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To test the fiber connection, do the following:
1. Set S2-1 to the ON position.
2. Locate the port label (P1-P4) above or below the front panel
switches, Activate Remote Loopback for a network port by moving
the appropriate front panel toggle switch UP or DOWN. A green TM
LED corresponding to the port under test will turn on. A BER test
can now be initiated using a BER tester or the built-in 511/511E pat-
tern generator.
3. Upon completion of the remote loop test, return the front panel
switch to center position. After approximately 30 seconds, the TM LED
should turn off.
7.3 THE V.52 TEST PATTERN GENERATOR
To use the V.52 BER test in conjunction with the Local or Remote Loop-
backs, follow these instructions:
1. Locate the “511/511E” toggle switch on the front panel of the Model
1194 and move it UP. This activates the V.52 BER test mode and
transmits a “511” test pattern into the loop. If any errors are present,
the red “ERR” LED corresponding to the port under test will blink
intermittently.
2. If the above test indicates no errors, move the V.52 toggle switch
down, activating the “511/E” test with errors present. If the test is
working properly, the local 1194 red “ERR” LED will blink approxi-
mately once every 2 seconds. A successful “511/E” test will confirm
that the link is in place, and that the Model 1194’s built-in “511” gen-
erator and detector are working properly.
Note
Note: When the unit is set for Network Clock Mode, the unit will
derive its timing from the Network (T1/E1)Interface. Failure to
connect to the network may result in bit errors during the 511 or
511/E test.