Dte And Loop Test (Ll); Figure 3-2. Dte With Tp Test Diagram - ADTRAN DSU 56/64 User Manual

Chapter 3. Test Modes
DTE or Test
Equipment
Interface
The internal test pattern generator and detector of the DSU 56/64
operate with a 2047 data pattern. When this test is initiated, the test
pattern detector examines the receive data stream until
synchronization to the 2047 pattern occurs. Once synchronized, the
detector continues to check the receive data and reports any
detected bit errors by turning on the E
Once a test is initialized with the internal test pattern generator and
detector, errors can be injected into the transmit data stream by
pressing S
on for a brief period of time. As previously mentioned, the DTE
WITH
for the DSU 56/64.

DTE AND LOOP TEST (LL)

This test is initiated at the local DSU 56/64 and allows independent
testing of the separate sections of the DSU 56/64. This includes
testing of the local DTE interface with data from the terminal or test
equipment and testing of the loop interface section of the local DSU
3-4
DTE
Transmit
Interface
TD
RD
DTE
Receive
Interface
and observed by watching the E
ELECT
TP is automatically performed during the self-test sequence
DSU 56/64 User Manual
Test
Pattern
Generator
56/64 DSU
Transmit
Interface
DTE
with
Test Pattern
Receive
Interface
Test
Pattern
Detector

Figure 3-2. DTE with TP Test Diagram

LED.
RROR
Network
Interface
Loop
Loop TX
Loop RX
Loop
LED turn
RROR
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