SatelliteTelevision owner's manual TracVision G4

To adjust the GyroTrac reference to match the reference of the

autopilot (or other system), connect a voltmeter to GyroTrac

ADCU terminal (#8) and the reference terminal of the autopilot

(or other system). Adjust the GyroTrac reference voltage as

described in “Setting the Sine/Cosine Data Output” on page 69 until

the voltmeter indicates 0 VDC.

The sine/cosine interface should now operate with optimal

precision.

Connecting GPS for True North Capability

(Optional)

GyroTrac is capable of determining true north that is accurate,

under most conditions, to within ±1º. This capability requires a

GPS data input to the GyroTrac

NMEA sentences from the GPS must contain one or all of the

following sentences: VTG, VHW, or BWC. The sentence structure

must comply with the NMEA 0183 V2.20 standard and run at

4800 bps 8.N.1.

As illustrated in Figure 2-27 and the GyroTrac wiring quick

reference guide on the back cover of this manual, GPS interface

cables connect to the blue ADCU terminal strip connector at

terminals 23 and 24. Refer to your GPS user manual for the

correct NMEA data out configuration.

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TracVision G4 Technical Manual

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GPS A+

GPS B-

Blue Label

When the vessel is stationary,

certain GPS models may not output

the data required for GyroTrac to

determine true north.

Figure 2-27

GPS to ADCU Wiring