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Serial Interface Operation
CDM-760 Advanced High-Speed Trunking Modem
8.5.12
Modem Performance Indication
Controller-to-Target
Instruction Code and
Qualifier
Parameter Type
Command
Query
Rx Signal Level
N/A
RSL?
Rx Frequency
N/A
RFO?
Offset
Temperature
N/A
TMP?
Faults and
N/A
FLT?
Status
Arguments for
Description of Arguments
Command or
(Note that all arguments are ASCII numeric codes from 48 to 57)
Query
5 bytes
Query only.
Returns value of Rx signal level, in dBm, in the form xxxxx, where:
xxxxx=value from -20 to -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')
EXAMPLE: <0/RSL=EQ-45 (indicating -45 dBm)
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 from 0 to 200 kHz, in 100 Hz steps.
Returns 999999 if the demodulator is unlocked.
EXAMPLE: <0/RFO=+002.3 (selects + 2.3 kHz)
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: <0/TMP=+26
9 bytes
Query only.
Returns the current highest-priority fault and status codes for the Unit (hardware), TX Traffic, RX Traffic, and ODUs in the form
aaaaaaaabbbbbbbbccccccccdexx, where:
aaaaaaaa=Unit status:
00000000=No faults
80000000=Main Board Power Supply 3.3V
40000000=Main Board Power Supply 1.5V
20000000=Main Board Power Supply 1.2V
10000000=Main Board Power Supply 1.8V
08000000=Main Board Power Supply 1.9V
04000000=Main Board Power Supply 2.5V
02000000=Main Board Power Supply 1.25V
01000000=Modem Board Power Supply 5.8V
00800000=Modem Board Power Supply 3.8V
00400000=Modem Board Power Supply 2.8V
00200000=Modem Board Power Supply 3.3V
00100000=Modem Board Power Supply 1.5V
00080000=Modem Board Power Supply 1.2V
00040000=Tx Power Cal
00020000=FPGA Load Fail
00010000=Reference Unlocked
00008000=Temperature Exceeded
00004000=Unit Fault
8–41
Revision 3
MN-CDM760
Target-to-Controller
(see Description of Arguments)
Response to
Response to
Command
Query
N/A
RSL=xxxxx
N/A
RFO=sxxx.x
N/A
TMP=xxxs
N/A
FLT=aaaaaaaa
bbbbbbbbccccc
cccdexx
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