Test Pattern (Ptrn) - ADTRAN DSU 5600 User Manual

Chapter 3. Test Modes

Test Pattern (PTRN)

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When the PTRN test is initiated, the local DSU 5600 uses the
integral test pattern generator to transmit a standard 2047 test
pattern to the DSU On the far end of the circuit. The local DSU
5600 then examines the received data for the standard 2047
pattern. Once this pattern is detected the, Error indicator is
turned Off. The Error indicator turns On when errors in the
receive data pattern are detected. While this test is active, errors
can be injected into the transmit data stream by pressing the
Select push button.
To initiate the PTRN test, use the following steps:
1. Press the Select switch seven times to turn On the PTRN test
indicator.
2. Press the Test switch while this test indicator is On. The
PTRN LED Flashes during initialization of the test and turns
On solid once the test is in progress.
To terminate this test, press the Test switch.
DSU 5600 User Manual 61200.078L1-1