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System for testing performance of ISM (industry, science and medicine) frequency range communication product and testing method

A product and performance technology, applied in the field of testing the performance of communication products, can solve the problems of low test accuracy and achieve high test accuracy

Inactive Publication Date: 2011-09-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of low test accuracy of the existing methods for testing the performance of ISM frequency band communication products, thereby providing a system and testing method for testing the performance of ISM frequency band communication products

Method used

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  • System for testing performance of ISM (industry, science and medicine) frequency range communication product and testing method
  • System for testing performance of ISM (industry, science and medicine) frequency range communication product and testing method
  • System for testing performance of ISM (industry, science and medicine) frequency range communication product and testing method

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specific Embodiment approach 1

[0036] Specific implementation mode 1. Combination figure 1 Describe this specific embodiment, a system for testing the performance of ISM frequency band communication products, which includes a reference transmitter 1, a No. 1 multiplexer 2, an adjustable attenuator 3, a fixed attenuator 4, a combiner 5, and an interference signal source 6. Splitter 7, reference receiver 8, No. 2 multi-way switch 9 and oscilloscope 10, the communication product to be tested includes N transmitters to be tested and N receivers to be tested, and the N transmitters to be tested signal The transmitting end and the signal transmitting end of the reference transmitter 1 are connected to the signal input end of the adjustable attenuator 3 one by one or simultaneously through the first multi-way switch 2, and the attenuated signal output end of the adjustable attenuator 3 is connected to the attenuated signal of the fixed attenuator 4 The input end is connected; the fixed attenuation signal output en...

specific Embodiment approach 2

[0041] Embodiment 2. The difference between this embodiment and the system for testing the performance of ISM frequency band communication products described in Embodiment 1 is that it also includes No. 1 high and low incubator 11 and No. 2 high and low incubator 12. N test transmitters and reference transmitters 1 are located in No. 1 high and low incubator 11 , and N test receivers and reference receivers 8 are located in No. 2 high and low incubator 12 .

[0042] In this embodiment, considering that communication products need high and low temperature tests, the transmitter to be tested and the receiver to be tested are put into two high and low temperature boxes respectively, so as to facilitate the test under high and low temperature conditions. The purpose of putting the product into the high and low temperature box is twofold: the first is to facilitate the high and low temperature test after the normal temperature test; the second is to isolate the influence of the radi...

specific Embodiment approach 3

[0043] Specific embodiment three, based on the test method of a kind of system testing ISM frequency band communication product performance described in specific embodiment one, it is realized by the following steps:

[0044] Step 1. Make the reference transmitter 1 and the reference receiver 8 in the working state, and use a power meter to test the transmission signal power of the reference transmitter 1 under normal temperature conditions; When the machine is disconnected, the reference receiver 8 is connected to the link, and the N receivers to be tested are disconnected, the attenuation of the adjustable attenuator 3 is adjusted to zero, and the power meter is used to test the received signal power of the reference receiver 8 ;

[0045] Make a difference between the transmitted signal power of the reference transmitter 1 and the received signal power of the reference receiver 8 to obtain a link loss value between the reference transmitter 1 and the reference receiver 8, an...

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Abstract

The invention relates to a system for testing the performance of an ISM (industry, science and medicine) frequency range communication product and a testing method, and in particular relates to a system for testing the performance of a communication product and a testing method, and the problem of low testing accuracy of the existing method for testing the performance of the ISM frequency range communication product is solved. In the system provided by the invention, N transmitters to be tested and a reference transmitter are accessed to a chain through a No.1 multi-way switch and connected with N receivers to be tested and a reference receiver after passing through an adjustable attenuator, a fixed attenuator, a combiner and a shunt; and an oscilloscope displays the waveform of each receiver. In the method provided by the invention, the performance detection of the ISM frequency range communication product to be tested is realized by testing the sensitivity of the receivers to be tested, the transmission power of the transmitters to be tested, the same-frequency interference-resistant performance of the receivers to be tested, the multi-address interference-resistant performance of the receivers to be tested and the high and low temperature-resistant performance of the product to be tested. The invention is suitable for testing the performance of the ISM frequency range communication product.

Description

technical field [0001] The invention relates to a system and a testing method for testing the performance of communication products. Background technique [0002] Currently, wireless standards operating in the ISM frequency band mainly include Wi-Fi, Bluetooth, and ZigBee. Among them, Bluetooth uses the radio frequency modulation method of frequency hopping spread spectrum; 802.11a / 802.11g and 802.15.4 in Wi-Fi (called ZigBee when combined with the upper network layer) use the radio frequency modulation method of direct sequence spread spectrum Method; 802.11b adopts two radio frequency modulation methods, frequency hopping spread spectrum and direct sequence spread spectrum. All of the above-mentioned methods work in the worldwide ISM frequency band (ie 2.4-2.483 GHz). In addition, many chip manufacturers have launched wireless communication chips that work at 2.4GHz. For example, Nordic company NORDIC has launched a nRF24e1 chip with a built-in wireless transceiver nRF24...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04W24/08
Inventor 张文彬张建隆葛连正张中兆徐玉滨丛玉萍余君兰魏宏图刘宁庆王孝胡未段双滨
Owner HARBIN INST OF TECH
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