Comtech EF Data CDM-625 Installation And Operation Manual page 505

CDM-625 Advanced Satellite Modem
Appendix D
Command
Parameter Number of
(Instruction
Type Arguments
& Qualifier)
Request to RTS= 1 byte, value of
Send 0, 1, 2
HSSI HHC= 1 byte, value of
Handshake 0,1
Control
POCO PCO= 1 byte, value of
feature 0,1
(Power-On
Carrier-Off)
DoubleTalk CNM= 1 byte, value of
Carrier-in- 0 to 9
Carrier (CnC)
Mode
Description of Arguments
Command or Query.
Defines how RTS/CTS will operate 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 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 carrier (in order words, the modem will not bring up its TX carrier
until RTS is asserted.
2=Ignore RTS, Assert CTS.
Example: RTS=0 (RTS/CTS Loop, No Action)
Command or Query. (HSSI parameter)
Defines TA/CA control of the HSSI interface in the form x, where:
0 = TA to CA loop (default)
1 = RR control CA, TA control Tx output.
Example: HHC=0 (TA to CA loop)
Command or Query.
Use with caution.
If enabled, when a modem is power cycled, it will power up with the Tx carrier setting OFF.
0=POCO disabled (normal operation)
1=POCO enabled – care!
Example: PCO=0 (disabled – normal operation)
Command or Query.
CnC enable 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 has been 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.)
D–35
Revision 13
MN-CDM625
Query
Response to Response to
(Instruction &
Command
Qualifier)
RTS= RTS? RTS=x
RTS? (see Description of
RTS* Arguments)
RTS#
HHC= HHC? HHC=x
HHC? (see Description of
HHC* Arguments)
HHC#
PCO= PCO? PCO=x
PCO? (see Description of
PCO* Arguments)
PCO#
CNM= CNM? CNM=x
CNM? (see Description of
CNM* Arguments)
CNM#
Query