G3
™
User’s & Installation Manual
7/October/2020
53
The following table shows the eect that an increasing angle has on
a displayed speed.
Horizontal Angle Degrees
Actual
Speed
0° 1° 3° 5° 10° 15° 20° 30° 45° 60° 90°
Displayed speed:
50 km/h 50 49 49 49 49 48 46 43 35 25 0
65 km/h 65 64 64 64 64 62 61 56 45 32 0
80 km/h 80 79 79 79 79 77 74 69 56 40 0
90 km/h 90 89 89 89 88 86 84 77 63 45 0
100 km/h 100 99 99 99 98 96 93 86 70 50 0
110 km/h 110 109 109 109 108 106 103 95 77 55 0
Table 8.2.1b
Actual and displayed speeds at dierent antenna-to-target angles.
Small angles (less than 10°) have little eect on displayed speeds.
As the angle increases, the displayed speed decreases. At 90°, the
displayed target speed is 0 km/h.
8.2.2 Fan Interference
Fan interference is the most common form of interference that you
are likely to experience. It is caused when the radar measures the
speed of the motor vehicle blower fan. Changing the fan speed
causes a proportional change in the display speed. To correct this,
relocate the radar antenna so it does not display spurious speeds
or turn o the fan motor.
• FaninterferencecanbeproblematicinSameDirection
Mode and should be checked carefully.
8.2.3 Batching
In past years, some radar devices occasionally could not correctly
process speeds when the patrol motor vehicle was accelerating
or decelerating at unusually high rates. In these cases, radar
devices used an earlier speed to calculate the patrol speed, rather
than the current speed. The radar will display an incorrect target
speed, because it is using an incorrect patrol speed. With the DSP
algorithms the G3™ uses, this error will not occur.
To Next Page
Loading...