Applied Concepts Inc ACMI006 Manuale Utente

Hold mode can be selected by pressing the XMIT/HOLD key on the 
remote control.  In hold mode, the XMIT icon will be off 
(Fig 8) and no signal will be transmitted.  This prevents detection by 
radar detectors.  When in hold, S 

remembers the last 

patrol speed and looks for that speed first when changing from hold 
back to transmit. 
NOTE: While operating in VSS  mode (see section titled “VSS 
OPTION” on Page 21) the radar uses the presence (or absence) of 
VSS pulses to automatically switch between moving mode and 
stationary mode. 

Fi 8 

g 

 

 

Perform the tuning fork test on the radar before using for traffic 
measurements.  See page 20 for instructions on this procedure. 

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. 

To transmit, press the XMIT/HOLD key.  Select same lane moving 
mode by pressing the MOV/STA key, then select same lane mode by 
pressing the SAME/OPP key.  Same lane mode is selected when the 
SAME icon is visible (Fig 9). Note: When Same Lane is selected, the 
sensitivity is automatically reduced internally by software. A 
sensitivity setting of 4 is recommended in Same Lane. 

If a same lane target is in the radar beam, its speed will appear in the 
target window and the difference speed audio will be heard from the 
speaker.  The target speed is obtained by adding the difference speed 
to the patrol speed.  Fig 10 is an example of a patrol speed of 50 and a 
faster same lane target in front of the patrol vehicle traveling at 68.  
The target speed is continually measured and displayed and the 
Doppler audio tone is heard while the S 

is in 

transmit mode and a target is present. 

 

Fig 9 

 

Fig 10 

For targets in the radar beam that are traveling slower than the patrol 
vehicle, it is necessary to press the SLOWER key. Fig 11 is an 
example of a patrol speed of 50 and a slower same lane target in front 
of the patrol vehicle traveling at 48. 
NOTE:    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. 

 

Fig 11 

Traditional radar units exclude patrol speed lock-on and tracking below 20 mph. One of the unique features of S 

is that it allows patrol speed lock-on and tracking below 5 mph, when the low-end patrol speed is set to 5.  This 

feature is very popular and is excellent for enforcing school zones.  However, with this setting, S 

is more 

prone to "shadowing."  Shadowing occurs when a strong same lane target in the radar beam captures the patrol speed, 
instead of the weaker passing ground reflection.   

The following is an example of the shadowing effect:  A patrol vehicle traveling 30 mph is following a pickup traveling  
42 mph.  The pickup is pulling away from the patrol vehicle at 12 mph.  The radar, in error, thinks this 12 mph speed is the 
correct ground speed and displays 12 mph in the patrol window, instead of the correct value of 30 mph. 

 

has three options for eliminating the shadowing effect:  (1) make the unit re-acquire the correct patrol 

speed by pressing the PS BLANK key, (2) change the low-end patrol speed from 5 mph to 20 mph (see following 
paragraph for instructions), and (3) operate the radar using the optional VSS mode.  To eliminate the shadowing effect in 
the city, option (1) is recommended.  Option (2) is recommended for highway radar use. Option 3 eliminates all shadowing 
and is achieved by installation of VSS cabling in the patrol vehicle.

 

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