Telex RadioCom TR-200 User manual

Telex
Operating Instructions
MODEL TR-200, TR-200P
WIRELESS
BELT-PACK
TRANSCEIVER
TELEX
RadioCom

Table of Contents
Page
INTRODUCTION .......................................................................................................1
General Description ...............................................................................................1
Block Diagram...................................................................................................2
TECHNICAL INFORMATION ..................................................................................3
Controls and Connections......................................................................................3
Features..................................................................................................................4
Volume ON/OFF Control..................................................................................4
Low Battery and Over Modulation Indicator LED ......................................... 4
Push-To-Talk/Lock-To-Talk Switch .................................................................5
Transmit LED Indicator ....................................................................................5
Headset Jack ......................................................................................................5
Belt Clip.............................................................................................................5
Microphone Gain Control..................................................................................5
Dynamic/Electret Switch ...................................................................................5
Battery Compartment.........................................................................................5
SPECIFICATIONS ......................................................................................................6
SET-UP........................................................................................................................7
Unpacking..............................................................................................................7
Headset Connection ...............................................................................................7
Dynamic/Electret Switch .......................................................................................7
Battery Installation.................................................................................................8
Battery Check ........................................................................................................9
Battery Removal ....................................................................................................9
Dressing the Unit.................................................................................................10
OPERATION .............................................................................................................11
Power ...................................................................................................................11
Push-to-Talk/Lock-to-Talk Switch......................................................................11
Adjusting Microphone Gain ................................................................................12
BATTERY INFORMATION .....................................................................................13
General.................................................................................................................13
Alkaline Batteries ............................................................................................13
Nickel-Cadmium Batteries ..............................................................................13
BC-4 Battery Charger......................................................................................13
FCC INFORMATION ...............................................................................................14
RECOMMENDED HEADSETS...............................................................................14
ACCESSORIES.........................................................................................................17
WARRANTY SERVICE INFORMATION...............................................................20
-i-

INTRODUCTION
General Description
The Telex Model’s TR-200 and TR-200P Belt-pack Transceivers, are designed
with one transmit and one receive channel and will operate on selected frequencies
within the 150 to 216 MHz band.
The TR-200 Transceiver operates in the continuous transmit mode with the audio,
or talk, activated by a switch. As many as four TR-200 belt-pack transceivers can
operate in a fully duplex network with one Telex Model BTR-200 or BTR-200 II
Base Station.
The TR-200P Transceiver operates in the Push-to-Transmit mode (the transmit and
talk function are activated together). Any number of TR-200P transceivers can be
used in a half-duplex network with one BTR-200 or BTR-200 II Base Station. Op-
erate only one transmitter at a time. Attempting to use two transmitters simulta-
neously on the same channel will cause interference.
Both the TR-200 and TR-200P can be configured to operate with another TR-200
or TR-200P.
The receiver portion of the TR-200 and TR-200P consists of a crystal controlled
dual conversion superheterodyne design.
The transmitter portion of the TR-200 and TR-200P consists of a crystal controlled
multiplier/amplifier design.
-1-

Figure 1
Block Diagram of TR-200 Transceiver
-2-

TECHNICAL INFORMATION
Controls and Connections
Figure 2
External controls and Connections
-3-
BELT CLIP
LOW BATTERY / OVERMODULATION
INDICATOR LED
TALK INDICATOR LED
PUSH-TO-TALK/
LOCK-TO-TALK SWITCH
VOLUME ON/OFF CONTROL
HEADSET JACK
TRANSMIT ANTENNA
RECEIVE ANTENNA
R

Figure 3
Internal Controls
Features
Volume ON/OFF Control: This thumbwheel control serves as both an on/off
switch and as a volume control. The transceiver is turned off when the control is in
the extreme counterclockwise position, when viewed from the front, and the vol-
ume is loudest when the control is in the extreme clockwise position.
Low Battery and Over Modulation Indicator LED: (labeled “bat/ovmod”)
Low Battery Indicator: Part of the battery check circuit. When the volume
ON/OFF Control is placed in the “ON” position the LED will flash one time if
the battery is good. A poor battery will cause the LED to illuminate continu-
ously and a bad or unusable battery will not cause any illumination at all.
Over Modulation Indicator: Uses the same LED as the low battery indicator.
During the transmit mode if microphone gain is too high the LED will illumi-
nate when talking. Adjust microphone gain.
-4-
FCC ID: B5DTR200
S/N:
P/N:70681-
ED
BATTERY COMPARTMENT
DYNAMIC / ELECTRET
SWITCH
ACCESS TO MICROPHONE
GAIN CONTROL

