KVH Industries TracVision G8 - Manual (Page 101)

Calibrating the Gyros
To calibrate the azimuth and elevation gyros, follow the steps
below.
1. Follow the steps in Section 4.5, “Computer Diagnostics,” on
page 90 to connect a PC to the MCU’s maintenance port
and apply power to the antenna unit.
2. Type HALT then press Enter while the system is
performing the limit switch initialization routine. The
system will complete the initialization function by finding
the azimuth and elevation switch limits and then go to the
home position.
3. Type DEBUGON then press Enter to enter the Debug
Mode.
4. Type EL,300 then press Enter.
5. Using a digital level (or equivalent), measure and record
the angle of the feed tube, as shown in Figure 5-13.
Figure 5-13 Measuring Feed Tube Angle
6. Type =CALUP,XX.X, where XX.X is the number you
recorded in Step 5. Then press Enter.
7. Type =CALGYRO then press Enter. Verify that the
Antenna Gyro Azimuth scale factor is between -0.00090
and -0.00110 and the Antenna Gyro Elevation scale factor
is between 0.00090 and 0.00110.
8. Type ZAP then press Enter to restart/reinitialize the
system.
Maintenance
54-0198 105
Feed Tube