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The Beacon Transmitter (BTX) is the track side mounted part of the lap timing system.
Mounting the BTX
The narrow infrared beam emitted by the BTX should be aimed parallel to the road and at the same height above the road as the receiver in the vehicle. The transmitter mounting system should therefore be capable of height and tilt adjustment.
The spacing between adjacent transmitters must be a least 6 meters.
Coded infrared beam
Range up to 40 meter (130 ft) when used with BR2
LED in three colours indicating:
Fault or very low battery
External via a 12 volt rechargeable battery (10 Ahr capacity recommended)
Power consumption 70 mA typical
Case size 90 x 80 x 115 mm
Weight 260 gram