RAD Data comm ASM-20 Especificações descarregar pdf (Página 39)

Chapter 4. Troubleshooting and Diagnostics

ASM-20

Installation and Operation Manual

4-4 Local Test - Analog Loopback 11/4/99 12:34

4.5 Modem Self Test

The modem self test verifies that ASM-20 is operating correctly.

To verify that ASM-20 is operating correctly:

1. Press the ANA (Analog Loopback) push button on the front panel. Both

the TEST and DCD LEDs should light up. If the DCD LED does not light

up, check that the CARRIER jumper is ON or that the RTS signal is ON

(high).

2. Press the PATT push button. Verify that:

•

DCD LED is still lit up

•

TEST LED is still lit up

•

ERR LED lights up for a short period.

The ERR LED should then turn off. If it lights up or blinks, then ASM-20

is faulty and should be replaced. If the test executes correctly, restore all

the push buttons and jumpers to the required position.

4.6 Local Test - Analog Loopback

This test checks the performance of the local modem, the local data terminal

and the cables connecting them. Perform it separately at the local and

remote sites.

ANA

Pressed

LINE

ASM-20

XMTR

RCVR

DATA

TERMINAL

CLK

DATA

Figure 4-3 Local ASM-20 in Analog Loopback

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 70 71

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