Comtech EF Data CDM-750, Installation And Operation Manual

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CDM-750 Advanced High-Speed Trunking Modem Revision 2
Serial-based Remote Product Management MN-CDM750
7–37
7.5.11 Modem Performance Indication
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to Query
Rx Signal
Level N/A 5 bytes 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)
N/A RSL? RSL=xxxxx
(see description
of arguments)
Rx Frequency
Offset N/A 6 bytes 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 (s 2.3 kHz)
N/A RFO? RFO=sxxx.x
(see description
of arguments)
Temperature N/A 3 bytes 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
N/A TMP? TMP=xxx
(see Description of
Arguments)