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ACCULINK 316x DSU/CSU
4-12 December 1996 3160-A2-GB22-10
Test Patterns
Use the Test Pattern commands to send, monitor
, and
abort transmission of test patterns on the DSU/CSU
network. A
vailable test patterns are:
• QRSS – A Quasi-Random Signal Source
approximating live data that can be monitored for
logic errors (on network and data ports).
• 1-in-8 – A test pattern consisting of a one (1)
followed by seven zeros (on network only).
• 511 – A Pseudo-Random Signal 511 bits long (on
data ports only).
Sending Test Patterns
Use
the Send command to start transmission of a test
pattern.
Only one test pattern can be active at a time on one
port. T
able 4-3 lists the valid send test pattern
combinations. V
alid combinations are identified by YES.
T
o send a test pattern,
1.
Press F2 to select T
est from the top-level menu
screen.
F1
DS
U E
SF
Stat Test Cnfig
F2
F3
2. From the T
est screen, press F3 to select Ptrns.
F1
Test:
Rlpbk Lpbk Ptrns
F2
F3
3.
From the Patterns screen, press F2 to select Send.
F1
Patterns:
Abort Send Mon
F2
F3
4.
From the Patterns Send screen, press F1 to send a
QRSS pattern, or F2 to send a 1-in-8 pattern, or F3
to send a 51
1 pattern.
F1
Patterns:
S
end
QRSS 1in8 511
F2
F3
If you press F2 to send a 1-in-8 pattern, skip
Step 5.
5. From the Send screen, press the function key that
corresponds to the network or port for which you
want to send a test pattern. Use the scroll keys, if
necessary. (NET does not appear for the 511
pattern.)
F1
Send:
Name
NET Prt1 Prt2
F2
F3
The T
est Started screen appears.
F1
Send:
Name and Dest
Tes
t S
tarted
F2
F3
If
the DSU/CSU is already sending the test pattern
you selected, the message
Already active
appears.
If selected an incompatible test pattern
combination, the message
Invld T
est Combo
appears. See Table 4-3 for valid combinations.