ME8500 ETC automatic inspection system


This inspection system was developed for ETC 's OBE and RSU production lines and inspection lines, and it is capable of conducting radio system test and dynamic operation test (power profile test) automatically. It is capable of testing equipment itself and PCB mounting RF circuit.

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Test item

Wireless system test Dynamic operation test
1) Power source voltage / current Usual run test
2) Deviation of antenna power 1) Ideal pattern-OBE maximum input
3) Frequency deviation 2) Ideal pattern-OBE minimum input
4) Strength of spurious emission 3) Real pattern A
5) Tolerance of occupied frequency bandwidth 4) Real pattern B
6) Carrier off leakage power 5) Adjacent lane run pattern
7) Modulation factor 6) Shadow wing pattern
8) Adjacent channel leakage power Low-speed run test
9) Transmission opening eye ratio 7) Ideal pattern-OBE maximum input
10) Signal transmission speed 8) Ideal pattern-OBE minimum input
11) The allowable deviation of transmission output absolute time 9) Real pattern A
12) Receiving sensitivity 10) Real pattern B
13) Selectivity of adjacent wave 11) Adjacent lane run pattern
14) Spurious response 12) Shadow wing pattern
15) Strength of radio wave emitted secondarily High-speed run test

Item 1 of "power source voltage and current" is the measurement of DC supply voltage and current that are supplied to an OBE equipment, an OBE radio part PCB or a RSU radio part PCB.

 13) Ideal pattern-OBE maximum input
14) Ideal pattern-OBE minimum input
15) Real pattern A
16) Real pattern B
17) Adjacent lane run pattern
18) Shadow wing pattern
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Troublesome work of relocation of cable connection is unnecessary

In a wireless system test, it is an extremely troublesome work to change connection of measuring instruments for each test item, as many measuring instruments are used. With ETC automatic inspection system ME8500, measuring instruments and OBE or RSU signal are switched automatically by microwave signal switching equipment ME8530, signal switching and frequency counter ME8540 and connection and power source controller ME8580. Furthermore, correction to insertion losses of components such as the microwave coaxial cable and switch is also executed, and more accurate test results can be obtained.

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