CHAPTER 15
Three Band Base Stations
Identifying a Three Band Unit
Three band base stations normally have a 18 MHz wide receive
range of 650-668 MHz. These three band base stations are
designated by having a 3 in the second digit of the two digit
band code that is on a label on the rear panel of the unit.
Regulatory Changes and the Three Band
There are two channel map configurations in a three band base
station. One for the US/Canada and one for the rest of the world.
At one time (before October, 2018) there was only one channel
map for a three band unit, but due to regulatory changes in the
US/Canada an additional map was produced and installed in
three band base stations. The result of the FCC incentive auction
in regard to wireless intercom was the following:
•
Only 10 MHz (653-663 MHz) may be used for wireless
intercom in the range 616 MHz to 698 MHz.
•
Three band beltpack transmit power must be reduced to
20 mW EiRP for US/Canadian units.
Since the three band units are made for worldwide customers
the 18 MHz range is the default shipped, therefore a US/
Canadian user must set a base station to the new US channel
map in order for the base’s channel map to match the US three
band beltpack’s channel map. The US three band beltpacks only
have the new US channel map in them.
NOTE:
Only US/Canadian users of a three band base
station need to change the channel map of the base
station to the US channel map!
Changing Channel Maps
A three band base station may be changed from a normal
channel map to a US channel map and back again with the press
of a couple buttons. The current channel map setting is
remembered by the unit even if power is removed.
1.
At the base station’s main operating screen, press and hold
the [SET]+[UP] buttons until the switching band text is
displayed.
The three band map the unit is switch to is displayed.
2.
Release the buttons when the switching three band text is
displayed.
The unit reboots and displays one of the following channel
map versions.
x30001 = Normal three band channel map
x3U001= US three band channel map
(where x is the current transmit band of the base station.
Содержание BTR-800
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Страница 6: ...8 Introduction BTR 800 TR 800 TR 825 FIGURE 1 BTR 800 Block Diagram...
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Страница 80: ...82 Intercom Systems Specifications BTR 800 TR 800 TR 825...
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Страница 88: ...Bosch Security Systems Inc 12000 Portland Avenue South Burnsville MN 55337 U S A www rtsintercoms com...
