Either Way, the Result is PERFECT Patrol Speed
• The radar will never shadow.
• The radar will never batch.
• It tracks and acquires patrol speeds from 1-200 mph.
• Moving / Stationary selection becomes automatic.
• Patrol speed variations produced by weather effects are greatly reduced.
• Patrol speed variations produced by road clutter cosine effects are greatly reduced.
• Low speed combing effects are eliminated.
AUTOMATIC VSS CALIBRATION
Once the VSS cables are properly installed, the radar is ready to synchronize the vehicle’s VSS signal with the radar’s ground speed
readings. The calibration sequence will determine the proper ratio between the VSS signal speed and the radar ground speed. The
numeric result is stored in the radar’s memory (called a calibration factor).
Every time the radar is turned on and then operated, the auto-calibration routine is triggered. The very first time the radar is installed
and operated, the auto-calibration sequence may take a few minutes (since there is not a previously stored calibration factor to verify).
During successive operations, in the same vehicle, the auto-calibration routine will seem instant.
First Time Calibration (or Installing the Radar in a New Vehicle)
To auto-calibrate you will need to operate (with the radar transmitting) in the moving mode for a few city blocks. The radar can
complete the calibration sequence much faster if the speed of the vehicle is varied above 20 mph (don’t merely drive at a steady speed
at first). When you see the patrol speed window consistently showing an accurate speed, then the auto-calibration sequence has been
successful. If, after several blocks of driving, the patrol speed display is either blank or incorrect, then unplug the 6 pin VSS cable
connector, rotate it 180 degrees, power up the radar, and try again.
Automatic Moving / Stationary Selection
When the radar is receiving VSS signals, and it has been calibrated, the unit should automatically switch between moving and
stationary operation modes when the patrol vehicle moves and stops. While moving, the Radar Mode key will not override the
moving / stationary mode selected by the VSS steered radar. (Note: During the 5-minute tuning fork test the VSS is deactivated to
allow manual switching from stationary to moving mode.)
Low Speed Speedometer Problems
In some vehicles, the VSS signal is non-existent at speeds below 5-10 mph so you may see no change in the car’s speedometer reading
until the car exceeds 10 mph. In these cases, the Stalker DSR radar will also not be switched into moving mode until the patrol car
exceeds 10 mph.
Tuning Fork Tests with VSS
With VSS activated, the radar must be in the TEST mode prior to manually selecting moving mode.
NOTE: During the 5-minute tuning fork test, the VSS is deactivated to allow manual switching from stationary to moving mode.
Patrol Speed Low Cutoff
The 5
th
Menu option (see page 6) is Patrol Speed Low Cutoff or Lo5, Lo 20. Patrol 5/20 is overridden when VSS is activated.
PS Blank
Patrol Speed Blanking (see Page 14) has two functions. The function used to re-acquire patrol speed is not necessary with VSS
activated. VSS will insure the correct patrol speed automatically.
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