Comtech EF Data CDM-625 - Page 493

CDM-625 Advanced Satellite Modem Revision 13
Appendix D MN-CDM625
D–23
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
Rx Data
Invert
RDI=
Exception –
600/L
Emulation:
IRD=
1 byte, 0 or 1
Command or Query.
Invert Receive Data in the form x, where:
0=Normal
1=Inverted
Example: RDI=1 (selects Inverted RX Data)
RDI=
RDI?
RDI*
RDI#
RDI?
Exception –
600/L Emulation:
IRD?
RDI=x
(see Description of
Arguments)
Rx Reed-
Solomon
Decoding
RRS=
1 byte, value
of 0 thru 3
Command or Query.
Rx RS decoding in the form x, where:
0=Normal (based on the Open Network framing selected)
1=IESS-310 mode, valid with QDI, unframed, IBS, D&I, IDR.
2=EF Data legacy standard (225,205) – unframed, QDI only
3=IBS (126,112) – unframed only
Note: Available in all framing modes, except EDMAC.
(This is a ‘don’t care’ if no R-S is selected in FEC type)
Example: RRS=0 (selects Normal)
RRS=
RRS?
RRS*
RRS#
RRS?
RRS=x
(see Description of
Arguments)
Rx Spectrum
Invert
RSI=
1 byte, 0 or 1
Command or Query.
Rx Spectrum Invert in the form x, where:
0=Normal
1=Rx Spectrum Invert
Example: RSI=0 (selects Normal)
RSI=
RSI?
RSI*
RSI#
RSI?
RSI=x
(see Description of
Arguments)
Rx
Descrambler
RDS=
1 byte, 0 or 1
Command or Query.
Rx Descrambler state in the form x, where:
0=Off
1=Normal
2=IESS-315
Example: RDS=1 (Scrambler On)
RDS=
RDS?
RDS*
RDS#
RDS?
RDS=x
(see Description of
Arguments)
Rx Demod
Acquisition
Sweep Width
RSW=
3 bytes
Exception –
600L
Emulation:
2 bytes
Command or Query.
Rx ± acquisition sweep range of demodulator, in kHz. Available range depends on the symbol rate:
18ksps to 64ksps: ± 1 to the symbol rate (ksps)/2
64ksps to 389ksps: ± 1 to 32 kHz
389ksps to 2000ksps: ± 1 to 10% of sym rate
>2000ksps: ± 1 to 200 kHz
Example: RSW=009 (selects ± 9 kHz)
RSW=
RSW?
RSW*
RSW#
RSW?
RSW=xxx
(see Description of
Arguments)