
Installation and Operation Manual Chapter 4 Troubleshooting and Diagnostics
ASM-40 Ver. 1.0 Internal BERT 4-5
2. Press the PATT pushbutton. Verify that:
TEST LED is lit
ERR LED lights up momentarily.
If errors are encountered, the ERR led lights (for continuous errors) or blinks (for
intermittent errors), the ASM-40 unit is faulty and should be replaced. If the test
executes correctly, restore all pushbuttons and switches to their normal
positions.
Pattern
Generator
PATT
Pressed
ANA
Pressed
Transmitter
Receiver
ASM-40
Pattern
Tester
Figure 4-4. Modem Self-Test
Two-BERT Test
The Two-BERT test checks the link between the two DTEs (
Figure 4-5
).
To perform the Two-BERT test:
Press the PATT pushbutton on the front panel of the local and remote ASM-40
units.
If errors are encountered, the ERR led lights (for continuous errors) or
blinks (for intermittent errors), the ASM-40 unit is faulty and should be
replaced.
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