CN109286449B - Equipment tester for error code test and simulation of satellite transponder - Google Patents
Equipment tester for error code test and simulation of satellite transponder Download PDFInfo
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- CN109286449B CN109286449B CN201811166420.1A CN201811166420A CN109286449B CN 109286449 B CN109286449 B CN 109286449B CN 201811166420 A CN201811166420 A CN 201811166420A CN 109286449 B CN109286449 B CN 109286449B
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- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000004088 simulation Methods 0.000 title claims abstract description 8
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 239000013078 crystal Substances 0.000 claims abstract description 7
- 230000002238 attenuated effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0087—Monitoring; Testing using service channels; using auxiliary channels using auxiliary channels or channel simulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Quality & Reliability (AREA)
- Radio Relay Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention discloses a device tester for testing error codes and simulating a satellite transponder, wherein the output end of a terminal device one-port is connected with the input end of a fixed attenuator, and the output end of the fixed attenuator is connected with the input end of a combiner; the output end of the secondary port of the terminal equipment is connected with the fixed attenuator, and the output end of the fixed attenuator is connected with the input end of the combiner; the output end of the combiner is connected with the input end of the band-pass filter, the input end of the mixer is connected with the output end of the crystal oscillator to realize the conversion from an uplink signal to a downlink signal, the output end of the mixer is connected with the input end of the variable attenuator after mixing, and the mixer is divided into two paths of signals by the power divider and then sent to a first receiving port of the terminal equipment and a second receiving port of the terminal equipment to receive an antenna respectively; the keyboard display screen is connected with the microprocessor in a bidirectional way. The technical scheme has the advantages that satellite terminal equipment works simultaneously, compatibility is good, and the crystal oscillator and the band-pass filter of the local oscillator are replaced to realize satellite simulation forwarding work in different frequency bands.
Description
Technical Field
The invention relates to an error code test and device tester for simulating a satellite transponder, which is particularly suitable for development and test of satellite communication devices.
Background
In the design and implementation process of a communication system, the error code performance of the system is required to be tested, more specifically, the development and test of satellite communication equipment are not separated from the error code test equipment, the satellite communication equipment is seldom and independently researched and developed, a mixer is usually manufactured by a simulation satellite transponder, a local oscillator signal is provided by a signal generator, a combiner and a branching unit are also required in the test process, a plurality of high-power attenuators and variable attenuators are also required, a plurality of adapters of various types are sometimes required, each debugging process is complicated, a test platform is built, and the occupied space of a stall is large.
Disclosure of Invention
The invention aims to provide a device tester for error code testing and simulating a satellite transponder, which has the advantages of low power consumption, low cost, light weight, portability and good compatibility.
The task of the invention is accomplished in this way, which is characterized in that: the tester sets the display screen state and the attenuation of the variable attenuator according to test items, and is connected with two satellite terminal equipment transmitting ports and two terminal equipment receiving ports at the same time, the output end of one terminal equipment transmitting port is connected with the input end of the fixed attenuator, and the output end of the fixed attenuator is connected with the input end of the combiner; the output end of the secondary port of the terminal equipment is connected with a fixed attenuator, and the output end of the fixed attenuator is connected with the input end of the combiner; the two circuits are combined into one circuit, the output end of the combiner is connected with the input end of the band-pass filter, the filtered signals are transmitted to the mixer from the output end, the input end of the mixer is connected with the output end of the crystal oscillator to realize the conversion from uplink signals to downlink signals, the mixed signals are connected with the input end of the variable attenuator by the output end, the signals are further attenuated and then are connected with the input end of the power divider by the output end of the variable attenuator, and the signals are divided into two circuits by the power divider and then are respectively transmitted to a first receiving port of the terminal equipment