Telex RadioCom BTR-800-H1 User manual

Telex
Operating Instructions
RadioCom™
BTR-800, TR-800, TR-825
Professional
Wireless
Intercom System
0891

Thank you for choosing RadioComTM
Telex Communications would like to take this opportunity to thank you for choosing the RadioCom™BTR-800
Professional Wireless Intercom System. Many of the features in this product are the result of years of develop--
ment work with many of the features developed from customer feedback. We hope that your experience with this
product is a pleasant one and hope to provide you with a continuing line of RadioCom™products well into the
future. In order to get the most out of your new wireless intercom system, please take a few moments to look
through this booklet before using the product for the first time.
-Telex Communications, Inc.

Table of Contents
Introduction ..........................................................................1-1
General Description ..........................................................................1-1
System Features .............................................................................1-1
BTR-800 Block Diagram......................................................................1-2
BTR-800 Base Station ..................................................................2-1
Controls and Connections - Front Panel ..........................................................2-1
Controls and Connections - Rear Panel ...........................................................2-2
BTR-800 Specifications.......................................................................2-3
TR-800 Beltpack.......................................................................3-1
Controls and Connections - Top Panel............................................................3-1
Controls and Connections - Rear Panel ...........................................................3-2
TR-800 Specifications ........................................................................3-3
TR-825 Beltpack ......................................................................4-1
Controls and Connections - Top Panel............................................................4-1
Controls and Connections - Rear Panel ...........................................................4-2
TR-825 Specifications ........................................................................4-3
Initial Equipment Set-Up ...............................................................5-1
Unpacking .................................................................................5-1
Antenna Connections.........................................................................5-2
Antenna Polarization .........................................................................5-2
Distance Between Antennas ...................................................................5-2
Antenna Placement ..........................................................................5-2
Improving Reception/Increasing Range ..........................................................5-4
Base Station Set-Up .........................................................................5-5
Location ...............................................................................5-5
Power Connection........................................................................5-5
Transmit Switches........................................................................5-5
Internal Transmit Switches .................................................................5-6
Intercom Switch .........................................................................5-6
Intercom Interface........................................................................5-6
Dual Listen Functionality ..................................................................5-8
Auxiliary Input/Output ....................................................................5-9
Internal Auxiliary Input Routing Switch ......................................................5-9
Stage Announce /Relay Contacts ...........................................................5-10
Base Station Link .......................................................................5-11
Beltpack Set-Up ...........................................................................5-12
Battery Installation ......................................................................5-12
Antenna Connection .....................................................................5-13
Transmit Mode .........................................................................5-13
Headset Connection .....................................................................5-13
Pre-Walk-Thru Checklist ...............................................................6-1
System Operation......................................................................7-1
Frequency Plan Overview .....................................................................7-1
Factory-Defined Group .......................................................................7-1
User-Programmable Groups ...................................................................7-1
System Quick Start ..........................................................................7-1
Base Station Operation ......................................................................7-2
Power .................................................................................7-2
Local Headset ...........................................................................7-2
Portable Station Connect ..................................................................7-2
Intercom A and B ........................................................................7-2
Auxiliary...............................................................................7-2
Display Contrast .........................................................................7-3
BTR-800 Menu Structure.................................................................7-4
Main Screen Flowchart .................................................................7-4
Power-Up Screen ......................................................................7-5
Operating Screen ......................................................................7-5
Beltpack Activity Code Definitions........................................................7-5
Group/Channel Select ..................................................................7-6
Group/Frequency Select.................................................................7-7
Frequency Edit .......................................................................7-8
Clear Scan ...........................................................................7-9
Special Key Sequences ................................................................7-10
Lockout .........................................................................7-10
Copy ...........................................................................7-10
1st Use Default ...................................................................7-10
Factory Default ...................................................................7-10
-i-

