Telex PST-170 - Manual (Page 5)

The second jack is the microphone input. This jack is located
on the top panel “step” of the transmitter. The microphone is
supplied with the transmitter but other types can be used as well.
Frequency/Channel Considerations
As with any radio device, interference can occur at any time.
The frequencies offered are shared with other legitimate us-
ers. Check the frequency/channel with a receiver to see if
any interference is present. If interference is present, choose
a different channel. The severity of interference varies with
location and distance to the interfering station. If the interfer-
ence is weak on all channels, this is probably acceptable
since the PST-170 will cover the interference and is unlikely
to interfere with other users. Multiple Channel Systems re-
quire other considerations but each channel should be
checked as above.
-4-
SET
-dB
E.D.R.
OFF
SET
SWITCH
BUTTON
SWITCH
BUTTON
MICROPHONE
JACK
ANTENNA
POWER
SWITCH
Top View