Download Stalker Speed Sensor User Guide - Mega-Tech

sending EE Format Requests and displaying the values returned from the Speed
Sensor. To stop the polling from the application, select “Stop Polling” from the same
menu.
The RS-485 model can only use handshaking methods since it is always a slave on the
link. It never sends data unless the controller asks for it. It can communicate using
Format EE polling as described above, but only if its address is 2. Refer to Section 4.3
for more detail describing how to check or set the Speed Sensor address.
The RS-485 model can also use the more flexible EA polling. With this method, the
controller sends an EA request as described in Appendix B, and the Speed Sensor
returns a single message of whatever Message Format is selected (A, A1, b, bE, S).
Since the EA request has address fields, the controller can poll any individual unit on the
link and get back a speed report from only that unit.
The Stalker Scoreboard application displays the speeds it receives in the speed
windows at the bottom of its main screen. Depending on the unit’s configuration and the
data format selected, the Speed Sensor reports live speeds, peak speeds, hit speeds,
the highest peak speed it has seen since it was turned on, and locked target speeds.
When the Target Type is set for Baseball or Carnival the peak speed appears in the
Pitch Speed window, the live speed in the Rolldown Speed window, the hit speed in the
Hit Speed window (not used for Carnival), and the highest peak speed in the Highest
Pitch Speed window. Remember that hit balls will fly away from the radar in a wide
range of angles. The speed of a line drive to center field will display more accurately
than a hit toward first or third base which will have a large angle error.
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