User's Manual

Synapsis Radar
with Nautoscan NX Pedestal
Operator Manual
4265.DOC020102
2-42
Edition July 2015
AUTO TUNE (only available in Master mode)
When auto tuning is activated, manual tuning is not available. The slider symbol
is hidden.
With automatic receiver adjustment, the tendency indicator
adjusts itself to the maximum value.
If the magnetron is at the end of its service life and the
transmission spectrum has become abnormal, select
manual tuning.
2.3.1.3 Gain
The GAIN control adjusts the sensitivity of the Radar video. If properly adjusted,
the GAIN control results in noise appearing as a light speckle at the dim level.
This light speckle setting results in maximum detectability of targets against
background noise. If GAIN is set too low, weak or distant targets could be
missed. Excessive gain increases background noise and could make target
detection more difficult. A gain slider is provided to indicate the GAIN control
setting.
Once the GAIN control has been set, it will automatically maintain the same
setting for all ranges. It is not necessary to readjust whenever a new range
scale is selected. However, it should be adjusted to optimize the Radar video
as clutter (sea and/or rain) conditions change.
The gain control function is active over its entire rotation range.
Operator controls
Task
Use the trackball to place the cursor on the GAIN
slider then press the left trackball button.
Rotate the trackball to adjust the optimal GAIN
value.