User Manual

33
4) While visual identification of the strongest target is straight forward, identification of the
fastest requires more attention and information. In a situation with a car passing a large
truck, the fastest window may show the speed of that vehicle or a much faster vehicle
somewhere else within the range of the radar. The fastest vehicle is selected without regard
to its signal strength. It cannot be assumed that the fastest is the second strongest target.
5) Range of fastest targets is fixed at a little under full. Changing range on the front panel
makes no change in fastest target range.
Description of the same direction mode
The BEE III allows the tracking of targets moving in the same direction as the patrol vehicle.
Because of the BEE III’s patented ASD
™
technology, same direction operation requires only a
little more attention from the operator than opposite direction. This mode is can be a little
difficult to use in heavy traffic where visual target identification is not as easy.
Operation of the same direction moving mode
Same direction moving mode is selected by pressing the Same button on the remote control when
the radar is in moving mode.
Explanation of ASD™ technology in same direction mode.
The BEE III’s ASD™ technology allows it to determine the difference between a target traveling
faster or slower than the patrol vehicle patrol.
With ASD™, a target running 10 mph slower than the patrol vehicle and a target running 10 mph
faster than the patrol vehicle do not produce the same signal at the radar antenna. It is true that
the Doppler tone generated in the speaker by each target corresponds to 10 mph. However, the
signals present in the antenna are different.
On the front antenna, a target moving slower than the patrol vehicle is actually getting nearer the
patrol vehicle, and it produces a return signal that is at a higher frequency than the transmitted
signal. Conversely, a target moving faster than the patrol vehicle is moving away from the patrol
vehicle, and it produces a return signal that is at a lower frequency than the transmitted signal.
{A rear antenna works oppositely, for example a target moving faster is getting nearer the patrol
vehicle, and produces a return signal that is higher in frequency than the transmitted frequency,
and a target moving slower is moving away from the patrol vehicle, producing a lower frequency
than the transmitted frequency.}
ASD™ technology can tell the difference between these two frequencies (whether it is higher or
lower than the transmitted signal). The BEE III then automatically determines if the target is
approaching or receding, and calculates the proper target speed.