Listen Technologies LR-300 EN - Manual (Page 15)

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LR-500
LR-500 Operation Instructions
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Make Sure the Unit is On
Rotate the volume knob counterclockwise with an earphone or headset connected to the unit.
Listen receivers use the cable of the earphone or headset as a receiving antenna.
Be careful when turning the unit on - if you turn the knob too far you might get too much
volume in your earphone!
Test the audio
If a transmitter is broadcasting on that channel, you will be able to hear the audio. If the signal is
too weak, the audio will be muted (squelched).
Select a Channel
Select the channel to match the transmission channel by pressing the UP and DOWN buttons on
the receiver. Listen recommends the use of wide band channels.
At 72 MHz:
72 MHz receivers operate on 17 wide band channels and 40 narrow band channels.
Channels represented by letters on the display (i.e. A) are wideband channels;
channels represented by numbers are narrowband channels.
At 216 MHz:
216 MHz receivers operate on 19 wide band channels and 38 narrow band channels.
Channel numbers starting with a “2” are wide band; channels beginning with a “1” or “3”
are narrow band channels.
Refer to the Frequency Compatibility Tables (pages 47-48) for specific frequencies and
compatibility with other manufacturers.
Find an audio transmission using SEEK
Another way to find a channel on the LR-500 is to use the SEEK button. When you do this, the Listen
receiver looks for the next active channel. Sometimes the unit will mistake interference for a real
broadcast signal. If you get interference, press the SEEK button again. The unit may stop on a
channel that is close to the actual broadcast channel, in which case the channel will sound noisy
or distorted. Simply press SEEK again until you find the clearest operating channel.
Adjust the volume control
Use the control dial on the top of the unit to adjust the volume to a comfortable level.
Volume Control Dial