Telex TR-500, BTR-500, BTR-600C, TR-600C User Manual
Telex
Operating Instructions
RadioCom
ON
OFF
BTR-600C
TM
P
B
A
E
L
C
T
K
LOCAL
IN
IN OUT
SIDETONE
OUT
I/C
AUX
BELT PACK
™
RadioCom
BTR-500/600C
AUDIO
CHANNEL
1
AUTO
2
OUT
OFF
1
I/C
TELEX
RTS
AUX
IN
MIC
VOL
GAIN
TALK/
OM
TALK
2
ON
A
1B
CODE SWITCH
T
2
elex
HEADSET
TR-500/600C
Professional
Wireless
Intercom Set
R
Table of Contents
Introduction..........................................................................................................................................1
General Description.........................................................................................................................1
System Features...............................................................................................................................1
Base Station Transceiver.....................................................................................................................2
Controls And Connections...............................................................................................................2
Front Panel.................................................................................................................................2
Rear Panel..................................................................................................................................3
Specifications...................................................................................................................................4
Beltpack Transceiver...........................................................................................................................5
Controls and Connections................................................................................................................5
Specifications...................................................................................................................................6
Initial Equipment Set-Up....................................................................................................................7
Unpacking........................................................................................................................................7
Antenna Information........................................................................................................................7
Antenna Connections.................................................................................................................7
Antenna Polarization..................................................................................................................8
Distance Between Antennas ......................................................................................................8
Antenna Placement ....................................................................................................................8
Improving Reception/Increasing Range ..................................................................................10
Base Station Set-up.......................................................................................................................11
Location ...................................................................................................................................11
Rack Mounting.........................................................................................................................11
Local Headset Connection.......................................................................................................11
RF Transmit/Receive Channel Switches..................................................................................11
RF Transmit Mode Switch.......................................................................................................12
Intercom Type Switch..............................................................................................................12
Dual Listen Switches ...............................................................................................................12
Audio Channel Switch.............................................................................................................13
Telex In/Out Switch.................................................................................................................13
Auxiliary Switch......................................................................................................................13
Auxiliary to I/C Switch (program audio).................................................................................13
Code Switch (BTR-600C Only)...............................................................................................13
Interconnection to a Hard-wired Intercom...............................................................................14
Auxiliary Audio Connection....................................................................................................17
Power Connection....................................................................................................................17
Dummy Load...........................................................................................................................17
Beltpack Set-up..............................................................................................................................18
Headset Connection.................................................................................................................18
RF Transmit/Receive Channel Switches.................................................................................18
RF Transmit Mode Switch.......................................................................................................18
Code Switch (TR-600C Only).................................................................................................18
Battery Installation...................................................................................................................19
Pre-Walk-Thru Checklist..................................................................................................................20
-i-
Table of Contents (Continued)
System Operation...............................................................................................................................21
Base Station Operation ..................................................................................................................21
Power .......................................................................................................................................21
Push-to-Talk/Lock-to-Talk Switch...........................................................................................21
Local Headset Volume.............................................................................................................21
Microphone Gain.....................................................................................................................21
Dual Listen Level.....................................................................................................................22
Intercom Level.........................................................................................................................22
Auxiliary Level........................................................................................................................22
Sidetone Level .........................................................................................................................22
Beltpack Operation ........................................................................................................................23
Power/Local Headset Volume..................................................................................................23
Battery Check...........................................................................................................................23
Push-to-Talk/Lock-to-Talk Switch...........................................................................................23
Microphone Gain.....................................................................................................................23
Sidetone Level .........................................................................................................................24
Example System Configurations....................................................................................................25
Single Base Station AudioCom (Telex) System......................................................................25
Single Base Station RTS System .............................................................................................26
Six Base Station RTS System ..................................................................................................27
Eight Base Station Telex System.............................................................................................28
Single Beltpack to Single Beltpack System.............................................................................29
System Walk-Thru.............................................................................................................................30
Troubleshooting..................................................................................................................................31
Tech Tips.............................................................................................................................................32
Codes Settings and the BTR-600C................................................................................................32
Frequency Interaction ....................................................................................................................32
Microphone Gain Adjustment........................................................................................................33
Battery Information...........................................................................................................................33
Intercom System Specifications........................................................................................................33
Accessories..........................................................................................................................................34
Customer Service Information .........................................................................................................35
FCC Information ...............................................................................................................................36
-ii-
Introduction
General Description
The Telex Radiocom BTR-500 and BTR-600C
UHF Wireless intercom systems offer the ultimate
in reliable, high performance, high fidelity full duplex communications.
