JDS Uniphase CellAdvisor JD780A Series, User Manual

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JD780A Series Analyzers
530
Using T1 Analyzer
Measurement example
Figure 278 T1 transmission monitoring
Performing BERT testing
Making a test
Procedure
To select the measurement mode:
1.
Press the MODE hard key.
2.
Press the E1/T1 Analyzer soft key.
3.
Select T1 Analyzer > BERT .
To configure measurement parameters:
1.
Press the MEASURE SETUP hot key.
2.
Press the RX Mode soft key, and then select the receiver input option from the following choices:
–
Terminate : Provides 100-ohm nominal input impedance, according to the framing, line
code, and BER pattern settings.
–
Bridge : Provides input impedance greater than one kilohm for in-service monitoring,
bridging the receiver input across lines that are terminated elsewhere in the network.
–
Monitor : Provides 100-ohm nominal input impedance for the in-service monitoring of T1
lines.
3.
Toggle the Framing soft key between SF-D4 and ESF and select the framing type for your
receiver setting:
–
SF-D4 (Super Frame-D4): Group of 12 frames, used to align equipment for framing.
–
ESF (Extended Super Frame): Group of 24 frames, used to align equipment for framing.
4K for a maintenance channel (Facilities Data Link), 2K for CRC-6 checksum, and 2K for
framing/synchronization.
NOTE
If the framing type does not match with your receiver setting, a framing alarm occurs.