Comtech EF Data SDM-2020 User Manual
Page 95
SDM-2020 Satellite Demodulator
Revision 4
Front Panel Operation
MN/SDM2020D.IOM
6–31
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CONFIGURATION
Demodulator configuration fault. Indicates the demodulator module or
interface does not support a programmed configuration parameter. This fault
typically occurs when the programmed configuration is not supported by the
module hardware.
Pressing
display a second menu called “DMD PROGRAMMING.” Pressing
again will display the possible fault combinations to make it easier to
determine which incompatibilities exist.
JUMPER POSITION
This fault indicates an invalid state. Usually, the jumper position is incorrect.
LOOPBACK STATE
This fault indicates an invalid state. Usually, the loopback position is
incorrect.
RX INTERFACE
Normally this fault will appear with other programming faults to indicate that
a particular programming parameter is not valid for that particular interface.
RX DATA RATE
If this fault appears alone, this would usually indicate that the demodulator
maximum data rate was exceeded. Refer Specifications, to analyze and
reprogram the data rate. If this fault appears with other faults, the
combination of faults should help determine which parameters are
programmed incorrectly.
RX SYMBOL RATE
The demodulator’s Symbol Rate has been exceeded, or is too low.
RX IF FREQUENCY
This fault indicates that the IF frequency is out of the demodulator’s
specification range. Refer to the MAXIMUM and MINIMUM IF frequency
range and readjust the IF frequency.
DBS MODE
Will usually be faulted with other programming faults. DBS mode requires a
204 framing type and requires the data clock to be in Serial Mode. Correct
the appropriate fault and re-enter.
SERIAL MODE
Will usually fault when the data rate is exceeded for a particular interface in
Serial Mode. Check the combination of faults and determine the best
operating parameter. Correct and reprogram.
PARALLEL MODE
Will fault when parallel mode is not a compatible parameter with another
selected parameter. Determine the correct course of action and reprogram.
FRAMING TYPE
This fault will usually occur in combination with DBS mode. Other faults
may also be present. See DBS mode above. Check combination of faults,
correct and reprogram.