and a second receiving port of the terminal equipment to receive antennas; the keyboard display screen is connected with the microprocessor in a bidirectional way, the microprocessor is connected with the FPGA circuit in a bidirectional way, the output end of the FPGA circuit is connected with the input end of the variable attenuator, and the FPGA circuit is connected with the error code test interface in a bidirectional way. The power of a primary port of the terminal equipment and a secondary port of the terminal equipment is lower than 100W; the keyboard display screen consists of keys and a Chinese liquid crystal display screen and is used for keyboard input, state display and test result display; the FPGA circuit is a high-capacity chip and simultaneously controls the attenuation of the variable attenuator; the error code test interface provides level conversion of input and output signals; the fixed attenuator realizes the attenuation of high-power radio frequency signals and adapts to the amplitude adjustment made by the input level of the combiner; the combiner combines the radio frequency signals of the two channels into one path for transmission; the band-pass filter has the function of removing clutter, harmonic waves and the like on the radio frequency; the mixer mixes the two paths of radio frequency signals with the local oscillation signal of the analog repeater, and changes the uplink signal into the downlink signal; the variable attenuator realizes the step decrease of the signal; the power divider realizes that one signal is changed into two signals. The fixed attenuator selects a high-power attenuator, the attenuation amount is 40dB, and the power is 100W; the digital variable attenuator is a 6-bit minimum stepping 1dB and maximum attenuation 50 dB, and the mixer carries out mixing of an uplink channel and a local oscillator.
The invention has the following effects: the technical scheme has the advantages that the satellite repeater is provided with error code testing and double-channel simulation, supports two satellite terminal devices to work simultaneously, has good compatibility, and can realize satellite simulation repeating work of different frequency bands by only replacing crystal oscillator and band-pass filter of a local oscillator.
Drawings
FIG. 1 is a schematic block diagram of the circuit of the present invention; FIG. 2 is a circuit diagram of a combiner; FIG. 3 is a circuit diagram of a bandpass filter; fig. 4 is a circuit diagram of a mixer; FIG. 5 is a circuit diagram of a digital variable attenuator; fig. 6 is a circuit diagram of a power divider.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the specific embodiment, as shown in fig. 1, the tester sets a display screen state and the attenuation of a variable attenuator according to test items, and is connected with two satellite terminal equipment transmitting ports and two terminal equipment receiving ports at the same time, wherein the output end of one terminal equipment transmitting port 1 is connected with the input end of a fixed attenuator 2, and the output end of the fixed attenuator is connected with the input end of a combiner 3; the output end of the secondary port 5 of the terminal equipment is connected with a fixed attenuator 6, and the output end of the fixed attenuator is connected with the input end of the combiner 3; the two circuits are combined into one circuit, the output end of the combiner is connected with the input end of the band-pass filter 4, the filtered signals are transmitted to the mixer 11 from the output end, the input end of the mixer is connected with the output end of the crystal oscillator 7 to realize the conversion from uplink signals to downlink signals, one digit is connected with the input end of the variable attenuator 10 from the output end after mixing, the signal is further attenuated and then is connected with the input end of the power divider 9 from the output end of the variable attenuator, and the signals are divided into two paths of signals by the power divider and then are respectively transmitted to the first receiving port 8 of the terminal equipment and the second receiving port 12 of the terminal equipment to receive antennas; the keyboard display 13 is connected with the microprocessor 14 in a bidirectional way, the microprocessor is connected with the FPGA circuit 15 in a bidirectional way, the output end of the FPGA circuit is connected with the input end of the variable attenuator 10, and the FPGA circuit is connected with the error code test interface 16 in a bidirectional way.
The power of a primary port of the terminal equipment and the power of a secondary port of the terminal equipment are both lower than 100W.
The keyboard display screen consists of keys and a Chinese liquid crystal display screen and is used for keyboard input, state display, test result display and other functions.
The microprocessor specifically controls the time sequence of various states of the FPGA circuit, the liquid crystal display and the scanning keyboard input.
The FPGA circuit is realized by a high-capacity chip, and the function of the FPGA circuit is to generate various code patterns, statistics of various results and the like, and simultaneously control the attenuation of the variable attenuator.
