Tracking Positioner-Elevation Torque; Sea-Going Antenna With Nmea 0183 Input-Azimuth Mispositioned - SeaSpace TeraScan 1.5M Operation And Maintenance Manual

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