Applied Concepts Inc ACMI006 Manuale Utente
A Patrol vehicle is parked at the top of a hill monitoring approaching
traffic with his rear antenna. The first target, a 60 mph truck, is the
strongest out-front target and appears in the target window (Fig 29).
The third target, the 72 mph Faster sports car, is tracked in the middle
Faster window. The Faster target can be locked by pressing the
LOCK key when it becomes the strongest target.
traffic with his rear antenna. The first target, a 60 mph truck, is the
strongest out-front target and appears in the target window (Fig 29).
The third target, the 72 mph Faster sports car, is tracked in the middle
Faster window. The Faster target can be locked by pressing the
LOCK key when it becomes the strongest target.
S
XMIT FRONT
REAR
SAME SLOW
FAST
LOCK
TARGET
PATROL
Fig 29
SAME LANE THEORY
Same Lane Operation
1. To transmit, press the XMIT/HOLD key. The XMIT icon should appear on the display indicating a radar signal is
being transmitted.
2. Select moving mode by pressing the MOV/STA key on the remote control. When S
PATROL
is in moving
mode, the patrol window will contain either the patrol speed or a [ ]. The [ ] indicates that S
PATROL
is in
moving mode, but has no ground speed. Be sure the patrol speed indicated corresponds to the speedometer of the
patrol vehicle.
patrol vehicle.
3. Then select same lane mode by pressing the SAME/OPP key. Same lane mode is selected when the SAME icon is
visible.
4. If a target is in the radar beam, its speed will appear in the target window and a Doppler audio tone will be heard from
the speaker.
5. Patrol speed is especially important while operating in the same lane moving mode. The patrol vehicle should be
traveling slower or faster than all targets in the radar beam. Normally, traveling slower than all same lane targets is
recommended. After visually estimating the speed of the targets in the radar beam, press the SLOWER key to
correspond to whether the observed targets are traveling faster or slower than the patrol vehicle. The SLOW icon
indicates that the target is traveling slower.
recommended. After visually estimating the speed of the targets in the radar beam, press the SLOWER key to
correspond to whether the observed targets are traveling faster or slower than the patrol vehicle. The SLOW icon
indicates that the target is traveling slower.
6. To verify that the SLOWER key is in the right position, change the speed of the patrol vehicle by 2-3 mph, observing
that the displayed target speed does not change.
Example
Doppler Signal Processing
Two signals must be processed to determine target speed. The first signal,
patrol speed, results from the radar signal reflecting from passing stationary
objects. The Doppler shift of this signal will be proportional to the speed of
the patrol vehicle, since Doppler shift is proportional to the relative velocity
between the radar and the passing reflecting objects.
patrol speed, results from the radar signal reflecting from passing stationary
objects. The Doppler shift of this signal will be proportional to the speed of
the patrol vehicle, since Doppler shift is proportional to the relative velocity
between the radar and the passing reflecting objects.
Patrol Speed = 55 mph
The second signal, difference speed, results from the radar beam reflecting
from a slower or faster same lane moving target and then returning to the
patrol vehicle. The Doppler shift of this signal will be proportional to the
difference speed between the patrol and target vehicles. The audio tones heard
while in same lane mode are directly related to this difference speed.
from a slower or faster same lane moving target and then returning to the
patrol vehicle. The Doppler shift of this signal will be proportional to the
difference speed between the patrol and target vehicles. The audio tones heard
while in same lane mode are directly related to this difference speed.
Difference Speed = 10 mph
The radar is unable to distinguish between a difference speed resulting from a
faster or slower target. The operator must tell the radar how to process this
signal by pressing the SLOWER key. If the target vehicle is moving faster
than the patrol vehicle, the difference speed must be added to patrol speed to
obtain target speed. If the target vehicle is moving slower than the patrol
vehicle, the difference speed must be subtracted from the patrol speed to obtain
target speed.
faster or slower target. The operator must tell the radar how to process this
signal by pressing the SLOWER key. If the target vehicle is moving faster
than the patrol vehicle, the difference speed must be added to patrol speed to
obtain target speed. If the target vehicle is moving slower than the patrol
vehicle, the difference speed must be subtracted from the patrol speed to obtain
target speed.
For faster target:
Target = 55+10 = 65
For slower target:
Target = 55-10 = 45
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