Table of Contents (continued)
TR-800 Beltpack Operation .................................................................7-11
Power/Local Headset Volume..............................................................7-11
Battery Check ..........................................................................7-11
Talk Button ............................................................................7-11
Microphone Gain .......................................................................7-11
Channel Select Button ...................................................................7-11
Stage Announce (SA) ....................................................................7-11
Wireless Talk Around (WTA)..............................................................7-11
TR-800 Beltpack Menu Structure .........................................................7-12
Power-Up Screens ....................................................................7-13
Group/Channel Screen.................................................................7-14
Transmit Screen ......................................................................7-15
Receive 1 Screen .....................................................................7-16
Receive 2 Screen .....................................................................7-17
ClearScan™ .........................................................................7-18
Feature Enable/Disable Menus ..........................................................7-19
Stage Announce Enable/Disable .........................................................7-19
Wireless Talk Around Enable/Disable .....................................................7-19
Audio Channel A or B Enable/Disable ....................................................7-20
Talk Button Latch on/Latch off ..........................................................7-20
Special Key Sequences ................................................................7-21
Lockout .........................................................................7-21
1st Use Default ...................................................................7-21
Factory Default ...................................................................7-21
TR-825 Beltpack Menu Structure .........................................................7-22
Power-Up Screens ....................................................................7-23
Group/Channel Screen.................................................................7-24
Transmit Screen ......................................................................7-25
Receive 1 Screen .....................................................................7-26
Receive 2 Screen .....................................................................7-27
Audio Output ........................................................................7-28
ClearScan™ .........................................................................7-29
Feature Enable/Disable Menus ..........................................................7-30
Stage Announce Enable/Disable .........................................................7-30
Wireless Talk Around .................................................................7-31
Audio Channel A Options ..............................................................7-32
Audio Channel B Options ..............................................................7-33
Special Key Sequences ................................................................7-34
Lockout .........................................................................7-34
1st Use Default ...................................................................7-34
Factory Default ...................................................................7-34
System Walk-Thru .....................................................................8-1
Trouble Shooting ......................................................................9-1
Tech Tips ............................................................................10-1
Frequency Interaction .......................................................................10-1
Microphone Gain Adjustment .................................................................10-1
Battery Information ...................................................................11-1
Intercom System Specifications .........................................................12-1
Accessories and Replacement Parts ......................................................13-1
Software License......................................................................14-1
Certification Information ..............................................................15-1
Declaration of Conformity .............................................................15-3
-ii-

Introduction
General Description
The Telex RadioCom™ BTR-800 UHF Synthesized Wireless
intercom systems offer the ultimate in reliable,
high-performance, high-fidelity full-duplex communications.
The BTR-800 system includes the BTR-800 frequency agile
base station, working with up to four TR-800 or TR-825 fre--
quency agile beltpacks. The BTR-800 base station provides
full-duplex communications with the beltpacks.
The BTR system incorporates two audio channel operation,
permitting the beltpack operator to choose between two sepa--
rate audio channels of communications, with the base station
tracking the beltpack selection. This allows the user the flexi--
bility to create a party-line and a private line within the same
beltpack.
The BTR-800 system is perfectly suited for stand-alone opera--
tion and also can interface with Audiocom® (Telex), RTS®
TW, Clear-Com®, as well as RTS Matrix systems and other
4-wire communications systems. In addition to the external in--
tercom systems interfaces listed above, the system provides
connections for auxiliary balanced audio input and output, as
well as wireless talk-around (WTA) and stage announce (SA)
features.
The RadioCom™BTR series has been designed for reliable,
efficient operation. Operating in the 470 to 740 MHz range,
the units operate reliably at line-of-sight distances of 1,000
feet. With available antenna systems, from Telex, the effective
operating range can be extended. The high-efficiency
beltpacks provide up to 12 hours of uninterrupted operation
using standard alkaline batteries.
System Features
•Frequency-agile base station and beltpacks. No external
computer/device required to select frequencies.
•Backlit base-station LCD allows the user to easily moni-
tor the beltpack’s status as well as change base-station fre-
quencies.
•ClearScan™ function on base station and beltpack to au-
tomatically find the best channels on which to operate.
•Full-duplex (simultaneous talk and listen) operation.
•Compatible with Audiocom® (Telex), RTS TW, Matrix,
Clear-Com® , and other wired intercom types.
•Two channels of intercom audio.
•WTA (Wireless Talk Around) beltpack control. This fea-
ture allows beltpacks to talk to each other, but their audio
is lifted from any wired system connected to the base sta-
tion.
•SA (Stage Announce) beltpack control. Allows the user to
direct their audio to a jack on the back of the base for P.A.
systems or other external audio systems.
•Relay contact closure on the base when the SA button is
pressed.
•TR-825 features two audio channel binaural operation in
either stereo or mono mode.
•Beltpack units contained in a weather and shock resistant
die cast magnesium case.
•Convenient IEC power connector on the base station so
the unit can plug directly to outlets. No in-line or wall
plug power supply.
•Base station comes with rack ears for easy rack mounting.
1-1
RTS® and Audiocom® are registered trademarks of Telex Communications, Inc.
Clear-Com® is a registered trademark of Clear-Com Intercom Systems, Inc.
Section
1

