Variable Gain Control; Vip Levels Related To Dbz - Honeywell PRIMUS 660 Pilot's Manual

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PRIMUS 660 Digital Weather Radar System
VIP Level
6
5
4
3
2
1

VARIABLE GAIN CONTROL

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The PRIMUS 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.
LOW VARIABLE GAIN SETTINGS CAN ELIMINATE HAZARDOUS
TARGETS.
Radar Facts
5-30
Rainfall rate in
mm/hr
Greater than
125
50 – 125
25 – 50
12 – 25
2.5 – 12
0.25 – 2.5

VIP Levels Related to dBZ

Table 5–7
WARNING
Storm
Category
Extreme
Intense
Very Strong
Strong
Moderate
Weak
dBZ Level
Greater than
57
50 – 57
45 – 50
40 – 45
29 – 40
13 – 29
A28–1146–111
REV 2