The BTR-500 series includes the BTR-500 frequency agile base station, working with the TR-500
transceiver beltpack. The BTR-500 base station provides full duplex communications with a single
beltpack. Sixteen BTR-500s, or more, may be operated simultaneously. Also a single BTR-500 base
station can accommodate an unlimited number of
beltpacks operating in “Push-to-Transmit” mode.
The BTR-600C series has all the features of the
BTR-500 with the addition of digital modulation
and encryption for secure communications. Base
station and beltpacks can choose from over 65,000
user selectable security codes out of over 16 million
possible codes by means of four cipher code
switches on the units. Sixteen BTR-600C, or more,
may be operated simultaneously, permitting 16, or
more, discrete full duplex radio channels.
The BTR systems incorporate auto-switching 2
channel operation, permitting the beltpack operator
to choose between 2 separate audio channels of
communications, with the base station tracking the
beltpack selection. Auto-switching allows the user
the flexibility to create a party-line and a private
line within the same beltpack.
The BTR-500 and BTR-600C systems are perfectly
suited for stand-alone operation and also can interface with Audiocom® (Telex), RTS® TW, as well
as RTS Matrix systems and other 4 wire communications systems. Clear-Com® intercom system may
also be interfaced to a BTR-500 and BTR-600C
systems through the use of a Telex to Clear-Com Interface box, see “Accesories” for more information.
In addition to the external intercom systems interfaces listed above, the base stations provide connections for auxiliary balanced audio input and output.
The Radiocom BTR series has been designed for reliable, efficient operation. Operating in the 520 to
760 MHz range, the units operate reliable at distances of 1,000 feet. With available antenna systems
from Telex, the effective operating range can be extended. The high efficiency beltpacks provide 12
hours of uninterrupted operation using standard alkaline batteries.
System Features
· Compatible with Audiocom (Telex), RTS TW, RTS
Matrix, Clear-Com (with external interface box),
and other wired intercom types.
· Intercom loop thru jacks for connecting multiple
units.
· Full Duplex (simultaneous talk and listen) operation.
· Beltpack TR unit contained in a weather and shock
resistant die cast magnesium case.
· Digitally encrypted RF (Radio Frequency) link for
secure communication on the 600C version.
· Flexible power requirements. The base unit can be
powered by any 12 to 15 Volt, AC or DC, 400 mA
power source. An external AC wall supply is supplied with the unit.
· Two transmit and two receive RF channels to help
avoid radio interference.
· Base stations are table or rack mountable.
· Audio channel switch on the beltpack unit enables it
to remotely control the intercom channel on the base
unit.
· Two channels of audio.
· Beltpack batteries last up to 12 hours when using
standard AA alkaline batteries.
· Audio out jack for P.A. systems or other external audio systems.
RTS® and Audiocom® are registered trademarks of Telex Communications, Inc.
Clear-Com® is a registered trademark of Clear-Com Intercom Systems, Inc.
-1-
Base Station Transceiver
Controls and Connections
123
TM
RadioCom
RadioCom
ON
ON
B
P
B
P
E
A
E
A
L
L
C
C
T
T
K
K
LOCAL
OFF
OFF
BTR-600C
LOCAL
57
491011 14
AUDIO
AUDIO
OUT
OUT
IN
IN
CHANNEL
CHANNEL
1
1
AUTO
OUT
OUT
BELTPACK
BELTPACK
AUTO
2
2
I/C
I/C
IN
IN
AUX
AUX
SIDETONE
SIDETONE
86
Front Panel Controls and Connections
1. Power Switch - Illuminates when on.
2. Beltpack Light - Illuminates when a beltpack is transmit-
ting to base station.
