
System Operation
This section describes the different system configurations of the
BTR-240 base station and the TR-240 beltpacks.
NOTE: For all system configurations, the TR-240 battery packs
should be fully charged. Refer to the Battery Charging
Instructions in Section 4.
Wireless Mode
The most common configuration for the BTR-240 system is the
wireless mode configuration, shown in Figure 7-1. In this set-up,
the BTR-240 base station serves as the “relay” and provides
wireless coverage for up to 8 full-duplex beltpacks in wireless
mode.
Set-up
1. Select a location for the BTR-240 base station and connect
the power cord and antennas.
•
When using omni-directional antennas, place the base
station as close to the center of the coverage area as
possible.
2. Connect base station to external audio interfaces. For
example: 2-wire, 4-wire, Auxiliary, Speaker, local headset.
3. Turn on the base station.
•
The menu buttons and LCD backlight illuminate and a
progress bar displays the status while the unit is booting.
•
After approximately 25 seconds, the base station will
have completed the boot cycle and the Status Screen will
be displayed.
•
Activate the connected audio interfaces by navigating
the menu on the LCD screen.
4. Perform a ClearScan.
•
After the base station has completely booted, press and
hold the <MENU> + <SET> buttons for approximately 3
seconds.
•
The base station will run the ClearScan operation and
select the optimal RF channel for operation.
5. Plug headsets into the TR-240 beltpacks and turn them on,
one by one.
•
If the beltpack has not been previously set to wireless
mode, press and hold the <TALK> button while the
beltpack boots.
•
Allow a few seconds between each beltpack power on.
•
After approximately 20 seconds, a voice prompt will
announce “wireless” in the beltpack headphones
indicating that wireless communications has started.
•
The base station will increment the association status on
the Status Screen next to “Assoc: XX” for each of the
active full-duplex beltpacks.
Wireless Capacity Limit
Up to 8 full-duplex wireless beltpacks can be used with a single
BTR-240 base station for reliable and uninterrupted
communications on a clear RF channel. Many more half-duplex
beltpacks can be used.
If a BTR-240 base station is loaded beyond its capacity limit, the
usability becomes highly subjective. Users will begin to
experience drop outs and potentially delays in the audio.
For example, a BTR-240 base station has 6 full-duplex wireless
beltpacks and 28 half-duplex beltpacks. If 2 of the half-duplex
beltpacks became full-duplex at the same time, the system will
still be operating within the system limitations. If 4 of the
half-duplex beltpacks were to become full-duplex, for a total of
10 full-duplex beltpacks, then the system would be operating
beyond its loading limit and the users will begin to experience
audio drop outs and potentially delays in the audio.
NOTE: The capacity limit may not be achieved if there is
interference on the RF channel of operation. For further
details, refer to Wireless Interference in Section 10.
Section 7 - System Operation
TALK
CHANNEL
SELECT
VOLUME
BTR-240
POWER
menu
set
Figure 7-1
Eight Beltpacks in Wireless Mode
7-1
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