Comtech EF Data CDM-625 - Manual (Page 502)

CDM-625 Advanced Satellite Modem Revision 15
Appendix D MN-CDM625
D–38
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
BERT 10E-3
Error Insert
BKE= 1 byte, value of
0 or 1
Command or Query.
Inserts 10E-3 BER in the form x, where:
x = 0 (Off) or 1 (On)
Example: BKE=1
BKE=
BKE?
BKE#
BKE? BKE=x
(see Description of
Arguments)
BERT Restart
Monitor
BRM= None Command only.
Example: BRM=
Note: This command takes no arguments. BRM= N/A N/A
BERT Result
in bit errors
N/A 7 bytes,
numeric
Query only.
BERT monitor results in bit errors. If bit errors exceed 9999999, then BRE=9999999.
N/A BRE? BRE=xxxxxxx
BERT Result
in average
BER
N/A 6 bytes Query only
Returns the value of the average BER in the form a.b x 10-c. First 3 bytes are the value. Byte 5 is the
exponent. Last byte is the indicator of Sync Loss. A ‘*’ in last byte means there was a loss of pattern
synchronization since last restart, but now is synchronized. A ‘_’ (space) in last byte means pattern
synchronization is achieved.
Returns 999999 if there’s no sync in BERT monitor.
Example 1: BRR=2.8E7 (BER is 2.8 x 10
-7 , and in sync)
Example 2: BRR=3.4E5* (BER is 3.4 x 10 -5 , and there was a Sync Loss)
N/A BRR? BRR=a.bEcx
ACM
parameters
ACM= 4 bytes Command or Query.
Defines ACM operating parameters in the form mMAT, where:
m=Minimum ModCod, range is 0 to 9, and A (for ModCod=10) or B (for ModeCod=11)
M=Maximum ModCod, range is 0 to 9, and A (for ModCod=10) or B (for ModeCod=11)
A= Defines action on remote demod unlock (0=go to minimum Tx ModCod, 1=maintain Tx ModCod)
T=Target Eb/No Margin, from 0 to 9 that is two times of the Eb/No in dB (from 0.0dB to 4.5dB).
Example: ACM=0B12
(Sets min ModCod=0, max ModCod=11, maintain Tx ModCod when remote demod unlocks,
sets Target Eb/No at 1.0dB.)
ACM=
ACM?
ACM#
ACM? ACM=mMAT
(see Description of
Arguments)
Forced
Reboot
FRB= None Command only.
Force a hard reset of the unit in 5 seconds.
FRB=
FRB?
FRB*
FRB#
N/A N/A
Carrier ID CAI= 1 byte, value
of 0 thru 1
Command or Query.
Carrier ID Enable/Disable in the form x, where:
0 = Disabled
1 = Enabled
CAI=
CAI?
CAI *
CAI #
CAI? CAI =x
(see Description of
Arguments)