Operation Instructions - Listen Technologies LR-500 User Manual

LR-500 Operation Instructions
1
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!
2 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.
150 MHz:
150 MHz receivers operate on 6 wide band channels and 26 narrow band channels.
Channels 1-6 are Wideband & channels 7-32 are Narrowband.
Refer to the Frequency Compatibility Table (page 35) for specific frequencies and
compatibility with other manufacturers.
Test the audio
3
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).
Find an audio transmission using SEEK
4
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
5
Use the control dial on the top of the unit to adjust the volume to a comfortable level.
Volume Control Dial
11