3. Intercom In Level Control - Adjust for optimum level.
Intercom light #11 should just flash red on loudest
speech.
4. Intercom Out Level Control - Adjusts output to match
input level of wired intercoms.
5. Auxiliary In Level Control - Adjust for optimum level.
Auxiliary light #13 should just flicker from green to red
on loudest sounds.
6. Auxiliary Out Level Control - Adjusts output to match
input level of auxiliary equipment.
7. Sidetone Local Control - Adjusts level of voice feedback
to earphone when a headset is plugged into jack #18.
8. Sidetone Remote Control - Controls sidetone level in the
beltpack.
9. Audio Channel Switch And Lights -
A. “I/C” switch on rear panel set to Telex
“I/C 1 or 2" jack (and corresponding pins on ”I/C Loop
Thru"). In “Auto” position; allows selection of channels 1 or 2 from the beltpack.
- Selects either
I/C
I/C
IN
IN
TELEX
TELEX
OUT
OUT
AUX
AUX
ON
ON
OFF
OFF
12
Figure 1
11.
12. Auxiliary Switch - Turns the auxiliary input on and off.
13. Auxiliary Light - Illuminates green when switch #12 is
14. Code Switch (BTR-600C Only) - Allows user to select
15. Volume, Headset - Controls volume on headset plugged
16. Talk/Overmodulation Light - Illuminates green when
17. Microphone Gain Control - Adjust so that light #16 just
18. Headset Connector - Standard “XLR” type. Plug for
15
17 18
16
HEADSET
HEADSET
MIC
MIC
GAIN
A1B
A1B
CODE SWITCH
CODE SWITCH
13
GAIN
2
2
VOL
VOL
TALK/
TALK/
OM
OM
TALK
TALK
19
Intercom Light - Flashes red when input level is too high.
See #3 for adjustment.
on. Flashes red when input level is too high. See #5 for adjustment.
cipher code (over 65,000 available). Any combination of
letters and/or numbers may be selected except 0000. Data
is unencrypted when the setting is 0000. The code switch
settings on the BTR-600C and TR-600C must match exactly.
into #18
talk switch #19 is on. Flashes red when headset microphone is over modulated - See #17 for adjustment.
flickers from green to red on the loudest speech.
Telex units and jack for RTS units. Wired as follows:
Telex Units
B. “I/C” switch on rear panel set to RTS
channel 1 or 2 on both I/C jacks (and corresponding
pins on “IC Loop Thru”). In “Auto" position; allows
selection of channels 1 or 2 from the beltpack.
10. Intercom Switch - See settings below.
A. “I/C” switch on rear panel set to “Telex”
1. “Telex Out” Setting - Intercom is disconnected
from all “I/C” jacks on rear panel.
2. “Telex In” Setting - Intercom is connected to “I/C
Loop Thru” and “I/C 1 or 2" jacks. Channel 1 or 2
is selected by switch #9 or the channel switch on
the beltpack.
B. “I/C” switch on rear panel set to “RTS”
effect. All I/C jacks on rear panel are active on either
setting.
- Selects RTS
- Switch has no
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
(4) Headphone
Low (-)
(3) Headphone
High (+)
RTS Units
(4) Headphone
Low (-)
(1) Microphone
Shield (-)
(3) Headphone
High (+)
(2) Microphone
Audio (+)
Figure 2 Headset Wiring
19. Talk Switch - Press-to-talk, release to disable. Press and
release quickly to stay on.
-2-
Base Station
Controls and Connections - Rear Panel
I
/C
TELEX RTS
3
LISTEN
PUSH
DUAL
O
N
I/C 1
LEVEL
7
8
9
AUDIO
OUT
XMIT
MODE
REMOTE
CH2+2
O
F
F
CH2+1
CONT.
6
5
1
TRANSMIT
ANT.
A
B
TRANSMIT
CHANNEL
4
2
Controls and Connections - Rear Panel - BTR-600C
1. Transmit Antenna Jack - Color band on antenna must
match color dot on base station. Female “TNC” Connector.
