MoTeC BR2 BTX - Manual (Page 37)

MoTeC Appendices 35
Sent once per Beacon event.
BR2 Detector Background
Indicates the average output of the receiver and is the signal level required to
overcome background noise. This automatically increases in a noisy
environment and decreases as ambient noise levels decrease. Typically
around 2.5V
BR2 Latest Detector Peak
Indicates the peak amplitude reached for the beacon currently being received
or 0 if no current beacon
BR2 Detector Peak
The peak amplitude of the beacon pulses detected by the receiver during the
detection window at the time that the signal is considered a valid beacon
signal.
Sent once per Beacon event.
BR2 Bias
This channel gives an indication of the total infra-red load on the detector.
This is typically around 2.5V but may increase to around 9V with direct
sunlight.
BR2 Trigger Threshold
The threshold currently in use for detecting beacon pulses. Typically around
0.05V and increases with vehicle noise. If this level gets too high then the
range is reduced. An internal error is generated if this level is high enough to
reduce the BR2 range below the minimum specified.
BR2 Secondary Threshold
Not used
BR2 Noise Bits
The number of noise pulses received so far. This may increase rapidly if an
unknown IR source is transmitting towards the BR2 or a weak signal is being
received.