Telex TR-34, RadioComTM TT-44, RadioComTM TR-34 Operating Instructions Manual
Telex
Operating Instructions
TM
RadioCom
WIRELESS IFB SYSTEMS
TR-34 TUNABLE RECEIVER
TT-44 TRANSMITTER
R
PROFESSIONAL
WIRELESS IFB SYSTEM
INTRODUCTION
WHAT IS THE TELEX WIRELESS
IFB SYSTEM?
Transmitter: The transmitter generates and
amplifies an RF (Radio Frequency) carrier
signal, modulates this carrier with the microphone signal, and radiates the modulated RF
carrier.
WHAT FREQUENCY BAND DOES
THE TELEX SYSTEM OPERATE
IN?
The Telex Systems features a synthesized
transmitter and a synthesized receiver operating in the VHF Band between 60-72 MHz.
See Table 1 for standard frequencies available.
Figure 1
Block Diagram of Typical Wireless IFB System
Receiver: The FM VHF receiver is tuned to
the frequency of the transmitter. The receiver
picks up the radiated RF signal from the transmitter through the antenna and converts the
RF signal into audio voltages for use with an
earphone, headphone, button receiver,
neckloop, etc. The receiver frequency must be
matched to the transmitter frequency.
Up to five transmitter channels can be utilized
by any number of receivers in any given area.
-1-
OFTEN ASKED QUESTIONS
Question: Can more than one system be
used simultaneously?
Answer: Yes but never on the same fre-
quency. You will need to have different frequencies for every receiver/transmitter
combination. All transmitters are factory set
for specific frequencies.
Question: Is the system more sensitive in
any one particular direction?
Answer: No, the transmitter’s antenna radi-
ates equally in all directions, but the signal is
attenuated by your body, walls or other surrounding objects. The receiving antenna is essentially sensitive in all directions as well.
Question: Can the receiver receive other
transmissions when the transmitter is turned
off?
Answer: Yes it can. Telex systems operate
in the VHF Band between 60-72 MHz. However, it is not susceptible to radio wave skip,
CB’ers or standard FM radio transmissions.
The frequency your system operates on is
computer selected for least interference, but
there is no such thing as a 100% clear channel
all the time, anywhere in the U.S.A., forever!
If the system is going to be used in a permanent fixed location, it should operate interference free until such a time or date when
someone else begins using the same frequency.
If the system is going to be moving among
various locations, you may run into occasional
frequency conflicts.
Whenever the system is in use, the transmitter
should be left on to prevent the receiver from
picking up outside interference.
-2-
CHANNEL FREQ. in MHz
1 64.500
2 64.700
3 64.900
4 65.100
5 65.300
6 65.500
7 65.700
8 65.900
A 66.100
B 66.300
C 66.500
D 66.700
E 66.900
F 67.100
G 67.300
H 67.500
Table 1
Standard Frequencies Available
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TECHNICAL INFORMATION
TR-34 RECEIVER
General Description TR-34
The Telex TR-34 Receiver is a component of
a system which operates on 16 selectable
channels in the 60-72 MHz frequency band.
The receivers are designed to be used with the
Telex TT-44 Transmitter.
Operating Features
Volume OFF/ON Control: This thumbwheel
control serves as both an off/on switch and as
a volume control. The receiver is turned off
when the control is in the extreme counter-clockwise position, when viewed from the
front, and the volume is loudest when the control is in the extreme clockwise position as indicated on the volume control.
NOTE: The Headphone Jack must have a
headphone, or other accessory, plugged in
to activate the TR-34 power “ON”. Power
“ON” is indicated by the lighting of the
channel numbers.
Headphone Jack
The headphone jack accepts a 0.140-inch (3.5
mm) diameter miniature mono or stereo phone
plug. A variety of accessory units can be
plugged into this jack for reception of the desired channel(s) being transmitted.
Treble Control
A push button treble control is provided to enhance the “high” audio when the button is engaged, indicated by , the “High” audio is
emphasized.
Belt Clip
The belt clip supplied is detachable by spreading the wire apart at the tops and removing
one side of the clip from the case and then the
other.
-4-
Figure 2
Operating Features of TR-34
TR-34 Specifications
Temperature Range....................................................................................0 to +50 degrees C
Supply Voltage ..........................................................................2 - 3 Volts, (2) AA Batteries
Battery Life...........................................................................................16 - 20 Hrs - Alkaline
8-10Hrs- Nickel-cadmium
Frequency Response 100-10 kHz ....................................................Less than 3 dB Variation
Sensitivity (12 dB SINAD @ 66.1 MHz)................................................................1 uV max
Distortion..............................................................................................................less than2%
Controls and Connections...............................................................Volume OFF/ON Switch,
Treble Control Switch,
Channel Selection Switch,
Headphone Output Jack
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