2. Transmit Channel Switch - Changes frequency of
beltpack (shown on Serial No. Tag). Must match receive
channel on beltpack.
3. Audio Out - “RCA” type jack
provides a high impedance output for an audio amplifier.
4. I/C Switch - Set for Telex or RTS type intercom systems.
See Figures 4 and 5.
5. Transmit Mode Switch -
A. “Remote” - The unit transmits only when the beltpack
is transmitting.
B. “Off” - The unit does not transmit.
C. “Continuous” - The transmitter is on continuously.
(Recommended Setting)
Ground
Audio Out
LOOP
THRU
1
6
6
9
9
5
I/C
10
Figure 3
15
RECEIVE
POWER
12-15V
AUX
AC/DC
13
14
132
SET TO "TELEX"
I/C 1
ANT.
A
B
RECEIVE
CHANNEL
1
6
1
6
PIN
1 GROUND
2 AUDIO
3 + AUDIO
SWITCH #4
5
9
5
9
2
1
3
I/C 2
(CHANNEL 2)
1
5
11
BTR-600C
PUSH
I/C 2
FCC ID. B5DM503
MADE IN U.S.A.
PATENTPENDING
12
(CHANNEL 1)
Figure 4
Intercom 1 and 2 Jacks - Switch set to Telex
1
6
5
9
A. CH1+2=OFF Both audio channels are iso-
CH2+1=OFF
lated from each other.
B. CH1+2=ON Audio channel 2 is mixed into
CH2+1=OFF
channel 1.
C. CH1+2=OFF Audio channel 1 is mixed into
CH2+1=ON
channel 2.
D. CH1+2=ON Both audio channels are
CH2+1=ON
mixed into each other.
6. Dual Listen Switches
7. Dual Listen Level Control-Adjusts level of audio mix.
8.&11.Intercom 1 and 2 Jacks -
A. I/C Switch (#4) set to Telex
- “I/C 1" or ”I/C 2" (and
matching pins on jacks 9 and 10) are selected by the
Audio Channel switch on the front panel or the Chan
nel switch on the base station.
If one or both intercom lines are not used, plug the
Telex dummy load(s) into the appropriate unused
jack(s).
2
3
IC/1
1
SET TO "RTS"
1
6
PIN
1 COMMON
2 CHANNEL 1
3 CHANNEL 2
SWITCH #4
5
9
132
IC/2
Figure 5
Intercom 1 and 2 Jacks - Switch set to RTS
B. I/C Switch (#4) set to RTS - “I/C 1" and ”I/C 2" are
connected in parallel (including matching pins on jacks
9 and 10). Channels 1 and 2 are selected by the Audio
Channel switch on the front panel or the channel
switch on the base station.
If neither channel 1 or 2 are connected to other inter
coms, plug the RTS dummy load into the “I/C 1 or 2"
jack. Do not use the dummy load if the unit is con
nected to an RTS intercom system.
-3-
9. & 10. Loop Thru I/C - 9 pin D-sub jack. Wired as shown.
11. See #8.
12. Auxiliary Jack - 6 pin RJ-11 telephone type jack. Com
patible with “RTS Matrix” type intercoms.
PIN654321
13. Power Jack - 12-15 VDC, 400mA minimum or 12-15
VAC rms, 400mA rms minimum. Accepts 5.5 mm x 2.1
mm plug.
-
14. Receive Channel Switch - Changes frequency of receiver
(shown on Serial No. Tag). Must match transmit channel
on beltpack.
13. Receive Antenna Jack - Color band on antenna must
match color dot on base station. Female “TNC” Connector.