1-2
PORTABLE
STATION 1
CONNECT
RECEIVE
1
LOGIC
PORTABLE
STATION 2
CONNECT
LOGIC
1 OF 5
RECEIVE
2
PORTABLE
STATION 3
CONNECT
LOGIC
RECEIVE
3
PORTABLE
STATION 4
CONNECT
RECEIVE
4
LOGIC
LOGIC
WTA A
TRANSMIT 1
LOGIC SELECT
FEMALE
MALE
XLR
2
W
I
R
E
4
W
I
R
E
2 WIRE
4 WIRE
INTERCOM A
I/C
T
E
L
E X
R
T
S
C
L
E
A R C
O
M
CHANNEL B
AUXILIARY
AUDIO
INPUT
XLR
FEMALE
ON/OFF
ON/O.M.
IN
INTERCOM B
OUT
2 WIRE
4 WIRE
RJ11
STYLE
2 WIRE
INTERCOM A
OUT
INTERCOM A
IN
INTERCOM B
IN
RJ11
STYLE
4 WIRE
4 WIRE 2 WIRE
MALE FEMALE
XLR
SELECT
LOGIC
INTERCOM B
AUXILIARY
AUDIO
OUTPUT
XLR
MALE
OUT
TRANSMIT 2
WTA B
SELECT
1 OF 5
SELECT
1 OF 5
SELECT
1 OF 5
SELECT
SA
MIC
GAIN
XLR
HEADSET
14
23
LOGIC
CHANNEL
SELECT
CHANNEL A
TALK
TALK
AB
VOLUME
LOGIC
XLR
MALE
STAGE
ANNOUNCE
OUTPUT
RELAY
CONTACT
margaiDkcolB008-RTB

BTR-800 Base Station
Controls and Connections - Front Panel
1. Power switch.
2. [Menu] and [Set] buttons – Used to select menus and set
options on the LCD.
3. Backlit Graphics LCD (Liquid Crystal Display).
4. [Up] and [Down] buttons – Used to select base station
options on the LCD.
5. Portable Station Connect – Buttons used to enable or
disable the respective receiver’s audio. GREEN LED =
Audio enabled, LED OFF = Audio disabled.
6. Intercom A Controls - Wired intercom A interface con-
trols. Audio input and output level controls. 2-wire or
4-wire select button with green LED indicator lights. Se-
lected LED will change to RED if the input levels are too
high.
7. Intercom B Controls - Wired intercom B interface con-
trols. Audio input and output level controls. 2-wire or
4-wire select button with green LED indicator lights. Se-
lected LED will change to RED if the input levels are too
high.
8. Auxiliary Controls - Wired auxiliary interface controls.
Audio input and output level controls. GREEN LED =
Aux. input enabled. LED will change to RED if the input
levels are too high.
9. Headset Volume – Controls the volume to the headset
connected to #14.
10. Headset Intercom Select – Controls the intercom to
which the local headset is connected. Each press of the
button changes the connection; channel A, channel B,
both.
11. Ta l k/Overmod Light – LED is green when talk button
#13 is active. A normal mic gain setting will cause the
LED to flash red on the loudest speech levels. If the gain
is too high, the LED will be red at normal speech volumes.
12. Microphone Gain – Adjusts the headset’s microphone
gain. Adjusts so that the overmod light #11 flashes from
green to red on loudest speech.
13. Talk Button – Press to enable the audio path from the local
headset. LED #11 will turn green when enabled. A quick
press and release latches button on. If the talk function is
latched on, pressing the talk button again will turn it off.
14. Local Headset Connector – Male XLR connector for
Telex units, Female XLR connector for RTS units. A dy-
namic or electret headset microphone is automatically de-
tected.
Figure 2
Local Headset Wiring
2-1
TALK
MIC GAIN
TALK/O.M.
VOLUME
SELECT
A
B
ON/O.M.
ON/OFF
IN
OUT
AUXILIARYINTERCOM B
2 WIRE
4 WIRE
SELECT
IN
OUT
2 WIRE
4 WIRE
SELECT
IN
OUT
INTERCOM A
PORTABLE STATION CONNECT
1 2 34
UP
DOWN
MENU
SET
RadioComäBTR-800
ClearScanTM
COPY
12345678910
11
12
13 14
Figure 1
BTR-800 - Front Panel
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
(3) Headphone
High (+)
(4) Headphone
Low (-)
Telex Units
(4) Headphone
Low (-)
(3) Headphone
High (+)
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
PUSH
Section
2
(5) (4) Headphone
Low (-)
(3) Headphone
High (+)
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
PUSH
RTS Units

