Patton electronic 1088/K user manual Using the V.52 BER Test Pattern Generator

Up mode. Note that once the 511/511E-pattern generator is started the Restart timer is changed to one minute (only on the unit which has the pattern enabled). If both units enable the 511/511E pattern within 4 seconds of each other, both units will be transmit- ting and receiving the 511/511E pattern. Both framers are now receiving unframed data and will restart after one minute. The 511/ 511E pattern generators will TimeOut after 45 seconds re-enabling the normal data path. The ER led will begin flashing until the user terminates the test.

Using the V.52 (BER) Test Pattern Generator

To use the V.52 BER tests in conjunction with the Remote Digital Loop- back tests (or with Local Line Loopback tests), follow these instructions:

1.Locate the “511/511E” toggle switch on the front panel of the 1088 and move it DOWN. This activates the V.52 BER test mode and transmits a “511” test pattern into the loop. If any errors are present, the local modem’s red “ER” LED will blink sporadically.

2.If the above test indicates no errors are present, move the V.52 tog- gle switch UP, activating the “511/E” test with errors present. If the test is working properly, the local modem's red “ER” LED will blink. A successful “511/E” test will confirm that the link is in place, and that the Model 1088’s built-in “511” generator and detector are work- ing properly.

Note The above V.52 BER tests can be used independently of the Remote Digital Loopback tests. This requires two operators: (1) to initiate and monitor the tests at the local Model 1088, and (2) to do the same at the remote Model 1088. In this case, the test pattern sent by each Model 1088 will not be looped back, but will be transmitted down the line to the other Model 1088. While one operator initiates test, the other monitors for errors.

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