NC
AUDIO IN -
AUDIO OUT -
NC
AUDIO IN +
AUDIO OUT +
Figure 6
Auxiliary Jack
BTR-500/600C
Specifications
RF Output .............................................40mWmaximum, 25mW typical
Temperature Range.........................................-4°F to 130°F (-20°C to 55°C)
Dimensions ............................8.25"W x 1.75"H x 11.25"D (21cm x 4.5cm x25.6cm)
Weight ................................................................4lbs. (1.8kg)
Modulation Type
BTR-600C..............................................................NFSK
BTR-500 .................................................................FM
Deviation
BTR-600C ...........................................Complies with FCC 74.861e6
BTR-500.............................................................±40 KHz
Frequency Response
BTR-600C ........................................................300-4500 Hz
BTR-500..........................................................300-8000 Hz
RF Frequency Stability .........................................0.005% crystal controlled
Modulation Limiter.................................................Internal Compressor
Microphone input sensitivity .................................................2.0-25 mV
Radiated Harmonic and Spurious.........................Meets or exceeds FCC specifications
Typically -45 dBc or better
RF Frequency Range ......................................520to608and614to760MHz
Receiver sensitivity ....................................Less than 0.5 uV for 12 dB SINAD.
I.F. Bandwidth
BTR-600C .....................................................230KHzat-3dB
BTR-500.......................................................150KHzat-3dB
Type..........................................Single Conversion Superhet, 10.7 MHz I.F.
Image Rejection........................................................70dBorbetter
Audio Output, Headset ............................................32mWinto 600 Ohms
Squelch
BTR-600C ......................................................Internal, 3.0 mV
BTR-500 .......................................................Internal, 1.5 mV
FCC...............................................................Transmit, Part 74
Receive, Verification, Part 15
FCCID....................................B5DM503(BTR-600C), B5DM505 (BTR-500)
-4-
Beltpack
1
Controls and Connections
2
3
5
4
TALK
AUDIO
F
F
O
O.M.
BAT/
1
CHANNEL
2
x
e
l
e
T
6
VOLUME
O
N
N
I
A
G
C
I
M
7
Controls and Connections
1. Volume Control and Power Switch - Turns power on
and off and controls headset volume.
2. Battery/Overmodulation Light - Flashes once when unit
is turned on if battery is good. If light stays on, battery is
low. If light does not flash, battery is dead.
Flickering red light when talking means microphone gain
is too high and speech will sound distorted. Adjust Mic
Gain control #7 so that the light barely flashes on the loudest speech.
Figure 7
10. Headset Connector - Standard “XLR” type. Plug for T elex
13
12
11
9
10
units and jack for R TS units. Wired as shown.
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
(4) Headphone
Low (-)
(3) Headphone
High (+)
Telex Units
8
3. Talk Switch - Press to talk, release to disable. Press and
release quickly to stay on continuously.
4. Talk Light - Illuminates when Talk function is on.
5. Audio Channel Switch - The Audio Channel Switch en-
ables the beltpack user to switch between wired intercom
channels 1 and 2 on the base station.
6. Side Tone Control - (Only installed in special beltpack to
beltpack direct communications units). Adjusts level of
voice feedback to earphone for a headset that is plugged
into the jack #10. The “Remote Sidetone” on the base station controls the beltpack sidetone in standard units.
7. Microphone Gain Control - Adjust so the light #2 barely
flashes on the loudest speech.
8. Code Switch (TR-600C Only) - Allows the user to select
a cipher code (over 65,000 available). Any combination of
letters and/or numbers may be selected except 0000. Data
is unencypted when the setting is 0000. The code switch
settings on the TR-600C and BTR-600C must match ex
actly.
9. Battery Latch - Press down to release the battery pack.
Pack slides off in opposite direction.
(1) MICROPHONE
SHEILD (-)
(2) MICROPHONE
AUDIO (+)
RTS Units
(4) HEADPHONE
LOW (-)
(3) HEADPHONE
HIGH (+)
Figure 8
Headset Jack Wiring
11. Push-to-Talk/Push-to-Transmit - When the switch is set
to “Push-to-Talk”, the transmitter in the beltpack is always
on, but no audio signal is sent unless the Talk Switch #3 is
activated. The “Push-to-Talk” switch setting is the recommended position.
When the switch is set to “Push-to-Transmit", the transmitter is turned on when the Talk Switch is activated and
turned off when the talk switch is deactivated.
-
12. Receive Channel - Changes the frequency of the receiver.
It must match the Transmit Channel of the base station.
