Blinks when any test switch is pressed. This
indicator is visible through the front panel.
Lights when the carrier signal from the remote modem
CARR LOSS indicator
When the amplitude error rate is below a
MARG CKT indicator
predetermined threshold, the GOOD DATA indicator is
lit. For an error rate greater than the threshold,
the GOOD DATA indicator remains lit and MARG CKT
GOOD DATA indicator
also lights. A bit error rate less than the
threshold extinguishes the GOOD DATA indicator,
leaving only the MARG CKT lit.
Lights for a mark at the transmit logic data input,
XMT DATA Indicator
indicating transmit input data activity.
RCV DATA Indicator
Lights for a mark at the receive logic data output,
indicating receive output data activity.
( A3 board)
Lights whenever the RATE switch is not in position 1
or CH fallback is enabled.
Lights when regulated voltage is present.
Front Panel Controls and Indicators (2 of 2)