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Monitoring and Testing
4-26
3166-A2-GB20-10
November 1998
Test Patterns
Use the Test Pattern commands to send, monitor, and abort test patterns.
Available test patterns are:
H QRSS – A quasi-random signal source approximating live data that can be
monitored for logic errors (on the network and the data ports).
H 1-in-8 – A test pattern consisting of a one (1) followed by seven zeros (on the
network only).
H 511 – A pseudo-random bit sequence (PRBS) that is 511 bits long (on the
data ports only). This is a PRBS 2
9
–1 test.
Sending Test Patterns
Use the Send command to start transmission of a test pattern.
Only one test pattern can be active at a time.
" Procedure
To send a test pattern:
1. From the top-level menu screen, select Test.
2. From the Test screen, select Ptrns.
F1
Test:
Rlpbk Lpbk Ptrns
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 QRSS pattern, F2 to
send a 1-in-8 pattern, F3 to send a 511 pattern.
F1
Patterns: Send
QRSS 1in8 511
F2
F3
If you send a 1-in-8 pattern, skip Step 5.