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CDM-600L Satellite Modem
Front Panel Operation
CONFIG: MASK: BUFFER SLIP
BUFFER SLIP= ACTIVE
Select either ACTIVE or MASKED, using the [↑] [↓] arrow keys, then press ENTER.
CONFIG: MASK: RX-IF
RXIF:
Use the [←] [→] arrow keys to select the parameter to edit: AGC or Eb/No. Select either
ACTIVE or MASKED, using the [↑] [↓] arrow keys, then press ENTER.
CONFIG: MASK: SATELLITE ALARMS
Select either Tx or Rx, using the [←][→] arrow keys, then press ENTER.
CONFIG: MASK: SATELLITE ALARMS: TX
PROCESS ALARMS FROM
BWA1=OFF
Select the Backward Alarm (BWA) to be edited using the [←][→] arrow keys. Edit the
settings using the [↑] [↓] arrow keys, then press ENTER. Select how the TX IDR
backward alarm inputs are to be used. An activated alarm may respond to a hardware input
at P5A (H/W) or be software controlled by a receive fault on the modem (S/W).
If the user selects ACTIVE, then a Buffer Slip fault will be generated whenever
the receive circuitry senses that the buffer has either underflowed, or overflowed.
If the user selects MASKED, no alarm will be generated.
AGC = ACTIVE
EbNo = MASKED
If the user selects ACTIVE, then an AGC will be generated whenever the receive
signal level exceeds –20 dBm (for the desired carrier). An Eb/No fault will be
generated whenever the demodulator sees the receive Eb/No fall below the pre-
determined value.
If the user selects MASKED, no alarm will be generated.
SATELLITE ALARMS
TRANSMIT
BWA2=OFF
(ACTIVE,MASK)
(ACTIVE,MASK)
(ACTIVE,MASK)
RECEIVE
(H/W, S/W, OFF)
BWA3=S/W
BWA4=H/W
6–26
Revision 2
MN/CDM600L.IOM
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