Clear-Com HME DX121 - Manual (Page 14)

10
Rear panel of Base Station
PRI SEC
switch
Interference Avoidance
Interference, which may be heard in a headset as popping sounds, may occur whenever other equipment such as
WI-FI systems, wireless DMX systems, other HME Base Stations, etc. use the same frequency band. If these
systems can be limited to one portion of the band, then the DX121 can be set to the opposite half of the 2.4 GHz
to 2.48 GHz band. To avoid this type of interference, set up the base stations for “split-band” operation by
selecting the upper part of the frequency range on one Base Station (or more), and the lower part of the
frequency range on the other(s) as follows:
• Turn on the Base Station power. An “8” will appear on the STATUS display for a few seconds.
• After the “8” disappears and the STATUS display is blank, press and hold the CLR/BND button and then,
while you are still holding the CLR/BND button, press and hold the REG button and wait until a L, H or A
appears, and then release both buttons.
• Press the CLR/BND button to cycle through parts of the
frequency band; L = Low end, H = High end and A = All.
Stop on the band that you want to select.
• Wait until “c” appears on the display.
NOTE: Base stations are shipped in the A (default) position.
Multiple Base Station Setup
This mode of operation can be used to expand the number of users communicating through multiple HME Base
Stations operating in the same portion of the 2.4 GHz to 2.48 GHz frequency band.
Primary and Secondary Base Station Settings
One Base Station must be designated as “Primary” while the others are designated as “Secondary”. You
can have only one primary and up to 3 secondary Base Stations. Secondary Base Stations are assigned
numbers 1, 2, or 3.
• Label the Base Stations as “Primary,” “1,” “2” and “3.”
• Start with every Base Station and COMMUNICATOR
®
power off.
• Locate the PRI SEC switch on
the rear panel of the Base Station.
• Set the PRI SEC switch to the PRI
position on the primary Base Station.
• Set the PRI SEC switch to the SEC
position on each secondary Base Station.
• If a Base Station has been set for interference
avoidance, it should be used as the primary
Base Station. The secondary Base Stations
will automatically be set to the same band
when they are initialized.