Nortel SONET AccessNode Manual page 79

Procedure 3-2 (continued)
Performing optical interface receiver sensitivity tests
Step
16
17
18
19
20
Action
Adjust the VOA/mVOA to the overload level given in the following table.
PEC
NT7E01CA/CB/CC/CD
NT7E01DA/DB/DC/DD
NT7E02KA/KB/KC/KD
NT7E02LA/LB/LC/LD
NT7E05AB/AC/AD
NT7E05BB/BC/BD
Note: The values for the OC-12 VTBM optical interface circuit packs are for
a link meeting the Nortel-to-Nortel proprietary link specification. For a
Bellcore Midspan-meet specification, the following exceptions apply.
NT7E05AB/AC/AD
NT7E05BB/BC/BD
Disconnect the test cord at the G1 receive connector and connect it to the
optical power meter. Reset the optical receive level for G1 optical circuit pack
to − 20 dBm, and then reconnect the test cord to G1 receive connector.
Repeat steps 5 to 17 to test receiver sensitivity of optical circuit pack G2.
Note: Where these steps refer to G1, read as G2. Where they refer to G2,
read as G1.
When step 18 is completed, both G1 and G2 are still in loopback and
receiving an optical level of -20 dBm.
Proceed according to your test method:
If you are testing with
DS1 or DS3 test equipment
SONET test set and OC-3 tributaries
Leave DS1 /DS3 test equipment connected. Leave the optical loopback
connected for protection switch testing.
Go to step 25.
—continued—
AccessNode Site Testing Procedures 323-3001-221 Issue 2.0
Tributary and optical tests for VTBM rings 3-17
Module
OC-3 LR
OC-3 IR
OC-12 LR
OC-12 IR
OC-12 VTBM LR
OC-12 VTBM IR
OC-12 VTBM LR
OC-12 VTBM IR
Maximum receiver
power (P )
R max
− 10.0 dBm
− 8.0 dBm
− 7.0 dBm
− 4.0 dBm
0.0 dBm
0.0 dBm
− 8.0 dBm
− 8.0 dBm
Then go to
step 20
step 21