Telex BTR-800 Owner's Manual

Telex Model BTR-800 Base Station
Owners/Users Manual (Preliminary Information)
General Description
The Telex Model BTR-800 is a part of the RadioCom ™ wireless intercom
series providing all of the Base Station functions.
The BTR-800 Base Station is a four channel receive and a two channel
transmit unit operating within the 518-608 and 614-746 MHz range (TV
Channels 22 to 59). Each base transmitter operates on selected frequencies
in the lower half of the frequency range and the receivers operate on selected
frequencies in the upper half of the frequency range.
The primary transmit frequency is used to transmit voice signals to all four
of the TR-800 portable (beltworn) units. The secondary transmit frequency
is used either as a second independent voice or signaling frequency. Each
transmitter is a full power unit (not a sub-carrier) that is fed to a power
combiner in order to reduce the number of antennas required for transmit.
Each of the base station receive frequencies are used to receive
transmissions from each portable unit. Full Duplex (telephone type)
operation is used and any portable can talk to any other portable or, any or
all of the base receivers can be deselected allowing the mobiles to monitor
only. Independent receive channels can be enabled or disabled by front panel
Pushbuttons. The presence or absence of a portable transmit is displayed on
the LCD Display.
Two independent 2 wire or 4 wire intercom units can be connected to the
base station. Each intercom has independent input and output level
adjustments.
An Auxiliary connector is provided for general audio use and also has input
and output level controls.
A local headset connector is provided with volume, audio channel A/B or
both, microphone gain control and a talk switch.
A front panel readout on the base station indicates the frequency or channel
that is in current use. A separate menu is used to select one of several