User's Manual

Synapsis Radar
with Nautoscan NX Pedestal
Operator Manual
Edition July 2015
2-41
4265.DOC020102
2.3.1.2 Tune
MANual TUNE
The tune function uses the trackball to control tuning of the receiver frequency
to match that of the transmitter.
Recommendation before using the tuning control.
To improve a good target reception and a minimal clutter effect we advise to
switch the pulse width selection to medium pulse (M2) or to long pulse (LP).
Operator controls
Task
For a preliminary manual setting:
Switch first to manual tune by clicking on the AUTO
soft button.
Use the trackball to place the cursor on the TUNE
slider then press the left trackball button.
Rotate the trackball for maximum deflection of the
slider.
As this setting must be averaged over a complete
antenna revolution, a peak detector is included for
operator convenience.
The tip of the tuning bar remains at the peak signal
detected during one complete revolution of the
antenna.
Bear in mind the fact that the transmitter frequency will drift
for the first thirty (30) minutes of operation from a cold start
due to inherent magnetron characteristics. As a result of
this, the receiver tuning will change during this time and a
final tuning adjustment should be made after approximately
thirty (30) minutes of operation. The tuning should also be
checked at every four hours thereafter.