13. Transmit Channel - Changes frequency of the transmit
ter. It must match Receive Channel of the base station.
-5-
-
Beltpack
Specifications
RF Output.............................................................25mWtypical
Temperature Range.........................................-4°F to 130°F (-20°C to 55°C)
Dimensions............................4"Wx57/8"H x 1 5/8"D (120mm x 149mm x 41mm)
Weight ..................................................1lb.6oz.(625g) with batteries
Modulation Type
TR-600C ...............................................................NFSK
TR-500...................................................................FM
Deviation
TR-600C ............................................Complies with FCC 74.861e6
TR-500 ..............................................................±40KHz
Frequency Response
TR-600C..........................................................300-4500 Hz
TR-500 ...........................................................300-8000 Hz
RF Frequency Stability .........................................0.005% crystal controlled
Modulation Limiter.................................................Internal Compressor
Microphone input sensitivity .................................................2.0-25 mV
Radiated Harmonic and Spurious.........................Meets or exceeds FCC specifications
Typically -45 dBC or better
RF Frequency Range .................................520to608MHzand614to760MHz
Receiver sensitivity ....................................Less than 0.5 uV for 12 dB SINAD.
I.F. Bandwidth
TR-600C.......................................................230KHzat-3dB
TR-500 ........................................................150KHzat-3dB
Type..........................................Single Conversion Superhet, 10.7 MHz I.F.
Image Rejection........................................................70dBorbetter
Audio Output, Headset ............................................32mWinto 600 Ohms
Squelch
TR-600.........................................................Internal, 3.0 µV
TR-500.........................................................Internal, 1.5 µV
FCC...............................................................Transmit, Part 74
Receive, Verification, Part 15
FCCID.......................................B5DM506(TR-500), B5DM504 (TR-600C)
-6-
Initial Equipment Set-Up
Unpacking
Unpack your RadioCom System. A system package
should contain the following Items:
Quantity Descripton
Contact the shipper or your dealer immediately if
anything is damaged or missing. Fill out the registration card and return it to Telex to properly register your unit.
1
1
1
2
1
2
1
1
2
4
Antenna Connection
BTR-500 or BTR-600C Base Station
TR-500 or TR-600C Beltpack
Wall Power Supply
Antennas (one Transmit and one Receive)
Interconnect Cable (9 pin to 9 pin)
Dummy Loads (3 pin XLR male)
Operating Instructions
Warranty and Registration Card
Plastic Screwdrivers
Rubber Feet
Antenna Information
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 receive 1/2-wave antenna to the antenna
input receptacle labeled “Receive” on the right side
of the rear panel. The antenna should be vertically
aligned.
Figure 9
Attaching Receive 1/2-Wave Antenna
-7-
Attach the transmit 1/2-wave antenna to the antenna
input receptacle labeled “Transmit” on the left side
of the rear panel. The antenna should be vertically
aligned.
The antennas can be remoted for better signal path.
A Telex coax assembly and/or a signal splitter/
combiner with remote antennas may be required.
See “Accessory” section for 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 or use a splitter/combiner (SC-600)
with special broad band antennas. See “Example
System Configurations” section for a multiple unit
system using a SC600 and broad band antennas.
Antenna Placement
Proper antenna placement probably has the most effect on your TELEX Wireless Intercom System’s
overall performance. The following suggestions will
result in optimum performance.
Figure 10
Attaching Transmit 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.
HEADSET
A1B
A1B
HEADSET
MIC
MIC
GAIN
GAIN
2
2
VOL
VOL
TALK/
TALK/
OM
OM
CODESWITCH
CODESWITCH
TALK
TALK
T
elex
I/C
I/C
AUDIO
AUDIO
IN
IN
TELEX
TELEX
OUT
OUT
OUT
OUT
IN
IN
CHANNEL
CHANNEL
R
R
RadioCom
RadioCom
1
1
AUTO
AUTO
ON
ON
I/C
I/C
AUX
AUX
B
P
B
P
OUT
2
OUT
2
IN
IN
E
A
E
A
L
L
C
C
ON
ON
OFF
OFF
T
T
K
K
AUX
AUX
BELTPACK
BELTPACK
LOCAL
LOCAL
OFF
OFF
BTR-600C
BTR-600C
SIDETONE
SIDETONE
ANTENNAS MUST BE VERTICAL
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 or
pocket with both antenna’s hung vertically for best
operating range and performance.
elex
T
Figure 11
Vertically Polarized Antenna
Distance between Antennas
The distance between the base station’s receive and
transmit antennas is not adjustable when the antennas are connected directly on the back of the unit.
