Comtech EF Data SDM-2020 - Manual (Page 186)

SDM-2020 Satellite Modulator Revision 7
Remote Control Operation MN/SDM2020M.IOM
A-16
Parameter
Type
Command/Status/
Response Description of Arguments Comments
Alarm Relay
State Command:
Response:
Status:
Response: >add/ARLY_xxx'cr''lf']
>add/ARLY_xxx'cr''lf']
Where: xxx = NRM (normal sense) or INV
(inverted sense).
This command controls the logic sense of the
Mod alarm relay (NC and NO contacts).
A.3 S
TATUS
C
OMMANDS
/R
ESPONSES
A.3.1 C
ONFIGURATION
S
TATUS
Parameter
Type
Command/Status/
Response Description of Arguments Comments
Modulator
Rate Command:
Response:
>add/MR_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.