Comtech EF Data CDM-740, Installation And Operation Manual

Page: 135 / 150

CDM-740 Advanced Satellite Modem Revision 0
Remote Control MN-CDM740
A–21
A.5.6 Modem Performance Information
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response
to
Command
Query
(Instruction &
Qualifier)
Response to Query
Rx BER N/A 5 bytes
Query only.
Returns the value of the estimated corrected BER in the form a.bE3,
where:
a.b = value, and
E3 = the exponent 10
-3
.
Returns 99999 if the demodulator is unlocked or BER data is
unavailable.
Example: BER=4.8E3 (which is BER=4.8 x 10
-3
)
N/A BE1? BE1=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 = value between -1 to -40 dB.
Negative sign (–) is implied.
Resolution = 0.1 dB.
Returns 99.9 if demod is unlocked.
R040 for values greater than -40.0 dB.
Example: EBN=12.3 (which is Es/No = -12.3 dB)
N/A ES1? ES1=xxxxx
(see Description of
Arguments)
Faults and
Status N/A 10 bytes
Query only.
Returns the current highest-priority fault and status codes for the Unit
(hardware), TX Traffic, RX Traffic, and ODUs:
a = Unit status :
0=No faults
1=Power supply fault, +5 volts
2=Power supply fault , +12 volts
3=Power supply fault, +3.3 volts
4=Tx synthesizer unlocked
5=Tx FPGA PLL unlocked
6=Modulator FPGA load fail
7=TPC/LDPC FPGA load fail
8=Reference unlocked (Note: Tx off)
9=Unit Temperature Exceeded
b = Tx Traffic status :
0=Tx traffic OK
1=Tx FIFO slip
2= Tx 130 MHz PLL unlocked
3= (Hi-Stab) No External Ref found (no activity)
c = Rx 1 Traffic status:
0=Rx Traffic OK
1=Demodulator unlocked
2=Rx FIFO Overrun
N/A FLT? FLT=abcdefghxx
(see Description of
Arguments)