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Method for measuring communication port

A measurement method and communication port technology, applied in the field of communication port measurement, can solve problems such as inability to quickly and accurately reflect radio interference

Inactive Publication Date: 2012-06-20
CHINA NORTH VEHICLE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common electromagnetic field measurement method cannot quickly and accurately reflect the interference of the radio station after installation due to the difference in the location and type of the antenna

Method used

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  • Method for measuring communication port
  • Method for measuring communication port
  • Method for measuring communication port

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Combine below image 3 The layout of this test method is further explained: the vehicle antenna is a 2.4-meter passive whip antenna, and the base of the antenna is required to be well connected to the metal part of the vehicle body; in order to prevent the interference signal at the antenna port from affecting the receiver, in order to make the result more accurate, the In the case of large interference, 20dB attenuation should be added at the input end of the receiver, and then compensated by improving the calibration data on the path. If the output port of the antenna base is a 75 ohm system, an impedance matching network needs to be connected to make the output a 50 ohm system. If the output port of the antenna base is a 50 ohm system, there is no need to connect an impedance matching network.

[0021] Combine below figure 2 Path inspection of the test configuration in this test method is further explained to evaluate the entire measurement system from the vehicle...

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Abstract

The invention relates to a method for measuring a communication port. The method is used for restraining disturbance on a vehicular radio antenna from wire harness conduction coupling and space radiated disturbance coupling in an electronic device and a subsystem of the whole vehicle, so as to ensure that a mounted radio receiving device can receive normal radio signals. The method comprises the following steps: connecting a test cable with the tail end of a coaxial cable of a vehicular communication antenna port; scanning by a measuring receiver in a required frequency scope; measuring radiation emission of a vehicular device and cables related to the vehicular device; and estimating the disturbed degree of a vehicular radio under a certain condition by an antenna port test limit wire according to a test result. The method provided by the invention is especially suitable for the test for the disturbance of the vehicle to a broadband communication system after being installed.

Description

technical field [0001] The invention belongs to the field of interference signal testing coupled with antennas of vehicle-mounted radio stations, and relates to a communication port measurement method. Background technique [0002] Modern ground vehicles are equipped with a large number of complete sets of electronic and electrical equipment, forming a complex electromagnetic field environment inside the vehicle, which often causes the on-board radio to work normally when the equipment is running alone, but when working with other equipment or systems at the same time, the on-board The radio may experience degradation or loss of performance. Car radios are more sensitive and are prone to interference in this case. If the radio equipment is interfered, the command and control capability on the battlefield will be lost, which will bring unnecessary losses. The measurement of the communication port mainly tests the coupling interference of the radio port in the complex enviro...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B17/345
Inventor 赵晓凡杨光张毅
Owner CHINA NORTH VEHICLE RES INST
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