Use of 2M Bit Error Meter (Appendix 2) Use of 2M Bit Error Meter Connect the bit error meter with the instrument wiring, Rx to the device Tx, Tx to the device Rx. Instrument Settings Set the output code type: Press the Setup key, move the cursor in the lower right corner of the screen, use the “>” key to move the cursor to “ ”, and press “V” to switch until the code type selection at the bottom of the screen changes to PRBS15. Set the test results: Press the BE/BER key, and the words “CUR”, “MAX”, and “ACC” can be displayed in turn after BE in the center of the screen, indicating the error code within the current second, the maximum error code, and the cumulative error code of the instrument. Select “ACC” during the test. Start/Stop: Press Start/Stop to start the test, and “RUN” is displayed on the upper right corner of the screen. Press Start/Stop again to stop the test, and “Stop” is displayed on the upper right corner of the screen. Note: It is required to press Start to start the test. Judging from the situation of the instrument indicator light, the NO Signal light is on, indicating that there is no 2M signal entering the instrument or the signal is too weak. It may be that Rx and Tx are connected in reverse, or the device has no output, and the Rx line is broken. NO Sync light is on, indicating that 2M service is not available, the instrument Tx line may be broken or the device may have problems. Bit Error light indicates that the device has a bit error. AIS, the device sends AIS. Note: You can first check the settings of the instrument self-loop. ……
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