ComStream CM601, Инструкция по установке и эксплуатации

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22 Command Descriptions 01-0799-401D 08/02
AQ Acquisition (Config) (NV)
Use this command to determine the acquisition status of the demodulator or to
restart acquisition.
AQ <status>
Remote/front panel <status> parameter values are:
■
0/STOP causes the demodulator to stop searching for a receive signal carrier.
This is typically used if the demodulator is synchronized to the receive signal
and is actively demodulating valid data.
■
1/NORMAL (default) causes the demodulator to begin searching for the
receive signal carrier. The demodulator will acquire the carrier closest to the
frequency at which the search begins. Reentering AQ restarts acquisition.
■
2/FAST causes the demodulator to go into fast acquisition. Recommended for
low noise applications only, where E
b
/N
0
is greater than 8 dB.
From the front panel select:
Config > More > #:Modem > Acquisition
AR Acquisition Range (Config) (NV)
Use this command to define the size of the frequency range over which the
demodulator will search for the carrier. The acquisition range is expressed in Hz.
AR <value>
<value> parameter values are integers from 0 to 500000. The default is 30000.
The specific value is +/– the range. For example, with a value of 30000 (30 kHz)
the overall search range is 60 kHz.
BIT Built-In Self-Test (Config) (V)
Use this command to perform a built-in, card-level self-test for all the cards
installed in a CM701.
BIT 0
A report of the results will be displayed on the remote terminal or the front panel
as a list that can be scrolled. A response other than X:XXXXX PASS (0), where
X:XXXXX is the slot # and card type, indicates a hardware failure; contact
Customer Service. After the completion of a self-test, the unit is returned to its
original configuration. To view the results again, reissue the remote BIT 0 or front
panel Self Test command.
From the front panel select:
Config > #:M&C > Misc > Self Test