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Description
20 MHz Reference
Adjust
AGC Monitor
Modem Configuration
Threshold:
The threshold setting was developed to match the setting on the Fireberd Test set. Match the
threshold setting to the Fireberd when testing with that test set. Setting the threshold to high
will allow the BERT to stay in sync at lower Eb/No values.
The BERT results can be reset and the operator can insert 1 error to confirm BERT
operation.
This adjustment affects the Carrier frequency, BUC reference, and the LNB reference.
The demodulator may not lock if the 20 MHz Reference is not adjusted properly when the
modem has DSSS spreading turned on.
Make sure the Frequency Counter reference is extremely accurate before adjusting.
Oscillator stability: 6 x 10
-8
The AGC voltage is relative to the receive signal level of the modem. The minimum is 0 and
the max is 5 VDC. These settings are for the AGC DC voltage on the serial connector pin 5
with signal ground on pin 1.
SLM-5650C / SLM-5650C-ODU Satellite Modem
Parameters
6–20
Revision 1
MN-SLM-5650C
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