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Monitoring and Testing
4-22
3162-A2-GB20-30
March 1999
Test Patterns
Use 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.
Use a monitor command to monitor a QRSS test pattern over all the channels on
the network interface, or to monitor QRSS or 511 test patterns on the channels
allocated to an individual port. A monitor command provides the number of errors
detected in the test pattern (5 digits, maximum 99999).
Only one test pattern can be active at a time on one port. Valid combinations are
identified by YES in Table 4-9.
Table 4-9. Valid Send Test Pattern Combinations
QRSS
(Network)
QRSS (Port)
1-in-8
(Network)
511 (Port)
QRSS
(Network)
N/A NO NO NO
QRSS (Port)
NO YES (on
separate ports)
N/A YES (on
separate ports)
1-in-8
(Network)
NO NO N/A NO
511 (Port)
NO N/A N/A YES (on
separate ports)
Sending Network QRSS or Network 1-in-8 Test Patterns
"
Procedure
To send a Network QRSS or Network 1-in-8 test pattern:
1. From the Main Menu screen, select Test.
2. From the Test screen, select Network & DTE Tests.
3. In the Send field (under Pattern Tests), enter either QRSS or 1in8 depending
on the type of test pattern that you want to send.
4. For the Send command (under Pattern Tests), select Start.