Comtech EF Data SDM-300A - Manual (Page 397)

SDM-300A Satellite Modem Revision 6
Remote Control Operation MN/SLM3650.IOM
A–5
Modulator
Rate
Variable
Assignment
& Selection
(Selects &
sets the
variable
rate) Command:
Response:
Status:
<add/SMRV_nnnn_mmmm.mmm'cr'
>add/SMRV_nnnn_mmmm.mmm'cr'
RF_OFF'cr''lf']
See MR command.
Where: mmmm.mmm = Data rate in kHz.
For Non-Turbo nnnn = 1/2 (QPSK 1/2), [coder rate], 3/4
(QPSK 3/4), 7/8 (QPSK 7/8), BP12 (BPSK 1/2), OQ12
(OQPSK 1/2), OQ34 (OQPSK 3/4), and OQ78 (OQPSK 7/8),
OQSK (OQPSK 1/1), BPSK (BPSK 1/1), QPSK (QPSK 1/1),
and 8P23 (8PSK 2/3)
For Turbo nnnn= 8P34 (8PSK 3/4), 2144 (BPSK 21/44),
B516 (BPSK 5/16), 1/2 (QPSK 1/2), OQ12 (OQPSK 1/2),
3/4 (QPSK 3/4), and OQ34 (OQPSK 3/4)
Note: Setting the modulator turns off the RF transmitter.
Set
Modulator
Power
Offset Command:
Response:
Status:
Response: <add/MPO_snn.n’cr’
>add/MPO_snn.n’cr’’lf’]
<add/MPO_’cr’
>add/MPO_snn.n’cr’’lf’]
Where: snn.n = +99.0 to –99.0, in 0.1 dB increments.
Note: The modulator power offset is added to the nominal
power level to adjust the transmit power range.
Set
Modulator
Output
Power
Level Command:
Response:
Status:
Response: <add/MOP_snn.n’cr’
>add/MOP_snn.n’cr’’lf’]
<add/MOP_’cr’
>add/MOP_snn.n’cr’’lf’]
Where: snn.n = -30.0 to –5.0, in 0.1 steps (nominal range in
dBm).
Notes:
1. The nominal power range is modified relative to the
value specified by the modulator power offset
(MPO_).
2. The MOP_ command will return status only when
local AUPC is enabled.
3. High power option range is –20 to + 5 dBm.
Scrambler
Enable Command:
Response:
Status:
Response: <add/SE_xxx’cr’
>add/SE_xxx’cr’’lf’]
<add/SE_’cr’
>add/SE_xxx’cr’’lf’]
Where: xxx = ON or OFF.
Differential
Encoder
Enable Command:
Response:
Status:
Response: <add/DENC_xxx’cr’
>add/DENC_xxx’cr’’lf’]
<add/DENC_’cr’
>add/DENC_xxx’cr’’lf’]
Where: xxx = ON or OFF.
Note: Always Off in Turbo mode.
Modulator
Type Command:
Response:
Status:
Response: <add/MT_xxxx’cr’
>add/MT_xxxx’cr’’lf’]
<add/MT_xxxx’cr’
>add/MT_xxxx’cr’’lf’]
Where: xxxx = INTL (INTELSAT OPEN NETWORK), EFD
(EF DATA CLOSED NETWORK), CSC (COMSTREAM
CLOSED NETWORK), FDC (FAIRCHILD CLOSED
NETWORK), SDM51 (SDM51 COMPATIBLE).