Sea Tel 9497B-21, Installation And Operation Manual, Page: 58 / 104

Maintenance and Troubleshooting 9497B-21 C/Ku-Band TVRO
7-16
•
The normal trace display for the Tilt Sensor, after performing remote tilt calibration, will be
±
4
divisions from the red reference line. Any trace line average plotted above this is of concern and
troubleshooting required. See below for a screen capture of an antenna that is Level in both the
Cross-Level and Elevation Axis.
•
The Cross Level Tilt display should plot on the red reference line when the level cage is level,
referenced to the horizon. It should decrease (plots below red line) when the antenna is tilted to the
left and increase (plots above red line) when tilted to the right. See below for a screen capture of an
abnormal CL trace Plot, it is an indication that the antenna that is either listed to the right approx. 4
degrees or the PCU requires to much CL tilt bias.
•
The Level tilt display should plot on the red reference line when the level cage is level, referenced to
the horizon. It should decrease (plots below red line) when the antenna is tilted forward (EL down)
and increase (plots above red line) when tilted back (EL up).
•
The Azimuth display for the Home Switch will normally display a logic level high (plots directly on
Red reference line after clicking on the
button) when the home flag is NOT engaged and
changing to a logic level low when engaged. See below for a screen capture of an antenna that was
driven so that the Home Flag switch is engaged.