Comtech EF Data CDM-840 - Manual (Page 161)

CDM-840 Remote Router Revision 2
Serial-based Remote Product Management MN-CDM840
7–15
7.3.4 Demodulator Status Commands and Queries
Parameter
Type
Command
(Instruction
Code
& Qualifier)
Number of
Arguments for
Command or
Response to Query
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Response to
Command
(Target to
Controller)
Query
(Instruction
Code &
Qualifier)
Response to Query
(Target to Controller)
Rx Signal
Level
N/A 5 bytes Query only.
Returns the value of the Rx signal level, in dBm, from -25 to
-55 dBm with a tolerance of ±5 dBm. Resolution = 0.5dB.
Note the following:
If in the range of -25 to -55dBm, returns RSL=-xx.y
If >-25dBm, returns SL1=GT-25 (GT = ‘greater than’)
If <-55 dBm, returns SL1=LT-55 (LT = ‘less than’)
Example: <1/RSL?’cr’
N/A RSL? RSL=xxxxx
(see description
of Arguments)
Rx Es/No N/A 4 bytes Query only.
Returns the value of Es/No in the form xx.x, where:
xx.x = valuefrom -1 to -40 dB.
Negative sign (-) is implied.
Resolution = 0.1 dB.
Returns 99.9 if demod is unlocked.
Returns +040 for values greater than -40.0 dB.
The Es/No number correspond to the value that is displayed on HTTP (virtual
front panel) or SNMP. This value is averaged in the background for the
previous 16 values.
For a faster Es/No reading use REN command.
Example: <1/EBN?’cr’
N/A ESN? ESN=xxxxx
(see Description of
Arguments)