Comtech EF Data CDM-760 - Page 256

Serial Interface Operation Revision 3
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
8–13
Parameter Type
Controller-to-Target
Instruction Code and
Qualifier
Arguments for
Command or
Query
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 to 57)
Target-to-Controller
(see Description of Arguments)
Command Query
Response to
Command
Response to
Query
Tx Alpha Rolloff
TAR=
TAR?
1 byte, value of 0
thru 5
Command or Query.
Sets or returns Tx Alpha Rolloff in the form x, where:
0=20%
1=25%
2=35%
3=5% (only available when NET>0)
4=10% (only available when NET>0)
5=15% (only available when NET>0)
EXAMPLE: <0/TAR=0 (selects a Tx Alpha Rolloff of 20%)
TAR=
TAR?
TAR*
TAR#
TAR=x
Tx Gold Code
Sequence Index
TGS=
TGS?
6 bytes
Command or Query.
Sets or returns Tx Gold Code Sequence Index in the form xxxxxx, where:
Gold Code Sequence Index=000000 to 262141
EXAMPLE: <0/TGS=189063
TGS=
TGS?
TGS*
TGS#
TGS=xxxxxx
Tx Pilot
TPI=
TPI?
1 byte, value of 0
or 1
Command or Query.
Sets or returns Tx Pilot in the form x, where:
0=Off
1=On
NOTES:
1) CEFD recommends that you use Pilots when running any 16-APSK, 32-APSK, or 64-APSK ModCod.
2) Pilots are recommended when the symbol rate is below 5000 ksps.
EXAMPLE: <0/TPI=0 (selects Pilot Off)
TPI=
TPI?
TPI*
TPI#
TPI=x
Tx Power Level
TPL=
TPL?
5 bytes
Command or Query.
Sets or returns Tx Output power level (dBm), in 0.1 dB steps, in the form sxx.x, where:
s=sign (+ or -)
xx.x=power level (dBm) from 0 to -25 dBm (70/140 MHz) or 0 to -40 dBm (L-Band)
EXAMPLE: <0/TPL=-13.4
TPL=
TPL?
TPL*
TPL#
TPL=sxx.x
Tx Carrier State
TXO=
TXO?
1 byte, value of 0
or 1
Command or Query.
Sets or returns Tx Carrier State in the form x, where:
0=OFF due to front panel or remote control command
1=ON
EXAMPLE: <0/TXO=1 (Tx Carrier ON)
TXO=
TXO?
TXO*
TXO#
TXO=x