The error code test interface provides level conversion of input and output signals; the fixed attenuator implements attenuation of the high power radio frequency signal, amplitude adjustment made to accommodate the input level of the combiner.
The combiner combines the radio frequency signals of the two channels into one path for transmission, so as to save the resources of a filter, an attenuator and the like.
The function of the bandpass filter is to remove clutter and harmonics on the radio frequency.
The mixer mixes the two paths of radio frequency signals with the local oscillation signal of the analog repeater, and changes the uplink signal into the downlink signal.
The variable attenuator realizes the step decrease of signals and can be manually set according to actual needs.
The power divider realizes the function of changing one-path signal into two-path signals.
The invention is technically characterized in that:
meanwhile, the system has two functions of error code test and satellite transmission simulation.
The code pattern code class of the error code test has 8 kinds: a 5-level PN code, a 9-level PN code, a 15-level PN code, a 21-level PN code, a 10-level PN code, an all 1-level PN code, an all 0-level PN code, and a fixed bit segment 01111110.
The fixed attenuator is a high-power attenuator, the attenuation amount is 40dB, and the power is 100W.
The digital variable attenuator is a low-power consumption high-precision attenuation chip with 6-bit minimum step 1dB and maximum attenuation amount 50 dB.
The mixer mixes the uplink channel and the local oscillator, which is the core part of the analog satellite transponder, and the local oscillator LO inputs 7dBm.
The signals after being filtered are sent to a mixer to be mixed, which is the core part of an analog repeater, the mixer is connected with a digital variable attenuator, and the signals after being further attenuated enter a power divider to be respectively sent to receiving antennas of two devices of a terminal after being changed into two paths of signals, thus completing all functions of satellite analog forwarding.
The combining chip in fig. 2 completes two paths of radio frequency uplink signals to combine one path of functions.
The circuit of fig. 3 implements a bandpass filtering function for the upstream signal.
Fig. 4 is a mixer and crystal oscillator to effect conversion of an upstream signal to a downstream signal.
The digital variable attenuator of fig. 5 achieves variable attenuation of the downstream signal.
The power divider of fig. 6 implements splitting of the downstream signal.
The attenuation of the digital variable attenuator can be manually controlled, and the attenuation range is wide from 1dB to 50 dB.
The radio frequency components are chips with wide frequency band, high precision, low power consumption, small insertion loss and good isolation, and the working temperature range is wide, so that the radio frequency component is suitable for laboratory and field operation.
In the foregoing, the protection scope of the present invention is not limited to the preferred embodiments of the present invention, and any simple changes or equivalent substitutions of the technical solutions that are obvious to those skilled in the art within the technical scope of the present invention disclosed in the present invention fall within the protection scope of the present invention.
Claims (1)
1. An equipment tester for error code test and simulation of satellite transponder, which is characterized in that: the tester sets the state of a display screen and the attenuation of a variable attenuator according to test items, and is simultaneously connected with two satellite terminal equipment transmitting ports, two terminal equipment receiving ports, and the output end of one terminal equipment transmitting port is connected with the input end of a fixed attenuator; the output end of the secondary port of the terminal equipment is connected with a fixed attenuator, and the output end of the fixed attenuator is connected with the input end of the combiner; the two circuits are combined into one circuit, the output end of the combiner is connected with the input end of the band-pass filter, the filtered signals are transmitted to the mixer from the output end, the input end of the mixer is connected with the output end of the crystal oscillator to realize the conversion from uplink signals to downlink signals, the mixed signals are connected with the input end of the variable attenuator by the output end, the signals are further attenuated and then are connected with the input end of the power divider by the output end of the variable attenuator, and the signals are divided into two circuits by the power divider and then are respectively transmitted to a first receiving port of the terminal