Advanced Program Features and Listen’s iDSP Software Suite
To manage the advanced program features on any of the iDSP™ receivers a windows based User
Interface (UI) software is required.
This software is available free of charge
from Listen Technologies. To download the
software log onto http://www.listentech.com/
support/software/idsp-software-suite/
and
follow the instructions.
With the UI software, direct communication
is provided via the Micro USB connection
on the receiver. Once connected the UI
software provides setup and adjustment of
the following functions of the LR-4200 receiver.
Note: A help file for the UI software is included
with the download and will provide detailed
instructions for set up and management of
all the advanced program features of the
LR-4200 receiver.
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Squelch
The purpose of squelch is to mute the audio output of the receiver when the signal from the
radiator(s) is turned off or the level is too weak to be received. Without squelch radio noise will
be heard in the earphone. The squelch on the receiver can be adjusted to mute the audio at
different signal strengths. There are 20 squelch settings. The lowest squelch setting (no squelch) is
“0” and the tightest squelch setting is “20”. Your Listen receiver has been shipped to you with the
squelch setting of 3.
When to Adjust Squelch Setting:
For maximum range the squelch setting should be set to a low level (0, 1, or 2). However when
setting the squelch level low radio noise will be heard in the earphone when the signal strength
is low.
If no radio noise is desired to be heard when the signal strength is low then set the squelch set-
ting to a higher number. When setting the squelch higher than 3 the receiver will have reduced
range due to the audio being cut off when the signal is low.
Channel Labels
The channel labels are displayed on the OLED status screen. The default is the channel number the
receiver has been programmed to receive, i.e. “CH-1”. Customization of this display can be created
to better identify the type of audio, for example CH-1 could be changed to display “Spanish” if the
receiver is used for language translation.