Controls and Connections - Rear Panel
1. Receive Antenna - Female “TNC” Connector. Color band
on antenna must match color dot on base station.
2. Transmit Power Switch – HIGH = Transmitters at full
power. NORMAL = Transmitters 10dB below full power.
3. Transmit ON/OFF Switch – Turns the transmitters on or off.
4. I/C Select Switch – Set to the appropriate 2-wire intercom
type being interfaced to the unit. Set to either Telex, RTS
or Clear-Com®.
5. Base Station Link Jack – When two base stations are
connected through this jack, it allows wireless talk around
(WTA) from the beltpacks to be routed from the system
with it’s transmitters off to the system with it’s transmitters
on.
6. Relay Contact – A dry contact closure which is activated
when a beltpack user presses the stage announce (SA) but-
ton. Normally Open (NO). One amp at 24V maximum.
7. Intercom A – Interface to wired intercom system A.
2-Wire – Male and female 3-pin XLR connectors
wired in parallel. The connectors are switched to the
appropriate intercom configuration via the I/C Select
Switch.
4-Wire – An RJ-11 type jack compatible with “Ma-
trix” type intercom systems.
8. Intercom B – Interface to wired intercom system B.
2-Wire – Male and female 3-pin XLR connectors
wired in parallel. The connectors are switched to the
appropriate intercom configuration via the I/C Select
Switch.
4-Wire – An RJ-11 type jack compatible with “Ma-
trix” type intercom systems.
9. Auxiliary Input/Output – One 3-pin female XLR input
connector and one 3-pin male XLR output connector.
10. Stage Announce Output – Passes the audio from any of
the base station’s beltpacks that have selected stage an-
nounce (SA).
11. Power – IEC receptacle. Accepts 100 – 240 VAC, 50 – 60 Hz.
12. Transmit Antenna - Female “TNC” Connector. Color
band on antenna must match color dot on base station.
2-2
RECEIVE
HIGH
ON
NORM
OFF
TRANSMIT
POWER
I/C
TELEX CLEARCOM
RTS
BTR-800
FCC ID: B5DM514
CANADA 1321231218A
BASE STATION
LINK RELAY
CONTACT
INTERCOM A
2 WIRE
L
O
O
P
T
H
R
U
4 WIRE
INTERCOM B
2 WIRE
L
O
O
P
T
H
R
U
4 WIRE
AUXILIARY AUDIO
INPUT OUTPUT
STAGE ANNOUNCE
OUTPUT POWER
100-240 VAC 50-60 Hz
TRANSMIT
MADE IN USA
PUSHPUSHPUSH
Telex
Telex Communications, Inc.
1
2345678
910 11
12
Figure 3
BTR-800 - Rear Panel
Warning! Excessive current through the loop
thru ports will damage the intercom! Do not
exceed 200 mA current in the 2 wire loop
thru curcuits.
Warning! Excessive current through the loop
thru ports will damage the intercom! Do not
exceed 200 mA current in the 2 wire loop
thru curcuits.

