KVH Industries KVHTRACVISION G4 Technical Manual page 149

G.3 Furuno Output
The Furuno output is a proprietary message format typically
used with Furuno and other brands of radars and autopilots. Two
user-configurable options are available: true or magnetic heading
and 25 millisecond (40 Hz) or 200 millisecond (5 Hz) data rate.
The default rate is 200 millisecond/5 Hz.
Optional Stepper Components
An optional interface unit is available to generate a stepper
output. The stepper interface uses an NMEA HDM or HDT serial
message input to generate the stepper signal format. The stepper
signal replaces traditional gyro outputs used with satellite
communications systems, autopilots, and steering displays. The
Stepper Interface unit is shown in Figure G-1 while the
specifications are listed in Table G-6.
Please refer to the Stepper Interface User Manual for specific
wiring instructions.
Stepper Interface
Dimensions 10.5" (267 mm) x 5.8" (147 mm) x 2.3" (58 mm)
Weight 13 oz (370 gm)
Input NMEA 0183
Stepper Output 3, 6, 12, 24 steps/degree
Output Voltage 5 V standard (30-70 V option also available: Part
Number 19-0089)
Stepper Voltage Converter
A stepper voltage converter (KVH Part Number 19-0089) is
needed when the receiving stepper device uses a reference
voltage greater than the 5 volt maximum available from the
stepper interface. The converter is wired directly between the
stepper interface output and the receiving equipment to provide
the necessary reference voltage. An external 6-70 VDC power
supply is required to provide the necessary voltage to this device.
Figure G-2 on the following page shows the stepper voltage
wiring connections and wiring diagram.
54-0147
GyroTrac Data Outputs
Figure G-1
Stepper Interface
Table G-6
Stepper Interface Specifications
149