Monitoring Transmission; Making A Test - JDS Uniphase CellAdvisor JD780A Series User Manual

Monitoring transmission

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 > Monitoring.
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.
4.
Toggle the Line Code soft key between AMI and B8ZS and select the line code type to send an
T1 signal:
–
AMI: It stands for Alternate Mark Inversion. A line code uses one three level signal to
convey binary digits in which successive binary ones ("marks" or pulses) are of alternating
polarity, either positive or negative, equal in amplitude. A binary zero ("space") is
transmitted as no pulse or zero amplitude.
–
B8ZS: It stands for Bipolar with 8-Zero Substitution. A coding scheme in which the
transmitter "substitutes" a fixed pattern of ones, zeros, and BPVs in place of 8 consecutive
zeros.
To start or stop monitoring:
1.
Press the MEASURE hot key.
2.
Press the Monitoring soft key, and then select the monitoring option as needed: Start, Stop, or
Clear.
Optional. You can save event records automatically by using the Save Logging Data soft key. See
"Using save" on page 31 for more information.
Using T1 Analyzer
JD780A Series Analyzers
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