2-3
BTR-800
Specifications
Overall
RF Frequency Range ......................470 - 608 MHz, 614 - 740 MHz in 18 MHz TX and RX bands
Power Requirements .......................................100-240 VAC, 50-60 Hz, IEC receptacle
Temperature Range ..............................................-4° F to 130° F (-20° C to 55° C)
Dimensions .............................19.00” W x 1.72” H x 14.00” D (48.3 cm x 4.4 cm x 35.6 cm)
Weight ...................................................................7 lbs 2 oz (3.24 kg)
TX Antenna ............................................1/2 Wave (supplied), TNC Male Connector
RX Antenna ............................................1/2 Wave (supplied), TNC Male Connector
FCC ID: ...............................B5DM529 (TX 482-518 MHz) B5DM514 (TX 518-608 MHz)
Frequency Response..............................................................300Hz-8kHz
Four Wire Input ................................................Level Adjustable (2 Vrms typical)
Four Wire 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 ......................................................Adjustable (2 Vrms typical)
Auxiliary Output ............................................Adjustable (2 Vrms typical into 600W)
Stage Announce Output ................Internally Adjustable (2 Vrms typical at rated deviation into 600W)
Stage Announce Relay .......................................Dry contact, rated at 1 Amp, 24V Max
Microphone input sensitivity .............................................................9mV
Local Headset Output ......................................40mW output into 600W(1% Distortion)
Transmitter
Type .............................................Two Synthesized Transmitters, 712 channels each
Transmit Power (each transmitter)..............................100mW Max. (High), 10 mW (Normal)
Modulation Type ........................................................................FM
Deviation .............................................................40 kHz (35 kHz Europe)
RF Frequency Stability................................................................0.005%
Modulation Limiter ................................................Peak-Responding Compressor
Radiated Harmonics & Spurious ........................................Exceeds FCC specifications
Receiver
Type..........Dual Conversion Superheterodyne, four Independent Synthesized IFs, FM, 712 channels each
RF Sensitivity........................................................<0.8 µV for 12 dB SINAD
Squelch Threshold ..............................................................20 dB SINAD
IF Selectivity.................................................................3 dB at 230 kHz
Image Rejection ...............................................................70 dB or better
Squelch Quieting......................................................................90 dB
RF Frequency Stability................................................................0.005%
Distortion ...............................................................<1% at full deviation

2-4 Blank

TR-800 Beltpack
Controls and Connections - Top Panel
Figure 4
TR-800 Top Panel
1. On/Off & Volume Control – Turns the beltpack power
on and controls headset volume.
2. Wireless Talk Around (WTA) – When pressed, the user’s
audio is disconnected from the wired intercom, auxiliary
input/output and the base station’s local headset. Other
beltpack users, on that audio channel, can hear the user as
normal. The button activates the nearby red LED as well
as the “TALK” LED, #6, when pressed.
3. Stage Announce (SA) –When pressed, the user’s audio is
routed to the stage announce connector on the back of the
base station. The user also loses their sidetone as an indi-
cation that stage announce is activated. The other wireless
beltpacks and wired users do not hear the user’s audio.
The button is non-latching and activates the nearby red
LED as well as the “TALK” LED, #6, when pressed.
4. Audio Channel Select Button – Allows user to select ei-
ther audio channel A or B.
5. Bat/Overmod Light (BAT/OM) – Light will flash once
when unit is turned on if the battery is good. If the light
stays on, battery is low. If the light does not flash, battery
is dead. A normal microphone gain setting will cause the
LED to flash at the beginning of most words at normal
speech levels. If the gain is too high, the LED will be red
during the complete word at normal speech levels.
6. Talk Light – LED is on when the talk button, SA or WTA
is active.
7. Talk button – Press to enable the audio path from the lo-
cal headset microphone. The “TALK” LED, #6, will turn
red when enabled. A quick press and release latches the
talk function, unless latching has been disabled. Holding
the button for over ½ a second will cause the audio path to
be enabled only for as long as the button is held. If the talk
function is latched on, pressing the talk button again will
turn it off.
3-1
VOL
OFF SA
WTA
TelexR
A B
CHANNEL
BAT/OM TALK
TALK
12456
7
3
Section
3

Controls and Connections - Rear Panel
Figure 5
TR-800 Rear Panel/Connector/Antennas
1. [MENU] and [SET] buttons – Used to select menus and
set options on the LCD.
2. LCD (Liquid Crystal Display)
3. [UP] and [DOWN] buttons – Used to select beltpack op-
tions on the LCD.
4. Microphone Gain – Adjusts the headset’s microphone
gain. Adjust so that the BAT/OM LED will flash at the be-
ginning of most words at normal speech levels
5. Push-to-Talk/Push-to-Transmit Switch –
Push-to-Talk (PT TALK) – The transmitter is always
on. No audio sent unless the talk switch, WTA or SA
button pressed. Recommended position.
Push-to-Transmit (PT TX) - The transmitter and audio
path are off except when the talk switch, WTA or SA
button is pressed.
6. Headset Connector – Male XLR connector for Telex
units, Female XLR connector for RTS units. A dynamic or
electret headset microphone is automatically detected by
the beltpack and a bias voltage supplied if needed.
Figure 6
Headset Jack Wiring
7. Battery Latch – Press down to enable the battery pack to
be released. While the latch is held down, slide the battery
pack about 1/8 inch back, toward the latch, until it stops.
Then lift out.
8. Receive Antenna – Screw type ¼-wave replaceable an-
tenna. The color dot on the screw end of the antenna must
match color dot on antenna receptacle.
9. Transmit Antenna – Screw type ¼-wave replaceable an-
tenna. Color dot on the screw end of the antenna must
match color dot on antenna receptacle.
3-2
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
(4) Headphone
Low (-)
(3) Headphone
High (+)
(1) Microphone
Shield (-)
(4) Headphone
Low (-)
(3) Headphone
High (+)
(2) Microphone
Audio (+)
RTS Units
Telex Units
MENU
SET
MIC
PT
TX
PT
TALK
6
6
7
7
8
89
9
MENU
SET
MIC
PT
TX
PT
TALK
22
11
33
44
55
(1) Microphone
Shield (-)
(5) (4) Headphone Low (-)
(3) Headphone High (+)
(2) Microphone
Audio (+)

