User's Manual Part 5

CORRECTIVE MAINTENANCE ROI-S05751
5-18
Chart 5-2 (Cont’d)
Step Procedure
1 At both transmitting and receiving ends, set the BER test set as
follows:
Note: Operation of the TX SW and RX SW are not required in
1+0 system for the following.
2 In HS system, set the TX SW to No.1 or No.2 to “On” condition
at transmitting end (refer to Chart 2-3),
3 At receiving end, set the RX SW to either No.1 or No.2 to “On”
condition,
4 Measure BER at required CH and confirm that the values are
indicated as follows:
Requirement: 1 x 10
–12
or less
5 At receiving end, change setting of the RX SW to opposite No.1
or No.2 from it in step 5 and confirm that the measured value
satisfies requirement as in step 6,
6 Change setting of the TX SW to opposite No.1 or No.2 from it
in step 4 and confirm that the measured value satisfies
requirement given in step 6,
7 At receiving end, change setting of the RX SW to opposite No.1
or No.2 from it in step 7 and confirm that the measured value
satisfies requirement given in step 6,
8 Restore all connections and controls to normal.