Comtech EF Data CDM-570A - Manual (Page 270)

CDM-570A/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Serial-based Remote Product Management Revision 2
8–30
Parameter
Type
Command
(Instruction
Code and
Qualifier)
Arguments for
Command or
Response to
Query
Description of Arguments
Response to
Command
Query
(Instruction Code
and Qualifier)
Response to
Query
DoubleTalk
Carrier-in-
Carrier (CnC)
Mode
CNM= 1 byte, value of
0 to 9
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
CNM=
CNM?
CNM*
CNM#
CNM? CNM=x
(see Description of
Arguments)
DoubleTalk
Carrier-in-
Carrier (CnC)
Mode (continued)
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.
CnC
Frequency
Range/offset
CCF= 3 bytes Command or Query.
Valid only in CDM-570A Compatible Mode (CMO=1).
Sets or returns the maximum value that may be entered, in the form xxx, as the
CnC Sweep frequency range; depends on the Rx symbol rate as follows:
16ksps to 64ksps: ±1 to the symbol rate (ksps)/2
64ksps and above: ±1 to 32 kHz
Example: <0/CCF=030
CCF=
CCF?
CCF*
CCF#
CCF? CCF=xxx
(see Description of
Arguments)
CnC
Min/Max
Search Delay
CSD= 6 bytes Command or Query.
Valid only in CDM-570A Compatible Mode (CMO=1).
Sets or returns CnC min/max delay value in milliseconds, in the form xxxyyy,
where:
xxx = minimum delay
yyy = maximum delay
Maximum allowable value is 300ms
Example: <0/CSD=010225
CSD=
CSD?
CSD*
CSD#
CSD? CSD=xxxyyy
(see Description of
Arguments)