6.5 Auto Speed Mode
In Auto mode, The JUGS Gun
™
automatically records and displays the
speeds without using the trigger. Simply pull the trigger twice to activate
Auto Mode. The lower left screen will change from “HOLD” to “XMIT.” The
recorded speed will show in the window for the length of hold time that
has been set. To return to trigger mode, simply pull the trigger once.
7. Serial Output
The JUGS Gun
™
has an RS232 communications port on the bottom of the
handle. Using a custom RS232 communications cable, you can connect
the radar and transmit data to display signs or to a PC for recording and
analyzing speed data. Figure 7 illustrates the location. The port format is:
ASCII, 1200 Baud, One (1) Start bit, Eight (8) Data bits, One (1) Stop bit, No
parity .
8. Performance Tips
Understanding potential radar interference and what to do when it occurs
can greatly increase the radar’s performance.
8.1 How Radar Works
Determining a target’s speed begins with the radar gun transmitting a
beam of microwave energy (radio waves) at an approaching or departing
object. When energy from this beam strikes an object, such as a baseball, a
small amount of the beam is reflected back to the antenna. The reflected
signal frequency shifts by an amount proportional to the speed of the
object. This is known as the Doppler effect. The radar device then
determines the object’s speed from the difference in frequency between
the reflected and transmitted signal.
Figure 7
Port location as shown on The JUGS Gun™
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