Figure 12
Proper Dressing of the Antennas
-8-
Keep the distance between the BTR and the TR as
short as possible. The greater the distance, the
weaker the signal. Make sure the “signal paths” between the BTR and TR are unobstructed. You
should be able to visibly locate the antennas at all
times for best performance.
elex
T
elex
T
Attempting to operate the wireless intercom system
through or around walls, ceilings, metal objects, etc.
will reduce system range and performance.
700 FEET
100 FEET
I/C
I/C
AUDIO
AUDIO
IN
IN
OUT
OUT
TELEX
TELEX
OUT
OUT
IN
IN
CHANNEL
CHANNEL
R
R
RadioCom
RadioCom
1
1
AUTO
ON
ON
OFF
OFF
AUTO
I/C
I/C
B
P
B
P
2
2
OUT
OUT
IN
IN
E
E
A
A
L
L
C
C
OFF
OFF
T
T
K
K
AUX
AUX
BELTPACK
BELTPACK
LOCAL
LOCAL
BTR-600C
BTR-600C
SIDETONE
SIDETONE
MIC
MIC
GAIN
GAIN
A1B
A1B
2
2
AUX
AUX
VOL
VOL
TALK/
TALK/
OM
OM
ON
ON
CODESWITCH
CODESWITCH
TALK
TALK
Figure 13
Distance Between base station and
beltpack
elex
T
R
RadioCom
RadioCom
ON
ON
I/C
I/C
B
P
B
P
OUT
OUT
IN
IN
E
A
E
A
L
L
C
C
T
T
K
K
AUX
AUX
BELTPACK
BELTPACK
LOCAL
LOCAL
OFF
OFF
BTR-600C
BTR-600C
SIDETONE
SIDETONE
HEADSET
HEADSET
MIC
MIC
1
1
GAIN
GAIN
AUTO
AUTO
A1B
A1B
2
2
AUX
AUX
2
2
VOL
VOL
TALK/
TALK/
OM
OM
ON
ON
OFF
OFF
CODESWITCH
CODESWITCH
TALK
TALK
elex
T
HEADSET
HEADSET
I/C
I/C
AUDIO
AUDIO
IN
IN
OUT
OUT
TELEX
TELEX
OUT
OUT
IN
IN
CHANNEL
CHANNEL
R
Figure 15
Operating System Near Obstructions
DO NOT - mount the base station 1/2-wave anten-
nas on, or next to metal, such as beams, walls with
metal studs, equipment racks, etc. This also applies
to the antennas when assembled directly to the Base
Station. This will “detune” the antennas which can
result in noise or loss of RF signal at the Base Station, See Figure 15.
HEADSET
A1B
A1B
HEADSET
MIC
MIC
GAIN
GAIN
2
2
VOL
VOL
TALK/
TALK/
OM
OM
CODESWITCH
CODESWITCH
TALK
TALK
RadioCom
ON
ON
OFF
OFF
BTR-600C
BTR-600C
elex
T
1
1
AUTO
AUTO
I/C
I/C
AUX
AUX
B
P
B
P
OUT
2
OUT
2
IN
IN
E
A
E
A
L
L
C
C
ON
ON
OFF
OFF
T
T
K
K
AUX
AUX
BELTPACK
BELTPACK
LOCAL
LOCAL
SIDETONE
SIDETONE
I/C
I/C
AUDIO
AUDIO
IN
IN
TELEX
TELEX
OUT
OUT
OUT
OUT
IN
IN
CHANNEL
CHANNEL
R
R
RadioCom
Figure 14
Keeping Site Clear to Antenna
-9-
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