User's Manual

To perform the tuning fork te st, strike the patrol fork on a hard nonmetallic surface and hold the

ringing fork in a fixed position two or three inches in front of the antenna with the narrow edge of

the fork facing the antenna. The speed will be shown in the patrol window. While co ntinuing to

hold the ringing fork in place, strike the other fork and hold it next to the patrol speed fork. Both

forks must be vibrating while being held an equal distance from the antenna.

For opposite direction moving mode, the radar should display th e low speed fork as patrol and the

difference between the forks as the target speed. For example, for forks marked 35 mph and 65

mph, the patrol would read 35 (low speed fork) and the target would read 30 (high -speed fork

minus low speed fork).

For same direction moving mode, the radar should display the high -speed fork as patrol and the

sum of the forks as the target speed. For example, for forks marked 35 mph and 65 mph, the

patrol would read 65 (high speed fork) and the target would read 100 (high spe ed fork plus low

speed fork).

For same direction moving mode with slow mode selected, the radar should display the high -speed

fork as patrol and the difference between the forks as the target speed. For example, for forks

marked 35 mph and 65 mph, the pa trol would read 65 (high -speed fork) and the target would read

30 (high-speed fork minus low speed fork).

Harmonic detection

In moving mode, the BEE III receives a large reflection from the road, which is used to compute

the patrol speed. Some situation s, such as when guardrails or large signs are present, cause the

signal to be excessively large. This can sometimes cause a harmonic frequency of twice the patrol

speed to appear. These signals would normally be displayed as a target with a speed equal t o the

patrol speed and prevent the BEE III from reading the speed of real targets, but harmonic detection

circuitry inside the BEE III inhibits this. Unfortunately, the harmonic detection circuitry also may

reduce the range of actual target vehicles that are moving at the same speed as the patrol vehicle.

This is normal and can be avoided by patrolling at a different speed than the offending targets.

Range and radar placement

The range of the radar is influenced by how it is mounted in the vehicle. Hea ter fans are moving

targets and will be picked up if energy from the antenna is reflected toward the fan. The best

solution to this problem is to find a location that minimizes this effect. To determine this location,

place the unit in stationary mode, t urn the volume up, and open the squelch. This lets any target or

interference be heard. If changing fan speeds changes the audio signal, the fan is being picked up

in that mounting position; try to find a different location. Reducing the fan speed may a lso reduce

the problem. Reducing the range setting of the radar will also reduce the problem. If you have

persistent problems with the BEE III reading the fan speed, call the factory for suggestions specific

to your particular vehicle.