User Manual Dual C or Quad Ku Band TVRO Antenna (9497B-21)

Maintenance and Troubleshooting9497B-21 C/Ku-Band TVRO• The Azimuth display for the Home Switch will normally display a logic level high (plots directly onRed reference line after clicking on thebutton) when the home flag is NOT engaged andchanging to a logic level low when engaged. See below for a screen capture of an antenna that wasdriven so that the Home Flag switch is engaged.7.3.7. Open Loop Rate Sensor MonitoringThe DacRemP DISPW graph chart provides a means for monitoring the output of the 3 solid state ratesensors (located inside the Level Cage Assembly) for diagnostic purposes. The rate sensors are the primaryinputs 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 belowshows 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 andincrease (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 andincrease (plots above red line) as the antenna is rotated CW. In the example below, the output ofthe Azimuth rate sensor is plotted above the reference line, indicating that the antenna was drivenCW in Azimuth. Due to the in-practicality of driving an axis at a consistent rate, verification of rate7-8