Channel Select Mode - Listen LR-5200-072 User Manual

Same Space If you are using transmitters in the same space, the most number of channels that will
work simultaneously is six wide band channels or 8 narrow band channels at 72 MHz, three wide band
channels or 5 narrow band channels at 216 MHz. With all of the transmitters off, listen for interference
on all the wide band channels via the headphone jack. Using the frequency compatibility tables on pages
21-22, eliminate any channels that have noticeable interference. Now choose the channels with the widest
channel spacing. It is recommended that adjacent channels be spaced at least 300 KHz. If there is no
interference the following channels are recommended: A, C, E, I, J, and H (wide band) or 1, 5, 10, 16, 21,
24, 31, and 35 (narrow band) for 72 MHz and 2A, 2K, and 2V (wide band) or 1A, 1C, 1F, 1N, and 1V
(narrow band).
Distributed Spacing If you are using transmitters that are spread out over space, you can achieve more
simultaneous broadcast channels. However, it is critical that your receiver(s) be located as close to its
transmitter as possible. You can use adjacent channels (see frequency compatibility tables on pages 21-22)
in this case as long as the adjacent channel transmitter is at least 50% further away from the receiver as
its transmitter. Example: The transmitter for the receiver on channel E is 100 feet from the receiver. The
adjacent channel transmitter on channel D should be at least 150 feet away.

Channel Select Mode

The Listen Button on your receiver has been programmed from the factory for Channel Select Mode.
This mode is especially useful for applications where users are required to select between active
channels (such as language interpretation or multiple classrooms), and you don't want them to have
to go through all available channels to find the appropriate channel. In this mode the button can be
programmed to increment only through the desired active channels in your facility and lock out all the
other unused channels.
In this mode when the Listen Button is pressed the unit will increment through the channel list to the
next programmed channel. For example if there are three channels programmed (English, Spanish and
German) and the unit is on the English and the button is pressed the unit will switch to Spanish. If the
button is pressed again the unit will switch to German and an additional press will take the unit back to
English again.
There are two modes to customize the channel list for the Listen Button. The two modes are Automatic
Channel Selection and Manual Channel Selection. These modes can be programmed using the unit or via
the IDSP Software Suite.
Your Listen receiver has been shipped to you with the Automatic Channel Selection, Auto 2 (channels E
and A) enabled for 72MHz or (channels 2C and 2V) enabled for 216 MHz.
l
L R - 5 2 0 0 R E C E I V E R M A N U A L PAGE 10