The use of the tuning fork is to verify the accuracy of the radar gun, Sports Radar Ltd.’s radar guns have a fixed front end and have no way to calibrate with external items. If you suspect the unit is out of calibration it must be returned to the factory for servicing.

 

The tuning forks are only for reference, not intended as a calibration tool. The frequency that the tuning fork produces (and the radar gun sees) can vary due to many factors, mostly physical like the particular material used within the lot produced, or dimensional variations due to the manufacturing process tolerances.

 

The Sports Radar guns have no method to calibrate the speed registered, they use a crystal frequency base, and is much more accurate than the tuning fork.

 

Turn radar unit on, either in continuous mode or trigger mode.

Firmly strike the tuning fork on a hard surface so that the tuning fork rings a steady tone.

With the tuning fork ringing, hold the tuning fork steady approximately 4-6” in front of the radar unit, if the radar unit is in trigger mode pull trigger.

The Radar unit should display a speed of 54-56 for a 55mph X band tuning fork, or 63-67mph for a 65mph X band tuning fork.

If the radar unit reads below or above these speeds contact Sports Radar for additional help.

There are two different looks for the tuning forks both work the same.

 

The reason for the +/- 2mph is because the tuning forks are not calibrated depending on how you hold the tuning fork and how hard or soft you strike the tuning fork, the ringing produced can vary.