Telex TR-1, BTR-1 User Manual

BTR-1 & TR-1

UHF-Synthesized Digitally Encrypted Wireless Intercom System

The Telex RadioCom BTR-1 UHF wireless intercom system is the ultimate in reliable, high performance, encrypted full duplex
communications.
The BTR-1 system includes the BTR-1 frequency-agile base station and a TR-1 frequency-agile beltpack. The BTR-1 system
provides full duplex, encrypted digital communication. The base station provides the beltpack with access to a six-intercom port
matrix of two-wire systems or communication to a four-wire intercom system. The system can interface with Telex Audiocom,
RTS Two-Wire Intercom, Clear-Com two-wire intercom systems as well as four-wire communication systems. In addition to the
two- and four-wire intercom systems the base station provides connections for auxiliary balanced audio input and output, as well
as relay closure and the ability to use one of the six intercom lines as a wireless only communication intercom. The system is

also perfectly suited for stand-alone operation. The BTR-1 has been designed for reliable, efcient operation. Operating in the
482 to 746 MHz range. The unit has expansion ability to add dozens of base stations to create a system. The high-efciency

TR-1 beltpack provides up to 9 hours of uninterrupted operation using standard alkaline batteries.

Features

Frequency Agile Base Station & Beltpacks

No external computer/device required to select
frequencies

Telex Communications proprietary digitally encrypted
wireless communication between the base station &
beltpack.

AC or DC Operation in the 12 to 15 Volt Range Backlit
Base Station LCD

The frequencies of a beltpack may be changed at the
beltpack or from the base station.

Line Drawing

Six channels of Two-Wire Intercom

Compatible with Audiocom (Telex), RTS-TW, Clear-Com,
RTS Matrix and other wired intercom types.

Relay contact closure on the base station that can be
activated from the beltpack.

ClearScan Function

Base stations are table or rack mountable.

Three-channel intercom access from beltpack

BTR-1 & TR-1 Specications

Overall
RF Frequency Range

482 - 608 MHz, 614 - 746 MHz in 18 MHz TX and RX
bands

BTR-1 Power Requirements

12-15 volts AC/DC @ 1 Amp

TR-1 Power Requirements

6 “AA” Cells Alkaline (NiMH optional)

Temperature Range

-4° F to 130° F (-20° C to 55° C)
TX Antenna
BTR-1: ½ wave (supplied), TNC Male Connector
TR-1: ¼ wave (supplied), Screw type Replaceable

RX Antenna

BTR-1: ½ wave (supplied), TNC Male Connector
TR-1: ¼ wave (supplied), Screw type Replaceable

FCC ID

BTR-1 (B5DM519), TR-1 (B5DM520)

Frequency Response

100 Hz - 4.0 kHz

4-Wire Input and Output

Level Adjustable (2 Vrms typical)
Telex Intercom

Input/Output Level Adjustable (1 Vrms typical), Line

Impedance 300W
RTS Intercom

Input/Output Level Adjustable (0.775 Vrms typical), Line

Impedance 200W
Clear-Com Intercom

Input/Output Level Adjustable (1 Vrms typical), Line

Impedance 200W
Auxiliary Input
Level Adjustable (2 Vrms typical)
Auxiliary Output
Level Adjustable (2 Vrms typical into 600W)
Microphone Input Sensitivity
BTR-1: 10 mV (200W Source)
TR-1: 7 mV (200W Source)
Local Headset Output
200 mW output into 150W (1% Distortion)
Mute of Wire Income Port
100 dB (30 kHz Low Pass Filtered)
TR-1 Current Draw

190 mA (Push-to-Talk, Talk On)

Transmitter
Type

Synthesized Transmitter, 720 channels
Transmit Power
50 mW typical (High), 5 mW typical (Normal)

Modulation Type

GMSK

Deviation

Complies with FCC 74.861
RF Frequency Stability

0.005%
Radiated Harmonics & Spurious

Exceeds FCC specications

Receiver
Type

Dual Conversion Superheterodyne, 720 channels each
RF Sensitivity

<0.8 μV for 12 dB SINAD

IF Selectivity
3 dB at 230 kHz
Image Rejection
70 dB or better
RF Frequency Stability

0.005%
Distortion
<1% at peak level
S/N Ratio out to wired Intercom Ports
80 dB (30 kHz Low Pass Filtered)

Product Dimensions/Weight
BTR-1

8.25”W x 1.72”H x 9.00”D (20.9cm x 4.4cm x 22.9cm),
3 lbs 8 oz (1.59 kg)
TR-1

3.75”W x 1.65”H x 5.10”D (9.5cm x 12.9cm x 4.2cm),
15 oz (425g) with alkaline batteries

Shipping Dimensions/Weight
BTR-1

12”W x 4”H x 16”D (30.48cm x 10.16cm x 40.64cm),
6 lbs 3 oz (2.86 kg)
TR-1
7”W x 4”H x 14”D (17.78cm x 10.16cm x 35.56cm),
1 lb 4 oz (.635 kg)

Contact Information

Telex Communications, Inc.
12000 Portland Avenue South
Burnsville, Minnesota 55337
Telephone: [phone]
Fax: [phone]

Form Number: LIT000267000 Rev A
Date: August 2008

Ordering Information

BTR-1

UHF-Synthesized Digitally Encrypted Base Station
Transceiver
Catalog Number: 71897XX

TR-1

UHF-Synthesized Digitally Encrypted Beltpack
Transceiver
Catalog Number: 71898XX

This specications information is preliminary and is subject to change without notication.

Brand names mentioned are the property of their respective companies.