Specifications

SDM-300L3 Satellite Modem Revision 0
Remote Control Operation MN/SDM300L3.IOM
A–5
A.3 Configuration Commands/Responses
A.3.1 Modulator Configuration Commands
Modulator
Frequency
Command:
Response:
Status:
Response:
<add/MF_nnnnn.nnnn'cr'
>add/MF_nnnnn.nnnn'cr'
RF_OFF'cr''lf']
<add/MF_'cr'
>add/MF_nnnnn.nnnn'cr''lf']
Where: nnnnn.nnnn = Frequency in MHz, 950.0000 to
1750.0000 in 100 Hz steps for non-terminal frequency
display.
For terminal frequency mode, the range will be
determined by the LO frequency and high/low Mix of the
ODU.
Note: When the modulator frequency is programmed, the
RF output is switched off.
RF Output
(IF Output)
Command:
Response:
Status:
Response:
<add/RF_xxx'cr'
>add/RF_xxx'cr''lf']
<add/RF_'cr'
>add/RF_xxx'cr''lf']
Where: xxx = ON or OFF.
Modulator
Rate Preset
Assignment
Command:
Response:
Status:
Response:
<add/AMRx_nnnn_mmmm.mmm'cr'
>add/AMRx_nnnn_mmmm.mmm'cr''lf']
<add/AMRx_'cr'
>add/AMRx_nnnn_mmmm.mmm'cr''lf']
Where:
x = A, B, C, D, or V [preset designator].
nnnn = 1/2 (QPSK ½ Turbo and non-Turbo), [coder
rate], 3/4 (QPSK 3/4 Turbo and non-Turbo), 7/8
(QPSK 7/8), BP12 (BPSK ½), 8P23 (8PSK 2/3), OQ12
(OQPSK 1/2Turbo and non-Turbo), OQ34 (OQPSK
3/4 Turbo and non-Turbo), OQ78 (OQPSK 7/8), BPSK
(BPSK1/1 Turbo and non-Turbo), QPSK (QPSK 1/1
Turbo and non-Turbo), OQSK (OQPSK 1/1 Turbo, and
non-Turbo), 2144 (BPSK 21/44 Turbo Only), B516
(BPSK 5/16 Turbo Only), and 8P34 (8PSK 3/4 Turbo
Only).
mmmm.mmm = Data rate in kHz.
Modulator
Rate Preset
Selection
Command:
Response:
Status:
<add/SMRx_'cr'
>add/SMRx_'cr'
RF_OFF'cr''lf']
See MR command.
Where: x = A, B, C, D, or V (preset designator).
Note: Setting the modulator rate turns off the RF
transmitter.
Modulator
Rate
Variable
Assignment
& Selection
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.
nnnn = 1/2 (QPSK ½ Turbo and non-Turbo), [coder
rate], 3/4 (QPSK 3/4 Turbo and non-Turbo), 7/8
(QPSK 7/8), BP12 (BPSK 1/2), 8P23 (8PSK 2/3),
OQ12 (OQPSK 1/2 Turbo and non-Turbo), OQ34
(OQPSK 3/4Turbo and non-Turbo), OQ78 (OQPSK
7/8), BPSK (BPSK1/1 Turbo and non-Turbo), QPSK
(QPSK 1/1 Turbo and non-Turbo), OQSK (OQPSK 1/1
Turbo, and non-Turbo), 2144 (BPSK 21/44 Turbo
Only), B516 (BPSK 5/16 Turbo Only), and 8P34
(8PSK 3/4 Turbo Only).
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
Command:
Response:
<add/MOP_snn.n’cr’
>add/MOP_snn.n’cr’’lf’]
Where: snn.n = -30.0 to –5.0, in 0.1 steps (nominal range
in dBm) for the non TX L-Band modem and –40.0 to 0.0,
in 0.1 steps for the TX L-Band modem.