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it is farther away from the sensor win-
dow or off to the side of the sensor win-
dow. If adjusting the level down makes
no change, or makes operation even
worse, return the level to the full power
position (clockwise). Then,
try moving the
IRC-1 closer to the sensor window or try to
point the L.E.D.'s more directly at the sensor
window.
Optical IR Feedback Loop
If there is an IR sensor and an IR flasher
located within the same room—an "optical
IR feedback loop" can occur. This occurs
when the IR output from a flasher uninten-
tionally reaches an IR sensor located with-
in the same room. The IR commands are
eventually forwarded back to the IR flasher
and the whole process endlessly repeats
itself. This effect is similar to acoustical
feedback (the howling or whistling sound
heard in a P.A. system when the micro-
phone is placed too close to the speaker).
The optical IR feedback loop can be elimi-
nated by one of the two following methods.
1. Reduce the flasher output until normal
operation resumes. This is done by turning
12
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