SeaSpace TeraScan 1.5M, Operation And Maintenance Manual

Page: 113 / 232

TeraScan 1.5m Polar Satellite Tracking Antenna O & M Manual
97
7.2.4.3 Tracking Positioner—Elevation Torque
7.2.4.4 Sea-Going Antenna with NMEA 0183 Input—Azimuth Mispositioned
CONDITION TEST CAUSE ACTION
Elevation torque is
excessive at some
elevations.
ac 1 eltorque
Reply shows elevation
torque as elevation
varies.
Torque reply: iv
crosslevel
elevation
azimuth.
Elevation torque should
not vary from 0 by more
than
±
20 (hexadecimal)
counts.
Antenna dish not
balanced.
Elevation belt tension
incorrect.
Harness cables binding.
Elevation belt teeth
stripped.
Rebalance dish {8.5.1}.
Set belt tension {8.4.32}.
Reposition cables.
Replace elevation drive belt
{8.4.32}.
CONDITION TEST CAUSE ACTION
Antenna slowly moves
clockwise and
counterclockwise
when a pass is not
being received.
ac 1 st
Reply shows Gyro mode.
Antenna default state must
be Satellite Reference
mode. Enter:
ac
1
reset
Wait 3 minutes, then enter:
^0071
NVRAM
(press Enter ).