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B.3 configuration commands/responses, B.3.1 modulator – Comtech EF Data SDM-9000 User Manual

Page 222

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Remote Control Operation

SDM-9000 Satellite Modem

B–4

Rev. 4

B.3 Configuration Commands/Responses

B.3.1 Modulator

Modulator
Frequency

Command:
Response:

Status:
Response:

>add/MF_nnn.nnnn'cr'
RF_OFF'cr''lf']

>add/MF_nnn.nnnn'cr''lf']

Where: nnn.nnnn = Frequency in MHz, 50.0000 to 180.0000, in
2.5 kHz steps.

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''lf']

>add/RF_xxx'cr''lf']

Where: xxx = ON or OFF.

Modulator
Rate Preset
Assignment

Command:
Response:

>add/AMRx_nnnnn_mmmmm.m
mm'cr''lf']

Where:

x = A, B, C, or D (preset designator).

nnnnn = One of the following coder rates:

1/2 (QPSK 1/2)
3/4 (QPSK 3/4)
7/8 (QPSK 7/8)
16Q34 (16QAM 3/4)
16Q78 (16QAM 7/8)
8P23 (8PSK 2/3)
8P56 (8PSK 5/6)
N/A (Not Assigned)

mmmmm.mmm = Data rate in kHz.

Note: If the filter is calibrated for the Reed-Solomon, '+RS' will
be appended to the code rate. Example: 3/4+RS_44736.0.

Modulator
Rate Preset
Selection

Command:
Response:

Status:

>add/SMRx_'cr'
RF_OFF'cr''lf']

See MR command.

Where: x = A, B, C, or D (preset designator).

Notes:

1. Setting the modulator rate turns OFF the RF transmitter.
2. If the filter is calibrated for the Reed-Solomon, '+RS' will

be appended to the code rate. Example:
3/4+RS_44736.0.

Modulator
Power
Offset

Command:
Response:

Status:
Response:

>add/MPO_snn.n'cr''lf']

>add/MPO_snn.n'cr''lf']

Where: snn.n = +40.0 to -40.0, in 0.1 dB increments.

Note: The modulator power offset is added to the nominal
power level to adjust the transmit power range.

Modulator
Output
Power Level

Command:
Response:

Status:
Response:

>add/MOP_snn.n'cr''lf']

>add/MOP_snn.n'cr''lf']

Where: snn.n = -20.0 to +5.0, in 0.1 steps (nominal range in
dBm).

Note: The nominal power range is modified relative to the value
specified by the modulator power offset (MPO_).