RUN LOOPBACK SELF TEST

TM 11-7010-207-23

3-12. RUN LOOPBACK SELF TEST

NOTE

The NORM/LPBK switch enables either a Local/

Remote loopback test or normal operation. To

perform a local loopback test, do steps 1 thru 4

and 8. To perform a remote loopback test, do

steps 1 and 5 thru 8.

Local Loopback

Power indicator should light.

1. Power on converter.

If indicator does not light, begin troubleshooting (CU-TS-01)

2. Set NORM/LPBK switch to LPBK position.

3. Have system send data.

RLSD indicator should light

RD and TD indicators should be flickering

If indicators are not lit, begin troubleshooting (CU-TS-03)

4. Repeat steps 1 thru 3 for remote end of the link.

Remote Loopback

5. Set local converter's NORM/LPBK to NORM.

6. Set remote converter's NORM/LPBK to LPBK.

7. Have system send data for each converter.

RLSD indicator on each converter should light

RD and TD indicators on each converter should be flickering

If any or all of these indicators are not lit, begin troubleshooting

(CU-TS-00)

8. Place NORM/LPBK switch on local converter to NORM position.

3-4