GHD
TM
& SCOUT
TM
USER’S MANUAL
25
The following table shows the effect that an
increasing angle has on a displayed speed.
Figure 7.3b
Actual and displayed speeds at antenna-to-target angles
Small angles (less than 10°) have little effect on accuracy. As the
angle increases, the displayed speed decreases. At 90°, the target
speed is 0—grossly incorrect.
7.4 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 vehicle blower fan. Changing the fan speed causes a
proportional change in the display speed. To correct this, relocate the
radar gun so it does not display spurious speeds or turn off the fan
motor.
7.5 Electromagnetic Interference (EMI)
Operating electric motors can produce EMI. EMI from power seats
or windshield wipers can also produce spurious target speeds. To
correct the interference, simply turn off its source.
