Consilium SELUX ST, Installation And Service Manual

Page: 92 / 180

RADAR CONFIGURATION
3.19 Rev. E
3.9.2
QV (Quantized Video)Threshold
Pressing the
B
button of fig. 3.9.1 is possible to set the QV. The threshold is used by the
automatic tracking to identify real radar echoes from receiver noise. This value depends
from the receiver noise, from the transceiver band, from the video cable attenuation. This
value can be set manually adjusting the noise level to see some points visible at 24 NM
range scale.
This adjustment is really subjective, and the receiver gain changes with the selected pulse
length, with the weather, the humidity and so on, so the preferred solution is to activate
the Auto Threshold. With this selection the automatic tracking software measures the PFA
(Probability of False Alarm) and calculates the correct threshold for the optimum detection
performance.
3.10 Sector Blanking
Pressing the
I
button of fig. 3.1.2 the following window will appear:
Figure 3.10.1 Sector Blanking Settings
Two sectors are configurable to suppress the microwave transmission,
Sector 1
and
Sector 2.
The sector blanking is visible on the PPI with a sector delimited by two green lines (which
will be red during the setting) and, if the gain value is high enough, the absence of receiver
noise will be easily visible.