Comtech EF Data SDM-2020 - Manual (Page 222)

SDM-2020 Satellite Modulator Revision 7
Remote Control Operation MN/SDM2020M.IOM
A.2 C
ONFIGURATION
C
OMMANDS
/R
ESPONSES
A.2.1 M
ODULATOR
C
ONFIGURATION
C
OMMANDS
Parameter
Type
Command/Status/
Response Description of Arguments Comments
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
Assignment Command:
Response:
Status:
Response: >add/AMRV_nnnnn_mmm.mmmmmm'cr''lf']
>add/AMRV_nnnnn_mmm.mmmmmm'cr''lf']
Where:
nnnnn = 1/2 (QPSK 1/2) [Coder rate], 3/4
(QPSK 3/4), 7/8 (QPSK 7/8), 5/6 (QPSK
5/6), 2/3 (QPSK 2/3), 8P23 (8PSK 2/3),
8P56 (8PSK 5/6), 8P89 (8PSK 8/9),
16Q34 (16QAM 3/4), 16Q78 (16QAM
7/8).
mmm.mmmmmm = Data rate in MHz.
Note: When using a SMPTE 310M
interface, the data rate is fixed at
19.392658 MHz. While the code rate can
be changed as applicable, an invalid
parameter message will be generated if
any other data rate is input for change.
A-5