Series 04 Ku-Band TVRO Antenna

Troubleshooting and Maintenance
Series 04 Ku-Band TVRO Antenna
7.3.5. Reference Sensor Monitoring
The DacRemP DISPV graph chart provides a means for monitoring the output of the 2 Axis Tilt
Sensor and the Home Switch sensor for diagnostic purposes. The Tilt sensor (located inside the
Level Cage Assembly) is the primary input for the antenna’s reference to the horizon (0° Elevation
and 90° Cross-Level). While the Home Switch Sensor (located at the antenna base) is used to
calibrate the antenna’s position relative to the vessels BOW.
• To view the reference sensors, select the graph chart.
• This chart displays the output of the Tilt Sensor via two traces, CL (Cross Level), LV
(Elevation) at a fixed 1º/ vertical division, and the home flag logic level via a single trace, AZ
(Azimuth).
• 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).
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