5-6
A Guide to TracVision SA
Antenna LNB Normalization and Stability Test
1. Type
HALT<cr>
to put the system into Idle Mode.
2. Type
DEBUGON<cr>
to put the system into
Debug Mode.
3. Type
FINDSAT<cr>
to begin the automatic signal
peaking process. Wait until the antenna peaks the
satellite signal and is motionless. The screen will
display
FINDSAT:PASS
.
4. Type
=CALLNB<cr>
to start the LNB
Normalization Function.
Note: The CALLNB Function requires the antenna
to be pointed directly at the satellite peak before
performing this routine.
5. The system must respond with the following
message:
CALLNB: PASS
. If the system displays
CALLNB: FAIL
, return to step 1 and retry the
procedure, making sure to achieve the highest
possible RF signal peak.
6. Record the Cold Sky Average and the RFGAIN
value reported in step 5.
7. Type
ZAP<cr>
. The system will re-initialize using
the new RFGAIN and RFOFFSET scale factors
displayed following step 5.
8. Wait for the system to perform the background
noise calculation. Read the Average Noise Level
value from the messages transmitted out the
maintenance port. This value must be greater than
300 and less than 1300. An example of the message
sequence and format is as follows:
*** Averaging Background Noise ***
Average Noise Level = 750
Noise Threshold = 1450
9. Wait for the system to search for, find the satellite,
enter Tracking Mode and track the satellite for a
minimum of 30 seconds. Record the average RF
signal value reported from the +POS: AZ, EL, RF
messages. An example of the message sequence
and format is as follows:
+POS: 154.5 33.2 2521
The CALLNB Function requires the
antenna to be pointed directly at
the satellite peak before performing
this routine. Using the FINDSAT
command will ensure that the
antenna is receiving the strongest
possible signal.
