NMEA to Synchro/Resolver Interface

The KW960 interface converts serial NMEA 0183 data to a low power synchro, resolver, or sine-cosine output signal with ratios from 1:1 to 360:1. Applications include refitting a ship with a new gyro, whilst retaining the existing systems such as an autopilot. The output will drive a single synchro motor or numerous electronic interfaces such as gyro heading repeater, autopilot, wind direction, pitch and roll and speed log.


  • Selectable input types
  • Can output as synchro or resolver
  • Compliant with IEC60945


NMEA to Synchro/Resolver Interface



115v/230v 50/60Hz nominal at 25 VA approx. (Transformer secondary 2 x 25v)


Jumper J3 = 0 = Heading. True has priority over Magnetic. Wind angle from $WIMWV true or relative sentence. RATIO OPTION: Jumper J2=0=1:1 ratio. Jumper J3=1=Wind angle from $WIMWV input. Other options available. Available ratios 9:1, 10:1, 30:1, 36:1, 90:1, 180:1, 360:1


SYNCHRO: Nominal 10 to 35 volts maximum line to line. Adjustable. 5VA total.S1, S2, S3, with virtual centre at ground plane of Interface.

RESOLVER: Nominal 20 volts maximum. S1, S2, referenced to ground plane. S1, S2, AC  relative to sine and cosine of angle.

REFERENCE: Nominal 25v or 50 v from main transformer, or from an external reference input. Jumper selected. (May be 50 - 500 Hz) ACCURACY: Within 1 degree of synchro or resolver output. Approx. to 9 bits.


250 x 300 x 155mm