Modem Performance Indication - Comtech EF Data CDM-750 Installation And Operation Manual

CDM-750 Advanced High-Speed Trunking Modem
Serial-based Remote Product Management

7.5.11 Modem Performance Indication

Command
Parameter Number of
(Instruction
Type Arguments
& Qualifier)
Rx Signal N/A 5 bytes
Level
Rx Frequency N/A 6 bytes
Offset
Temperature N/A 3 bytes
Description of Arguments
Query only.
Returns value of Rx signal level in the form xxxxx, where:
xxxxx = value, in dBm, between –20 and –90 dBm.
If >-20dBm, returns RSL=GT-20 (GT = 'greater than')
If <-90 dBm, returns RSL=LT-90 (LT = 'less than')
If <-20 and >-90 returns RSL=EQ-XX (EQ = 'equal to')
If in the range of –20 to –90dBm, returns RSL=YY-xx
Example: RSL=EQ-45 (indicating –45 dBm)
Query only.
Returns value of measured frequency offset of the carrier being demodulated, in the form sxxx.x, where:
s = sign (+ or -)
xxx.x = value ranging from 0 to 200 kHz, in 100 Hz resolution.
Returns 999999 if the demodulator is unlocked.
Example: RFO=+002.3 (selects + 2.3 kHz)
Query only.
Returns the highest of 4 temperature sensors. Value of the internal temperature sensor, in the form xxx, where:
xxx = degrees C
Example: TMP=+26
7–37
Revision 2
MN-CDM750
Query
Response to
(Instruction & Response to Query
Command
Qualifier)
N/A RSL? RSL=xxxxx
(see description
of arguments)
N/A RFO? RFO=sxxx.x
(see description
of arguments)
N/A TMP? TMP=xxx
(see Description of
Arguments)