User's Manual

Synapsis Radar
with Nautoscan NX Pedestal
Operator Manual
4265.DOC020102
2-46
Edition Sep 2015
2.3.1.7 Filtering Rain Clouds FTC
FTC is responsible for differentiation or removing the mean clutter level of rain
clouds. Adjusting the FTC will also reduce the land echoes and thin out larger
targets in range.
Operator controls
Task
Step 1 Select FTC
Advance the FTC control slowly (remember the 3
scans) until only the leading edges of the rain clutter
are visible. As the FTC is increased, weaker returns
will reappear.
Stronger returns will begin to reduce in the visible
area.
Too much FTC will shorten or delete RACON
responses.
Step 2 For fine adjustment use the RAIN slider
The best setting will be a balance between
restoration of weaker returns and adequate size of
the stronger returns.
Noising effect by maximum GAIN control
With FTC ON a false noise ring may be displayed.
This effect can be compensating by reducing the
GAIN control.