KVH Industries TracVision 4 User Manual download pdf (Page 46)

5.5 Antenna Gyro Assembly

1. Remove the printed circuit board (PCB) cover,

illustrated in Figure 5-2, using a #2 Phillips

screwdriver and a

⁄8" (10 mm) nut driver/socket.

2. Use the

⁄8" (10 mm) nut driver/socket to remove

the four nuts and washers securing the Antenna

Gyro to the Antenna Reflector. The nut on the

bottom right also secures another P-clip to the

Antenna Reflector. Set the nuts and washers aside.

3. Disconnect the 7-pin Molex connector from the

PCB. Place the old Antenna Gyro assembly aside.

4. Attach the 7-pin Molex to the new Antenna Gyro

assembly.

5. Replace the antenna gyro gasket.

6. Use the nuts removed in Step 2 to attach the new

Antenna Gyro to the Antenna Reflector. The

bottom right nut should be used to secure the

P-clip on the Antenna Gyro Cable. The Antenna

Gyro should be oriented so that the cable extends

from the top of the gyro.

7. Carefully move reflector through its range of

motion to ensure that the cable moves freely

between the elevation mechanism and the lower

assembly. Adjust the Antenna Gyro cable as

necessary to ensure proper motion. Also ensure

that the cables to the RF PCB do not interfere with

the Gyro motion.

Antenna Gyro Calibration

1. With the PC connected to the maintenance port,

apply power to the antenna unit.

2. Type

HALT<cr> 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. Record the 8-digital serial

number that was displayed in the startup message.

3. Type

DEBUGON<cr> to enter Debug Mode.

4. Type

DEBUGON<cr> to enter Debug Mode.

5-7

Maintenance

54-0150 Rev. D

Make sure the cable jacket passes

through the PCB access slot to

protect the wires from the edge of

the PCB frame.

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KVH Industries TracVision 4 User Manual Page 46

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