3-3
TR-800
Specifications
RF Frequency Range ......................470 - 608 MHz, 614 - 740 MHz in 18 MHz TX and RX bands
Power Requirements........................................6 “AA” Cells Alkaline (NiMH optional)
Current Draw ...................................................140 mA (Push-to-Talk, Talk On)
Temperature Range ..............................................-4° F to 130° F (-20° C to 55° C)
Dimensions .................................3.75”W x 5.05”H x 1.65” D (9.5 cm x 12.8 cm x 4.2 cm)
Weight ......................................................16 oz (454g) with alkaline batteries
TX Antenna..........................................1/4 Wave (supplied), Screw type, Replaceable
RX Antenna..........................................1/4 Wave (supplied), Screw type, Replaceable
FCC ID: ...............................B5DM518 (TX 470-608 MHz), B5DM515 (TX 614-746 MHz)
Frequency Response..............................................................300Hz-8kHz
Microphone input sensitivity .............................................................7 mV
Local Headset Output ......................................40 mW output into 600W(1% distortion)
Transmitter
Type ...............................................................Synthesized, 712 channels
Transmit Power ..............................................50 mW Max. (auto-power reduction)
Modulation Type ........................................................................FM
Deviation .............................................................40 kHz (35 kHz Europe)
RF Frequency Stability................................................................0.005%
Modulation Limiter ................................................Peak-Responding Compressor
Radiated Harmonics & Spurious ........................................Exceeds FCC specifications
Receiver
Type ...............................Dual Conversion Superheterodyne, Synthesized, FM, 712 channels
RF Sensitivity........................................................<0.7 µV for 12 dB SINAD
Squelch Threshold .................................................20 dB SINAD (About 1.0 µV)
IF Selectivity.................................................................3 dB at 230 kHz
Image Rejection ...............................................................70 dB or better
Squelch Quieting......................................................................90 dB
RF Frequency Stability................................................................0.005%
Distortion ...............................................................<1% at full deviation

3-4 Blank

TR-825 Beltpack
Controls and Connections - Top Panel
Figure 7
TR-825 Top Panel
1. On/Off and Volume Control - Turns beltpack power on
and controls headset volume for Intercom Channels “A”
and “B”. Either knob, “A” or “B”, turns the beltpack on.
Both knobs must be off to turn the beltpack off. If only
one knob is off, then only that Intercom Channel, “A” or
“B” is off for both transmit and receive audio.
2. Wireless Talk Around (WTA) - When pressed, the user’s
audio is disconnected from the wired intercom, auxiliary
input/output and the base station’s local headset. Other
beltpack users, on that audio channel, can hear the user as
normal. The default setting is software selectable, as to
which Intercom Channel, “A”, “B”, “A + B”, or currently
selected channel, is activated along with the “WTA” but-
ton. The “WTA” button activates the nearby red LED as
well as the software selected Intercom Channel “TALK”
LED if not already active.
3. Stage Announce (SA) - When pressed, the user’s audio is
routed to the stage announce connector on the back of the
base station. The user also loses their sidetone as an indi-
cation that stage announce is activated. The other wireless
beltpacks and wired users do not hear the user’s audio.
The button is non-latching and activates the nearby red
LED.
4. Talk Button - Press to enable the audio path to either In-
tercom Channel “A” or “B” or “A + B”, from the local
headset microphone. The associated “TALK” LED, #6,
will turn red when enabled. A quick press and release
latches the talk function, unless latching has been dis-
abled. Holding the button for over ½ second, will cause
the audio path to be enabled only for as long as the button
is held. If the talk function is latched on, pressing the talk
button again will turn it off.
5. Low Battery/Overmodulation (BAT/OM) Light - Light
will flash once when unit is turned on if the battery is
good. If the light stays on, battery is low. If the light does
not flash, battery is dead. A normal microphone gain set-
ting will cause the LED to flash at the beginning of most
words at normal speech levels. If the gain is too high, the
LED will be red during the complete word at normal
speech levels.
6. Talk Light - Will turn red when enabled by associated
“TALK” or “WTA” button.
4-1
VOL
OFF
SA
WTA
TelexR
TALK
VOL
OFF
TALK
A B
BAT/OM
1231
66
4
45
Section
4