equipment and a second receiving port of the terminal equipment to receive antennas; the keyboard display screen is connected with the microprocessor in a bidirectional way, the microprocessor is connected with the FPGA circuit in a bidirectional way, the output end of the FPGA circuit is connected with the input end of the variable attenuator, and the FPGA circuit is connected with the error code test interface in a bidirectional way; the power of a primary port of the terminal equipment and a secondary port of the terminal equipment is lower than 100W; the keyboard display screen consists of keys and a Chinese liquid crystal display screen and is used for keyboard input, state display and test result display; the FPGA circuit comprises a high-capacity chip and is used for controlling the attenuation of the variable attenuator; the error code test interface provides level conversion of input and output signals; the fixed attenuator realizes the attenuation of high-power radio frequency signals and adapts to the input level of the combiner to adjust the amplitude; the combiner combines the radio frequency signals of the two channels into one path for transmission; the function of the band-pass filter is to remove clutter and harmonic waves on the radio frequency; the mixer mixes the two paths of radio frequency signals with the local oscillation signal of the analog satellite transponder, and changes the uplink signal into the downlink signal; the variable attenuator realizes the step decrease of the signal; the power divider realizes that one path of signal is changed into two paths of signals; the fixed attenuator selects a high-power attenuator, the attenuation amount is 40dB, and the power is 100W; the variable attenuator is a 6-bit minimum stepping 1dB and maximum attenuation 50 dB attenuator, and the mixer mixes the uplink channel and the local oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811166420.1A CN109286449B (en) | 2018-10-08 | 2018-10-08 | Equipment tester for error code test and simulation of satellite transponder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811166420.1A CN109286449B (en) | 2018-10-08 | 2018-10-08 | Equipment tester for error code test and simulation of satellite transponder |
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| Publication Number | Publication Date |
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| CN109286449A CN109286449A (en) | 2019-01-29 |
| CN109286449B true CN109286449B (en) | 2024-03-08 |
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| CN201811166420.1A Active CN109286449B (en) | 2018-10-08 | 2018-10-08 | Equipment tester for error code test and simulation of satellite transponder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111431587A (en) * | 2020-04-26 | 2020-07-17 | 亚太卫星宽带通信（深圳）有限公司 | Communication satellite return link and forward link testing method |
| CN112422170B (en) * | 2020-11-09 | 2022-10-28 | 大连交通大学 | Near-field automatic detection method for dual-band radio frequency equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951296A (en) * | 2010-09-02 | 2011-01-19 | 航天东方红卫星有限公司 | Spread-spectrum TTC integrated testing system for three-satellite parallel testing |
| CN107135030A (en) * | 2017-06-28 | 2017-09-05 | 刘铭 | Ku band satellite uplink test instrument and its method of work |
| CN208862846U (en) * | 2018-10-08 | 2019-05-14 | 中兵通信科技股份有限公司 | A kind of equipment tester of error code testing and analog satellite transponder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7203472B2 (en) * | 2002-03-15 | 2007-04-10 | Nokia Corporation | Method and apparatus providing calibration technique for RF performance tuning |
| EP1576751A2 (en) * | 2002-12-11 | 2005-09-21 | R.F. Magic Inc. | Signal distribution system cascadable agc device and method |
| US20090247098A1 (en) * | 2008-03-27 | 2009-10-01 | Gray Thomas A | System and Method for Autoranging in Test Apparatus |
| US20110169545A1 (en) * | 2010-01-14 | 2011-07-14 | Shahen Minassian | Low phase noise rf signal generating system and method for calibrating phase noise measurement systems using same |
| US9065559B2 (en) * | 2011-05-09 | 2015-06-23 | Bae Systems Information And Electronic Systems Integration Inc. | System for testing and calibrating core engine radio frequency (RF) circuit card assemblies |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951296A (en) * | 2010-09-02 | 2011-01-19 | 航天东方红卫星有限公司 | Spread-spectrum TTC integrated testing system for three-satellite parallel testing |
| CN107135030A (en) * | 2017-06-28 | 2017-09-05 | 刘铭 | Ku band satellite uplink test instrument and its method of work |
| CN208862846U (en) * | 2018-10-08 | 2019-05-14 | 中兵通信科技股份有限公司 | A kind of equipment tester of error code testing and analog satellite transponder |
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