Satellite-borne data combiner multiplexer testing device and method

A technology for on-board data and testing devices, which is applied in electrical digital data processing, instruments, etc., can solve the problems of low transmission rate, many signal lines, unable to meet the data transmission requirements of on-board data multiplexers and acquisition equipment, etc. The effect of increasing the transfer rate

Active Publication Date: 2020-09-08
NAT SPACE SCI CENT CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Question 1: The output of the on-board data multiplexer is upgraded from LVDS with source synchronous clock to SerDes, so the acquisition equipment in the test device also needs to be replaced accordingly
There are three main problems with this technology. First, there are many signal lines, and three types of signals are required to transmit a set of data; second, the transmission rate is limited, which can no longer meet the data transmission requirements between the on-board data multiplexer and the acquisition equipment.
Third, the bit error rate is high. The LVDS signal using the source synchronous clock has no error correction means. When the transmission rate is higher, the probability of bit error is greater.
There will be a clock skew (Skew) between the synchronous clock and the da

Method used

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  • Satellite-borne data combiner multiplexer testing device and method
  • Satellite-borne data combiner multiplexer testing device and method
  • Satellite-borne data combiner multiplexer testing device and method

Examples

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Example Embodiment

[0083] Example 1

[0084] Such as image 3 As shown, Embodiment 1 of the present invention provides a test device for a satellite-borne data multiplexer. The device is used to test the satellite-borne data combination multiplexer. The device includes: an analog data generation module, a multiplexer data acquisition module, and an analysis and comparison module set on an upper computer.

[0085] The analog data generating module is divided into functions, including: analog data generating unit and data processing sending unit.

[0086] The analog data generation module includes a main control part (FPGA module), a data simulation source control code part, an IO unit part (LVDS part) and a power supply unit. The FPGA module is connected with the LVDS chip;

[0087] The data simulation source control code part is used to generate data in FPGA, and control the LVDS chip through FPGA to send the data to the on-board data combiner;

[0088] The LVDS chip is used to convert the data generate...

Example Embodiment

[0113] Example 2

[0114] Such as Picture 10 As shown, based on the above system, Embodiment 2 of the present invention proposes a high-speed test method for a satellite-borne data multiplexer. The method specifically includes:

[0115] Step 1) After the device is powered on, the FPGA will initialize and configure the LVDS chip, DDR3 chip, PCIe interface, and SerDes chip to make it work normally;

[0116] Step 2) The analog data generation unit of the analog data generation module generates a data source that meets the requirements according to the test requirements and the specific conditions of the load. After a fixed clock interval, each frame of image data is transmitted to the data processing and sending unit in turn ;

[0117] Step 3) The data processing and sending unit of the analog data generation module converts each frame of image data received from single-ended data to differential data by controlling the LVDS chip, and sends it to the satellite-borne data multiplexer in...

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Abstract

The invention discloses a satellite-borne data combiner multiplexer test device and method. The device comprises an analog data generation module, a multiplexer data acquisition module and an analysisand comparison module arranged on an upper computer. Wherein the analog data generation module and the multiplexer data acquisition module are realized through an FPGA, and the analog data generationmodule is used for simulating a load to generate multiple frames of image data, performing format conversion on each frame of image data, converting single-ended data into differential data, and sending the differential data to the satellite-borne data combiner multiplexer for multiplexing processing; the multiplexer data acquisition module is used for acquiring SerDes type image data after multiplexing processing output by the satellite-borne data combiner multiplexer, caching the SerDes type image data after serial data parallelization processing, and sending the cached data to the analysisand comparison module of the upper computer in a PCIe bus mode; and the analysis and comparison module is used for carrying out check bit judgment on the received data and verifying the correctness of the data acquired by the satellite-borne data combiner multiplexer.

Description

technical field [0001] The invention relates to the technical field of spacecraft load testing, in particular to a testing device and method for a spaceborne data combining multiplexer. Background technique [0002] The function of the spaceborne data multiplexer is to receive the data of each payload (such as satellite platform data, payload data, etc.), multiplex and output it according to specific standards and formats, to complete the downlink processing task of scientific data . "Multiplexing" refers to framing multi-source data into a unified transmission frame according to a certain format and standard, so as to facilitate data transmission between stars and between stars and the ground. The connection relationship between the on-board data multiplexer and other equipment is as follows: figure 1 shown. [0003] Before launch, spacecraft payloads such as the spaceborne data multiplexer need to go through a series of ground tests, debugging and experiments. The perf...

Claims

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Application Information

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IPC IPC(8): G06F13/38G06F13/42
CPCG06F13/385G06F13/4291G06F2213/0026
Inventor 杜晔王连国饶家宁宋景星
Owner NAT SPACE SCI CENT CAS
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