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SGN 71001-1017
27
5.7
Signal Strength - EB
The
EB command can be used to query the current signal strength as estimated by the
demodulator. This command returns the E
b
/N
0
(a signal strength measurement) in dB. If the
current version of software in the demodulator does not support this feature the result of the
query will be a “Not Supported” error. If the demodulator is not acquired, the result of the query
will be “Not Available.”
5.8
Fall Back Carrier - FBC
The
FBC command is used to setup a carrier in cases where the carrier is lost for a number of
seconds specified by the timeOut. The
FBC command is used on carriers that have backup
transponders.
The
FBC command comes in two forms:
FBC
Query the current
FBC
settings. The response will display the
frequency, data rate, and timeOut set for the FBC.
FBC
Frequency, data rate, timeOut
Where the parameters are defined as:
Frequency:
The fallback carrier L-Band frequency
920000 to 2050000:
The carrier frequency in kilohertz.
0:
No fallback carrier
Data Rate:
The fallback carrier data rate
512000 to 25000000:
The data rate in hertz.
0:
No fallback carrier
TimeOut:
The TimeOut before the fallback carrier is tried
20 to 4294967295:
Number of seconds to wait before trying
the fallback carrier.
0:
No fallback carrier
If any of the fallback carrier parameters are zero the receiver will not attempt to find a fallback
carrier. The
FBC settings are saved in non-volatile memory.
5.9
Fade Counter - FC
The
FC command keeps track of the number of fades the receiver has undergone since the last
time the counter was cleared. The counter can be cleared by issuing this command with a
parameter of 0. The
FC value is stored in non-volatile memory. The counter is capable of
counting up to 4 billion fades.
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