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PRIMUS
R
660 Digital Weather Radar System
A28–1146–111
REV 2
Radar Facts
5-30
VIP Level
Rainfall rate in
mm/hr
Storm
Category
dBZ Level
6 Greater than
125
Extreme Greater than
57
5 50 – 125 Intense 50 – 57
4 25 – 50 Very Strong 45 – 50
3 12 – 25 Strong 40 – 45
2 2.5 – 12 Moderate 29 – 40
1 0.25 – 2.5 Weak 13 – 29
VIP Levels Related to dBZ
Table 5–7
VARIABLE GAIN CONTROL
The PRIMUS
R
660 Digital Weather Radar variable gain control is a
single turn rotary control and a push/pull switch that is used to control
the radar’s receiver gain. With the switch pushed in, the system is in the
preset, calibrated gain mode. In calibrated gain, the rotary control does
nothing.
When the GAIN switch is pulled out, the system enters the variable gain
mode. Variable gain is useful for additional weather analysis. In the WX
mode, variable gain can increase receiver sensitivity over the calibrated
level to show very weak targets or it can be reduced below the
calibrated level to eliminate weak returns.
WARNING
LOW VARIABLE GAIN SETTINGS CAN ELIMINATE HAZARDOUS
TARGETS.