Niles TS120 Installation Manual page 6

INSTALLATION CONSIDERATIONS
(CONTINUED)
RECEIVING RANGE AND PICKUP ANGLE
The receiving range of the TS120 will vary according to the IR output strength of the remote control
being used. Remote strength varies among brands depending on the number and size of batteries
used, and how many IR emitters the remote has. For example, remotes that operate on two small
AAA batteries and have only one IR emitter are generally not as strong as remotes that use the
larger AA size batteries and have two emitters. Tests with various manufacturers' remote controls
have shown that the operating range can vary from a minimum of 20' to a maximum of about 35'.
Infrared signals travel essentially line-of-sight. They will not pass through or around solid objects. Do
not rely on an IR signal being able to "bounce" off a wall or object to the TS120. The IR pickup angle
of the TS120 is 30° off-axis (horizontal and vertical) at 25'.
AVOIDING ELECTRICAL INTERFERENCE
Avoid locating the TS120 near any potential sources of electrical or optical noise, such as light
dimmers, low-voltage lights, and neon lights.
AVOIDING OPTICAL FEEDBACK
If installing the TS120 in the same room as an IR flasher, it is possible for the flasher's IR output
to be picked-up by the TS120. This effect, known as an optical feedback loop, can cause erratic
operation. Optical feedback is similar to acoustical feedback: the howling or whistling sound heard
in a P.A. system when the microphone is too close to the speaker.
To avoid optical feedback:
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