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

Maintenance and Troubleshooting9497B-21 C/Ku-Band TVRO4. In the “Response” windowverify proper GPS positionto within 1 nautical mileof your current position.The Latitude & Longitude positionof the GPS will be displayed in thefollowing format:“@ LAT,N,LON,E,A”Where LAT and LON are in degreesand minutes, LAT will be followedby N or S (North or South), LON willbe followed by E or W (East orWest), then a status character andfinally a checksum character.Furuno default value is in Japan at34.4N 135.2E(@3444,N,13521,E,,_).After acquiring a good fix at SeaTel the string is@3800,N,12202,W,A^for our 38N 122W Latitude andLongitude position.The status character tells you thestatus of the GPS.“,” (Comma) = GPS has NOTacquired a proper fix,“N” = GPS fix is NOT valid“A” = GPS has acquired a valid fix.7.4. Maintenance7.4.1. Balancing the AntennaThe antenna and equipment frame are balanced at the factory however, after disassembly for shipping ormaintenance, balance adjustment may be necessary. The elevation and cross-level motors have a brakemechanism built into them, therefore, power must be ON to release the brakes and DishScan and antennadrive must be OFF to balance the antenna. . Do NOT remove any of the drive belts. Balancing isaccomplished by adding or removing balance trim weights at strategic locations to keep the antenna fromfalling forward/backward or side to side. The antenna system is not pendulous so 'balanced' is defined as theantenna remaining at rest when left in any position.The “REMOTE BALANCE” parameter (located at the end of the Remote Parameters after REMOTE TILT) of theACU. When enabled, Remote Balance Mode temporarily turns DishScan, Azimuth, Elevation and Cross-Leveldrive OFF. This function is required when trying to balance antenna systems that have a built-in brakes onthe elevation and cross-level motors.Assure that Antenna power is ON and that the antenna has completed initialization.At the ACU:1. From the ACU - REMOTE BALANCE parameter: Enable balance mode (refer to your ACU manual).The screen should now display “REMOTE BALANCE ON”.At the Antenna:2. At the Antenna: Balance the antenna with the elevation near horizon (referred to as front to backbalance) by adding, or subtracting, small counter-weights.7-14