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Troubleshooting
Symptom
DAPTcomm
Down
Permanent
"COMM Startup"
message
Permanent
"Logging
VoltMeas"
message
SQF does not go
higher than 1
Low SQF
indication
"Center 2"
significantly lower
than "Center 1"
(more than 20
points apart)
Chapter 2 • Pointing the antenna
30
1037663-0001 Revision A
The procedures above outlines the basic pointing process. Should
the DAPT display an error message or if you receive unexpected
results, use the information in Table 4 below to help you diagnose
and resolve the problem. If following the procedures outlined
below does not resolve the problem, contact Installer Support.
Table 4: DAPT display messages
Indication
Display on DAPT when the DAPT is internally
in a state where communication with the
satellite modem should have already been
established, or had been established and was
lost for more than 5 seconds. If the DAPT is
unable to establish communication with the
IDU, DAPTcomm Down appears on the display.
IDU is not in pointing mode. Advance button
was been pressed before submitting the
installation parameters.
Cables on the DAPT are not connected
properly.
• Circular polarization setting is incorrect.
• Installation parameters incorrect.
• No Rx cable connected between DAPT and
LNB, or bad cable used.
Incorrect installation parameters entered
Squinter is still on the feed horn.
Corrective Action
If the DAPT remains in this state, reboot the
IDU.
At the LUI, verify that the IDU is in pointing
mode (refer to Figure 6 on page 12). If the
IDU is not in pointing mode, repeat steps
4 - 8 of Entering installation parameters on
page 8. If the DAPT does not display the
SQF reading (SQF<>sqf) after a few
seconds, press the Advance.
Reconnect the cables to the DAPT in
accordance with the connector labels on
the DAPT rear panel.
• Set the polarization to LHCP or RHCP as
indicated on the Terminal Pointing Info
screen (Setting for ODU Polarization).
• Go to "Modify Installation Parameters"
under "Advanced Configuration and
Statistics" and use the Installation
Reference Sheet to make the appropriate
corrections.
• Connect/replace the Rx cable between
DAPT and LNB.
If incorrect parameters were entered, the
modem could be installed in the wrong
downlink cell. Go to "Modify Installation
Parameters" under "Advanced
Configuration and Statistics" and use the
Installation Reference Sheet to make the
appropriate corrections.
Remove the squinter from the feed horn
and verify the new Center 2 reading in the
DAPT display.
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