Controls and Connections - Rear Panel
Figure 8
TR-825 Rear Panel/Connector/Antennas
1. [MENU] and [SET] buttons – Used to select menus and
set options on the LCD.
2. LCD (Liquid Crystal Display)
3. [UP] and [DOWN] buttons – Used to select beltpack op-
tions on the LCD.
4. Microphone Gain – Adjusts the headset’s microphone
gain. Adjust so that the BAT/OM LED will flash at the be-
ginning of most words at normal speech levels
5. Push-to-Talk/Push-to-Transmit Switch –
Push-to-Talk (PT TALK) – The transmitter is always
on. No audio sent unless the talk switch, WTA or SA
button pressed. Recommended position.
Push-to-Transmit (PT TX) - The transmitter and audio
path are off except when the talk switch, WTA or SA
button is pressed.
6. Headset Connector – Male XLR connector for Telex
units, Female XLR connector for RTS units. A dynamic or
electret headset microphone is automatically detected by
the beltpack and a bias voltage supplied if needed. Four
pin Telex/RTS units are monaural. Five pin Telex/RTS
units have a software set-up which grounds or opens pin 3.
Figure 9
Headset Jack Wiring
Single sided 5-pin headsets will only receive A or B, depend--
ing on how headphone is wired. These headsets must have the
beltpack set for [Ab SEP]
7. Battery Latch – Press down to enable the battery pack to
be released. While the latch is held down, slide the battery
pack about 1/8 inch back, toward the latch, until it stops.
Then lift out.
8. Receive Antenna – Screw type ¼-wave replaceable an-
tenna. The color dot on the screw end of the antenna must
match color dot on antenna receptacle.
9. Transmit Antenna – Screw type ¼-wave replaceable an-
tenna. The color dot on the screw end of the antenna must
match color dot on antenna receptacle.
4-2
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
(4) Headphone
Low (-)
(3) Headphone
High (+)
MENU
SET
MIC
PT
TX
PT
TALK
6
6
7
7
8
89
9
MENU
SET
MIC
PT
TX
PT
TALK
2
2
1
1
3
3
4
4
5
5
(1) Microphone
Shield (-)
(3) Switched
Headphone Ground
(2) Microphone
Audio (+)
(4) Headphone
(Audio A)
(5) Headphone
(Audio B)
(1) Microphone
Shield (-)
(4) Headphone
Low (-)
(3) Headphone
High (+)
(2) Microphone
Audio (+)
RTS Units
Telex Units
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
(5) Headphone
Audio B
(4) Headphone
Audio A
(3) Switched Headphone Ground
Menu Set
[ Ab SEP ]
[ Ab Add ]
PIN 3
GND
OPEN
RESULT ON 5-PIN
DUAL HEADPHONE
A in one side, B in other side
A + B

