by raceamerica » Tue Oct 02, 2018 9:31 am
RaceAmerica Wireless Speed Traps are standalone speed traps utilizing a T-Link2 trap with two beam emitters and two tracks sensors. In the standalone configuration, the speed trap display is the master controller polling the T-Link. The T-Link responds to the master poll with the current status of the trap and the last known speed measured. Each time the display polls the T-Link, the most current information is sent and if a speed is valid and available, the display displays the trap speed. The display also will display a bottom leftmost segment or a decimal point (depending on which display model) to indicate the trap is busy measuring a speed.
Normal speed trap operation will lockout the speed trap for about 4 seconds when one of the beams was tripped and display the 'trap busy' indicator. Once a speed is displayed, the trap is disabled for about 9 seconds, then clears the display and the trap is ready to measure the next speed.
When PC software is added, a T-Link IDZ unit is also added and connected to the PC enabling the PC to now act as the master controller. There can only be one master so the display must be switched into slave mode by setting the appropriate DIP switch inside the display. The display in slave mode listens for the T-Link and processes the speed as usual. All polling is now handled by the T-Link IDZ unit connected to the PC. To switch back to standalone mode without the PC, the DIP switch inside the display must be reset back to its factory setting making it the speed trap display the master again.