel radio frequency signal at RF 1-RFn ends through the up-conversion module unit, and the radio frequency signal radiates the signal through the transmitting antenna unit to enter the non-reflection isolation box. The invention is used for realizing the simulation and actual measurement of the tuner during the development and production periods, and can reduce the risk of the product due to the great difference between the production test mode and the actual application; meanwhile, the development period of new products can be reduced, and the cost is reduced.

Description

A new type of tuner simulation measurement system

technical field

The invention relates to a satellite downlink receiving test system, which belongs to the fields of tuner, satellite downlink receiver, satellite TV, satellite communication, and communication equipment, and in particular relates to a novel tuner simulation measurement system.

Background technique

Because the tuner mainly receives downlink signals from satellites, and because of this, the development and production of tuners will face the problem that the test method is too different from the actual application, and the distance between development and production and the actual application area is too far, so that Verification is difficult or impossible.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method to up-frequency the modulation signal through a single-channel or multi-channel multi-channel up-conversion module, and then transmit the signal through the transmitting antenna to down-frequency the tuner. The modem demodulates to confirm the received signal quality.

The present invention is achieved through the following technical solutions: a novel tuner simulation measurement system, including a computer, a modulation unit, an up-frequency module unit, a transmitting antenna unit, a non-reflection isolation box, a product controller, a product to be tested and The demodulation unit, the output end of the computer is respectively connected to the modulation unit, the product controller and the demodulation unit;

The product controller controls the demodulation unit, and the computer controls the modulation unit to generate a low-frequency modulation signal at the IF terminal. The low-frequency modulation signal generates a single or multi-channel multi-channel radio frequency signal at the RF1~RFn terminal through the up-frequency module unit, and the radio frequency signal is regenerated. The radiated signal enters the reflection-free isolation box through the transmitting antenna unit.

As a preferred technical solution, the up-frequency module unit includes a modulation filter unit, an n-way splitter unit, an m-way splitter unit, a single-channel up-frequency unit, and a radio frequency m-way combiner unit, and the low-frequency modulation signal passes through The modulation filter unit filters, and the filtered signal becomes 1~n multi-channel signal through the m-channel distributor unit;

After splitting, the signals are converted into n x m multi-channel signals through the m-channel splitter unit, and each channel signal is up-converted to a different frequency signal through its own single-channel up-conversion unit. The radio frequency combiner unit combines a single multi-channel radio frequency signal.

As a preferred technical solution, the single-channel frequency up-converting unit includes a low-frequency filter unit to filter the input low-frequency modulation signal and radio frequency mixing signal, and after passing through the mixer unit and mixing the signal of the local oscillator unit, the frequency is up-converted into a radio frequency signal, and the radio frequency signal passes through The radio frequency filtering unit filters out unnecessary noise.

As a preferred technical solution, a computer is also included, and each unit is controlled by the computer.

The beneficial effects of the present invention are: the present invention is used for molds with a higher production period, which can reduce the product due to the large difference between the production mode and the use; at the same time, the cycle of new products can be shortened, and the cost can be reduced at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Figure 1: Schematic diagram of the satellite receiving simulation test system of the present invention

Fig. 2: a block diagram of the multi-channel multi-channel up-conversion module system of the present invention.

Detailed ways

All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and/or steps.

Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

As shown in Figure 1, the computer 11 controls the modulation unit 12 to generate a low-frequency modulation signal at the IF terminal, and the low-frequency modulation signal is generated by the up-converting module unit 13 to generate a single or multi-channel multi-channel radio frequency signal at the RF1-RFn terminal, and the radio frequency signal Then the radiation signal through the transmitting antenna unit 14 enters the non-reflection isolation box (room) 15; the computer 11 sends a control command to the product controller 16, and the product controller 16 controls the product under test 17 to select the channel signal to be received, and the product under test 17 receives The radiated signal from the non-reflection isolation box (room) 15 is then down-frequency processed, and the received signal is sent back to the demodulation unit 18 through the product controller 16, and the computer 11 reads the signal quality after demodulation by the demodulation unit 18 and evaluates it. Record.

As shown in Figure 2, the IF/RF1~RFn ports correspond to the ports in Figure 1; the low-frequency modulation signal is filtered through the modulation filter unit 21, and the filtered signal becomes 1~n multiplexed through the n-way distributor unit 22 After splitting, the signals are converted into n x m multi-channel signals through the m-channel distributor unit 23, and each signal is up-converted into different frequency signals through the respective single-channel up-conversion unit 24, and the signals after up-conversion are m-channels as one The group is combined into a single-channel multi-channel radio frequency signal through the m-channel radio frequency combiner unit 25, and the remaining signals can be similar to the above, and each up-frequency is combined into a single-channel multi-channel radio frequency signal, and a total of n multi-channel radio frequency signals RF1-RFn ;

Among them, the above-mentioned single-channel frequency up-conversion unit 24 includes a low-frequency filter unit 241 to filter the input low-frequency modulation signal and radio frequency mixing signal, pass through the mixer unit 242, mix the signal of the local oscillator unit 243 and then upconvert it into a radio frequency signal, and the radio frequency signal passes through The radio frequency filtering unit 244 filters out unnecessary noise.

The above is only a specific implementation of the present invention, but the scope of protection of the present invention is not limited thereto, and any changes or replacements that do not come to mind through creative work shall be covered within the scope of protection of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope defined in the claims.

Claims (4)

1. A novel tuner simulation measurement system, characterized in that it comprises a computer, a modulation unit, a frequency-up module unit, a transmitting antenna unit, a reflection-free isolation box, a product controller, a product to be tested and a demodulation unit, and a computer The output terminals are respectively connected to the modulation unit, the product controller and the demodulation unit; The product controller controls the demodulation unit, and the computer controls the modulation unit to generate a low-frequency modulation signal at the IF terminal. The low-frequency modulation signal generates a single or multi-channel multi-channel radio frequency signal at the RF1~RFn terminal through the up-frequency module unit, and the radio frequency signal is regenerated. The radiated signal enters the reflection-free isolation box through the transmitting antenna unit. 2. A kind of novel tuner emulation actual measurement system as claimed in claim 1, it is characterized in that: described up-frequency module unit comprises modulation filter unit, n road divider unit, m road divider unit, single channel up Frequency unit and RF m-channel combiner unit, the low-frequency modulation signal is filtered through the modulation filter unit, and the filtered signal becomes 1~n multiple signals through the n-channel distributor unit; After splitting, the signals are converted into nxm multi-channel signals through the m-channel splitter unit, and each channel signal is up-converted to a different frequency signal through its own single-channel up-conversion unit. The radio frequency combiner unit combines a single multi-channel radio frequency signal. 3. A new type of tuner simulation measurement system as claimed in claim 2, characterized in that: the single-channel frequency up-conversion unit includes a low-frequency filter unit to filter the input low-frequency modulation signal and radio frequency mixing signal, and pass through the mixer After the signal of the unit and the mixed local oscillator unit is up-converted into a radio frequency signal, the radio frequency signal is filtered by the radio frequency filter unit to filter out unnecessary noise. 4. a kind of novel tuner emulation measuring system as claimed in claim 1, is characterized in that: also comprise a computer, control each unit by computer.