4-3
TR-825
Specifications
RF Frequency Range ......................470 - 608 MHz, 614 - 740 MHz in 18 MHz TX and RX bands
Power Requirements........................................6 “AA” Cells Alkaline (NiMH optional)
Current Draw ............................................190 mA (Push-to-Talk, A and B Talk On)
Temperature Range ..............................................-4° F to 130° F (-20° C to 55° C)
Dimensions ................................3.75” W x 5.35” H x 2.02” D (9.5 cm x 13.5 cm x 5.1 cm)
Weight ......................................................21 oz (595g) with alkaline batteries
TX Antenna..........................................1/4 Wave (supplied), Screw type, Replaceable
RX Antenna..........................................1/4 Wave (supplied), Screw type, Replaceable
FCC ID: .........................................................................B5DM517
Frequency Response..............................................................300Hz-8kHz
Microphone input sensitivity .............................................................7 mV
Local Headset Output......................................40 mW output into 600W(1% distortion)
Transmitter
Type ...............................................................Synthesized, 712 channels
Transmit Power ..............................................50 mW Max. (auto-power reduction)
Modulation Type ........................................................................FM
Deviation .............................................................40 kHz (35 kHz Europe)
RF Frequency Stability................................................................0.005%
Modulation Limiter ................................................Peak-Responding Compressor
Radiated Harmonics & Spurious ........................................Exceeds FCC specifications
Receiver
Type .................. Two, Dual Conversion Superheterodyne Receivers, Synthesized, FM, 712 channels
RF Sensitivity........................................................<0.8 µV for 12 dB SINAD
Squelch Threshold .................................................20 dB SINAD (About 1.0 µV)
IF Selectivity.................................................................3 dB at 230 kHz
Image Rejection ...............................................................70 dB or better
Squelch Quieting......................................................................90 dB
RF Frequency Stability................................................................0.005%
Distortion ...............................................................<1% at full deviation

4-4 Blank

Initial Equipment Set-Up
Unpacking
Unpack your RadioCom™System. Below are the items that
should come with your base station and each belt pack.
BTR-800
TR-800, TR-825
Contact the shipper or your dealer immediately if anything is
damaged or missing. Fill out the registration card and return it
to Telex to register the unit.
5-1
Quantity Description
1BTR-800 Base Station
1Operating Instructions
1Power Cord
2Antennas (one Transmit and one Receive)
1Warranty Card
1Screwdriver
12 terminal plug (for SA Relay)
1Warning Card
4Rubber feet
Quantity Description
1TR-8XX with Antennas
1Battery pack
1Instruction Sheet
1Screwdriver
1Warranty Card
Section
5

Antenna Connection
The base station is supplied with two (2) antennas. One
1/2-wave antenna for Transmit and one 1/2-wave for Receive.
The antennas have TNC male connectors.
The frequency range of the antennas should match the receiver
and transmitter of the base station. Match the color code on
the antenna with the color code on the base station.
Attach the transmit 1/2-wave antenna to the antenna input re--
ceptacle labeled “Transmit” on the right side of the rear panel.
The antenna should be vertically aligned.
Figure 10
Attaching Transmit 1/2-Wave Antenna
Attach the receive 1/2-wave antenna to the antenna input re--
ceptacle labeled “Receive” on the left side of the rear panel.
The antenna should be vertically aligned.
Figure 11
Attaching Receive 1/2-Wave Antenna
Antenna Polarization
The Telex Wireless Intercom System is “Vertically Polarized”.
This means both the transmitting and receiving antennas
should operate in the vertical position.
Figure 12
Vertically Polarized Antennas
Distance between Antennas
The distance between the base station’s receive and transmit
antennas is not adjustable when the antennas are connected di--
rectly on the back of the unit.
The antennas can be remoted for better signal path. A Telex
coax assembly with remote antennas may be required. See
"Accessory" section fr ordering information.
NOTE: If your base station is to be located in a shielded rack
mount enclosure or other poor RF location, you must remote
the 1/2-wave antennas with coax assemblies. See "Accessories
and Replacement Parts" section for remote mounting hard--
ware.
Antenna Placement
Proper antenna placement probably has the most effect on
your TELEX Wireless Intercom System’s overall perfor--
mance. The following suggestions will result in optimum per--
formance.
Proper placement of the beltpack can be critical. The antennas
should be in the open. Bending the antennas up and placing
the beltpack in a pocket, etc., will reduce system distance.
It is suggested that the unit be worn on the belt with both an--
tenna’s vertical for best operating range and performance.
Figure 13
Proper Dressing of the Antennas
5-2
Telex
WTA
A
B
OFF
BAT/OMTALK
RadioCom
TR-800
TM
VOL
SA
TALK
MICGAIN
TALK/O.M.
VOLUME
SELECT
A
B
ON/O.M.
ON/OFF
IN
OUT
AUXILIARYINTERCOM B
2WIRE
4WIRE
SELECT
IN
OUT
2WIRE
4WIRE
SELECT
IN
OUT
INTERCOMA
PORTABLESTATION CONNECT
1 2 34
UP
DOWN
MENU
SET
RadioComäBTR-800
ClearScanTM
COPY
ANTENNAS SHOULD BE VERTICAL
Telex
WTA
A
B
OFF
BAT/OM
TALK
RadioCom
TR-800
TM
VOL
SA