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.

SET SWITCH

SWITCH BUTTON

BUTTONANTENNA

MICROPHONE

JACK

SET

-dB

E.D.R.

OFF

POWER

SWITCH

Top View

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.

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Telex PST-170 manual Frequency/Channel Considerations