Black Box 32144, Manual

Page: 60 / 195

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MODEM 32144
Fig. 7-2. Analog Loopback Self Test (ALBST).
The SELFTEST screen will be
displayed, with ON and OFF as the
possible selections. Select ON to
activate the test. The EIA status
screen will be displayed while the
test is being conducted. If “ER” is
present on the front panel, data
errors have occurred. The ER
indicator may flash on when the
test is first turned on, but it should
quickly go out and remain off until
the end of the test.
TRANSMITTER
PATTERN
GENERATOR
RECEIVER
PATTERN
DETECTOR
In Hayes mode only, the
ALBST can be initiated using the
command &T8 (preceded by AT).
In any mode, the ALBST can be
initiated by using the modem’s
front-panel controls, as follows:
From screen 2 of the LCD MAIN
MENU, select TEST. This will take
you to screen 1 of the LOCAL
TEST menu, where ALBST will
be visible as one of the selections.
Select ALBST.