Telex PST-170 - Manual (Page 4)

Transmitter Channel
The PST-170 Transmitter may be set to any one of 17 channels.
Two Transmitters cannot operate on the same channel un-
less separated by 300 feet (91 m) or more (which is the aver-
age maximum operating range). If two transmitters are
operating on the same channel inside this perimeter, the re-
ceivers will pick up the FM signal of both transmitters, caus-
ing a squealing sound to be heard.
Antenna
The transmitter uses a flexible wire “trailing” antenna that is
permanently attached to comply with FCC Part 15 Rules. Do
not cut or lengthen the antenna. Do not coil the antenna and
place in your pocket. This is a tuned antenna and modifica-
tion will shorten the range.
Audio Input
There are 2 audio input jacks on the transmitter. One is the
Auxiliary input designed to allow audio devices such as
teachers aids or tape players to be used. The input jack is a
1/8 inch (3.5mm) stereo/mono jack. Typical input level is 100
mV RMS maximum for normal modulation. More than this in-
put will cause the audio to “limit” which may sound unnatural.
Reduce the input level, if this should happen, by turning
down the input device.
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