Push-to-Talk/Lock-to-Talk Switch:
For Model TR-200, this switch enables the talk function. Press the button
and hold down as long as required (Push-to-talk function), or if continuous
talk is required (lock-to-talk function), quickly press the button two times to
lock on. To release the talk function, press the button one time.
For Model TR-200P, this switch enables the transmit and audio function
and operates as described for TR-200.
Transmit LED Indicator: (Labeled “talk”) Will be illuminated whenever the
transmit function is enabled.
Headset Jack: 4 Pin XLR Connector for Input/Output. The headset jack will ac-
cept 5 different Telex Model headsets and 1 handset. See Recommended Headsets
starting on Page 14.
Figure 4
Headset Jack Wiring
Belt Clip: Combination Belt Clip/Battery Cover. Access to Battery Compartment,
Microphone Gain Control and Dynamic/Electret Switch is accomplished by re-
moval of belt clip via a quick release 1/4 turn fastener.(See Page 8)
Microphone Gain Control: Screwdriver adjustable by removing belt clip and pry-
ing out the small rubber plug to the right of the screw boss. Adjust the gain control
clockwise to increase microphone gain or counterclockwise to decrease micro-
phone gain. Replace rubber plug.
Dynamic/Electret Switch: Place switch towards “D” when using a Dynamic Mi-
crophone or “E” when using an Electret Microphone.
NOTE: All Telex headsets used with this intercom are dynamic microphones. Unit
is shipped in the “D” position.
Battery Compartment: Holds 6 AA batteries in a removable battery holder.
-5-
BTR-200/TR-200
MALE CONNECTORS
1
23
4
MICROPHONE
SHIELD (-)
MICROPHONE
AUDIO (+)
HEADPHONE
BALANCED
AUDIO
OUT

-6-
SPECIFICATIONS
Overall
Power Requirements....................6 AA cells (Alkaline, NEDA, MN 1500)
Nickel Cadmium Optional
Current Drain..........................................................................typical 65 mA
Temperature Range......................................-4°Fto130°F (-20°Cto55°C)
Dimensions.....................................................4.25" W x 4.125" H x 2.0" D
(108mm x 105mm x 51mm)
Weight................................................................13 oz (369g) with batteries
Transmit Antenna ..................................................1/4-wave wire (attached)
Receive Antenna....................................................1/4-wave wire (attached)
Transmit
RF Frequency Range ..............................................................150-216 MHz
RF Frequency Stability .....................................Crystal Controlled, 0.005%
RF Power Output..................................................................50 mW Typical
Modulation..............................................................FM, 5000 Hz deviation,
100 micro-seconds Pre-emphasis
Modulation Limiter.......................................................Internal Compressor
Modulation Frequency Range................................300 to 5000 Hz +/-2 dB
Microphone Audio Input....................................................30 to 3500 ohms
Microphone Input Sensitivity......................2 mV Dynamic, 4 mV Electret
Radiated Harmonics and Spurious Emissions................................-45 dBC,
Exceeds FCC Specifications
FCC Acceptance..............................Type Accepted Under Parts 90 and 74
Receive
RF Frequency Range ..............................................................150-216 MHz
RF Frequency Stability .....................................Crystal Controlled, 0.005%
Type................................................Dual Conversion Superheterodyne, FM
RF Sensitivity......................................Less than 0.5 µV for 12 dB SINAD
IF Selectivity .............................................3 dB at 30 kHz (Ceramic Filter)
Image Rejection ....................................................................70 dB or better
Squelch Quieting..................................................................................90 dB
Squelch Threshold..............................................................3.0 µV (internal)
Signal-to-Noise Ratio ..........................................................................90 dB
Audio Output............................................32 mW into 600 ohms (Headset)
Distortion ......................................................Less than 1% at Rated Output

SET-UP
Unpacking: Unpack your TR-200 System. If there are any defects or shortages, re-
fer to the “Warranty Service Information” section in this manual.
Headset Connection: Insert the headset/microphone into the connector on the bot-
tom of the unit. See the microphone connection diagram (Figure 4) if unit other
than Telex is used.
Figure 5
Connecting Headset
Dynamic/Electret Switch: If the headset you are using has an Electret micro-
phone, the dynamic/electret switch must be in the “E” position (Electret). This
switch is accessible by removing the belt clip and removing the battery holder. A
+5 volt bias is available at the microphone plug for electret use.
If you are using a headset with a dynamic microphone, place the dynamic/electret
switch in the “D” position (Dynamic). Refer to Figure 6.
NOTE: FOR PROPER OPERATION YOU MUST MATCH THE TYPE OF MI-
CROPHONE YOU ARE USING WITH THE DYNAMIC/ELECTRET SWITCH
LOCATED INSIDE THE UNIT.
-7-
TO HEADSET
R

Figure 6
Dynamic/Electret Switch
Battery Installation: Assure that the OFF/ON Volume control knob is turned OFF.
Gain access to the battery compartment by removing the belt clip on the back of
the unit. Release the 1/4 turn fastener located on the back of the belt clip and re-
move the belt clip/cover. Refer to Figure 7.
Remove the battery holder from the box. Insert six (6) AA batteries in the holder,
paying close attention to polarities of the batteries.It may be necessary to turn the
batteries with the thumb and forefinger the first few times the batteries are inserted
into the battery holder to Assure good positive contact. Insert the holder into the
case and replace the belt clip/battery cover and engage the 1/4 turn fastener.
Figure 7
Battery Installation
-8-
FCC ID: B5DTR200
S/N:
P/N:70681-
ED
ELECTRET DYNAMIC
REMOVE BELT CLIP