It is designed for the lower voltage synchros
such as Anshutz, 50 v ref 24 v line to line. For higher
voltages (115/90) external transformers may be fitted.
(Shown unde the main board in the picture.) The phase
output power is greater than 5VA.
Applications are to generate synchro gyro,
wind direction synchro, pitch and roll synchros and speed
synchro when retrofitting with an instrument without
a synchro output, include reproducing synchro in specialist
systems, and on retrofitting a modern gyro which does
not
have a synchro transmission. It can even be used to generate wind instrument
and rudder angle synchro signals.
The synchro output turns smoothly from
one heading to another without jerks or jumps, and the
turn rate is controlled by a rotary switch on the PCB.
- 360:1, 180:1 90:1, 36:1, 30:1, 9:1 or
1:1 ratio signals.
- Synchro or optionally "sine-cos" or resolver output.
COARSE & FINE transmissions are popular
on naval craft for driving turret servo systems.
Two of the interfaces would be used supplying, for example, 1:1 and
36:1.
SOME GYRO SYSTEMS SUCH AS GYLOT have a
coarse/fine arrangement in the steering stand. This interface
will allow a modern gyro to be installed whilst retaining
the existing Gylot autopilot and steering stand.
115/90v SYNCHROS: Step-up transformers
may be fitted for 115/90v synchros. In practice the interface
has enough power to drive them directly at reduced voltage
without transformers, and our tests show that 115v/90v
Microtechnica synchros follow perfectly.
Tests also show that 500 Hz Vega or Kurs
gyro repeaters follow perfectly at low voltage 50 Hz.
FREQUENCY: As standard the interface outputs
50/60 Hz synchro. If operated from 400/500 Hz it will
output 400/500 Hz synchro. It may also operate from 50/60
Hz, but produce 400/500 Hz phases, if supplied with low
voltage 400/500 Hz reference source.
WIND SYNCHRO. An option jumper allows the
interface to accept wind angle from NMEA input, and simulate
a wind vane transmission.
200 KNOTS/REV SPEED is also available.
