Series 04 Ku-Band TVRO Antenna

Series 04 Ku-Band TVRO Antenna
Troubleshooting and Maintenance
• 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.
7.3.6. Open Loop Rate Sensor Monitoring
The DacRemP DISPW graph chart provides a means for monitoring the output of the 3 solid state
rate sensors (located inside the Level Cage Assembly) for diagnostic purposes. The rate sensors are
the primary inputs to the PCU for stabilization.
• To monitor the rate sensors, select the graph chart
• This chart displays sensed output from the 3 rate sensors via three traces, CL (Cross Level),
LV (Elevation), and AZ (Azimuth), at a fixed 1º/Second/vertical division.
• A normal trace display will be ± 1 divisions from the red reference line. The example shown
below shows an antenna that is NOT currently sensing motion in any axis.
• The Cross Level display should decrease (plots below red line) as the antenna is tilted to the
left and increase (plots above red line) as the antenna tilted to the right.
• The Level display should decrease (plots below red line) as the antenna is tilted forward and
increase (plots above red line) as the antenna is tilted back.
• The Azimuth display should decrease (plots below red line) as the antenna is rotated CCW
and increase (plots above red line) as the antenna is rotated CW. In the example below, the
output of the Azimuth rate sensor is plotted above the reference line, indicating that the
antenna was driven CW in Azimuth. Due to the in-practicality of driving an axis at a
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