User Manual

Fastest mode may be tested by using the lower speed tuning fork as above and by placing the

ringing higher speed fork into the antenna beam at a greater distance since the fastest target

should be a weaker signal than the target. The Fastest button must be pressed and held on the

remote. The audio will switch to the fastest target when present. For example, for forks marked

35 mph and 65 mph, the target would read 35 (the closer fork) and the fastest window would read

65.

Moving mode tuning fork tests

Moving radar units are designed to acquire a patrol speed and look for target speeds that are faster

(opposite direction) or slower (same direction) than the patrol speed. These two speeds can be

simulated using tuning forks. The two forks are manufactured to vibrate at different frequencies.

One fork will be used to simulate patrol speed and the other target speed. In moving mode, the

speed printed on the target fork will not match the speed shown on the BEE III display. It will be

added to or subtracted from the patrol speed depending on the mode switch selections.

For opposite direction moving mode, the lower speed fork will simulate patrol speed while the

higher speed fork will represent the target. For same direction moving mode, the higher speed

will be the patrol fork while the lower speed will be the target.

To perform the tuning fork test, place the radar in Tuning Fork mode and strike the patrol fork

(lower frequency) on a hard nonmetallic surface. 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 continuing 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 approximately equal distance from the antenna.

For opposite direction moving mode, the radar should display the 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).

Testing the same direction moving mode with tuning forks is a little more difficult. The radar

will display the high-speed fork as the patrol speed. However, since a tuning fork vibrates in both

directions, the unit cannot determine whether it should add or subtract the low speed fork from

the high speed fork. Therefore, Tuning Fork mode turns off the direction sensing of the radar and

allows you to tell the radar whether to treat the target fork as approaching or receding.

To accomplish this, the Fastest button on the remote control is used. In Tuning Fork mode, the

BEE III assumes that the target is moving faster than the patrol speed. Therefore, with forks

marked 35 mph and 65 mph, the patrol would read 65 (high speed fork) and the target would read

100 (high-speed fork plus low speed fork). To test the other case, when the target speed is slower

than the patrol speed, press the Fastest button. This makes the radar momentarily subtract the

target speed from the patrol speed. With forks marked 35 mph and 65 mph, the patrol would read

65 (high speed fork) and the target would read 30 (high-speed fork minus low speed fork).