Maintenance
4-19
3350-A2-GB20-10
June 1996
Test Patterns
Use the Test Pattern commands to send, monitor, and
abort test patterns. Only one test pattern can be active at a
time. Available test patterns are:
•
32767 – A pseudo-random bit sequence (PRBS)
that is 32,767 bits long. This is a PRBS 2
15
–1 test.
•
1-in-8 – A test pattern consisting of a one (1)
followed by seven zeros.
Sending Test Patterns
Use the Send command to start transmission of a test
pattern.
To send a test pattern,
1. From the top-level menu screen, select Test.
2. From the Test screen, select Ptrns.
F1
Test:
Lpbk
Ptrns
Lamp
F2
F3
3. From the Patterns screen, select Send.
F1
Patterns:
Abort
Send
Mon
F2
F3
4. From the Patterns Send screen, press F1 to send a
32767 pattern or F2 to send a 1-in-8 pattern.
F1
Patterns: Send
32767
1in8
F2
F3
The Test Started screen appears.
F1
Send:
Name and Dest
Test Started
F2
F3
Monitoring 32767 Test Patterns
The Monitor command provides the number of errors
detected in the 32767 test pattern.
To monitor a 32767 test pattern,
1. From the top-level menu screen, select Test.
2. From the Test screen, select Ptrns.
3. From the Patterns screen, select Mon.
F1
Patterns:
Abort
Send
Mon
F2
F3
The Monitor screen appears with the error count.
If the maximum of 99999 is exceeded, OvrFlw
appears instead of the count. If the receiver loses
synchronization while the monitor is active, No
Sync appears.
