Comtech EF Data CDM-570A Installation And Operation Manual page 274

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Serial-based Remote Product Management
Command
Parameter (Instruction
Type Code and
Qualifier)
Request to Send RTS= 1 byte,
value of 0 thru 3
DoubleTalk CNM= 1 byte, value of
Carrier-in- 0 to 9
Carrier (CnC)
Mode
DoubleTalk
Carrier-in-
Carrier (CnC)
Mode (continued)
Arguments for
Command or
Response to
Query
Command or Query.
Sets or returns how RTS/CTS operates at the main data interface in the form x,
where:
0 = RTS/CTS Loop, No Action
RTS and CTS are looped, so that CTS echoes the state of RTS, but RTS
does not control the ON/OFF state of the carrier
1 = Loop, RTS Controls Tx O/P
RTS and CTS are looped, so that CTS echoes the state of RTS, and RTS
controls the ON/OFF state of the carrier (in other words, the modem will not
bring up its TX carrier until RTS is asserted.)
2 = Ignore RTS, Assert CTS
3 = 1:N system in use.
RTS/CTS ignored (Query only) RTS is ignored, and CTS is asserted
unconditionally.
Example: <0/RTS=0 (RTS/CTS Loop, No Action).
Command or Query.
Valid only in CDM-570A Compatible Mode (CMO=1).
Sets or returns CnC Mode in the form x, where:
0 = Off
1 = On (normal)
2 = APC, C-Band, Side A
3 = APC, X-Band, Side A
4 = APC, Ku-Band, Side A
5 = APC, Ka-Band, Side A
6 = APC, C-Band, Side B
7 = APC, X-Band, Side B
8 = APC, Ku-Band, Side B
9 = APC, Ka-Band, Side B
Notes:
1) CnC may be enabled only if:
• The optional plug-in hardware CnC card is installed AND a CnC FAST option
is unlocked.
• The range of permitted data rates is controlled by a FAST feature code.
(Read EID to decode the installed options for the modem)
2) If CnC-APC is active (APS=22), key transmission/reception (Modulation, FEC
type, Code Rate, Framing, Data Rate, Interface) cannot be modified until CnC-
APC is suspended. (Use APC command to suspend or activate.)
3) If CNM=2..9, AUP is forced to 3
4) Entries 1 to 9 are not valid if Tx or Rx Symbol Rate is <16ksps.
Description of Arguments
8–30
MN-CDM570A
Revision 3
Query
Response to
(Instruction Code
Command
and Qualifier)
RTS= RTS? RTS=x
RTS? (see Description of
RTS* Arguments)
RTS#
CNM= CNM? CNM=x
CNM? (see Description of
CNM* Arguments)
CNM#
Response to
Query