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INTRODUCTION
WHAT IS THE TELEX WIRELESS IFB
SYSTEM?
Trans mit ter: The trans mit ter gen er ates and am pli -
fies a RF (Ra dio Fre quency) car rier sig nal, mod u -
lates this car rier with the mi cro phone sig nal, and
ra di ates the mod u lated RF car rier.
Re ceiver: The FM VHF re ceiver is tuned to the fre -
quency of the trans mit ter. The re ceiver picks up the
ra di ated RF sig nal from the trans mit ter through the
an tenna and con verts the RF sig nal into au dio volt -
ages for use with an ear phone, head phone, but ton
re ceiver, neckloop, etc. The re ceiver fre quency must
be matched to the trans mit ter fre quency.
WHAT FREQUENCY BAND DOES THE
TELEX SYSTEM OPERATE IN?
The Telex Sys tems fea ture a syn the sized trans mit ter
and a syn the sized re ceiv er op er at ing in the VHF
Band be tween 64-68 MHz. See Ta ble 1 for stan dard
fre quen cies avail able.
Each trans mit ter chan nel can be uti lized by any
num ber of re ceiv ers in any given area. Up to five si -
mul ta neous sys tems can be used in a given area.
-1-
SOUND
SOURCE
TRANSMITTER
ANT.
ANT.
RF CARRIER
SIGNAL
FM
RECEIVER
EARPHONE
Fig ure 1
Block Di a gram of Typ i cal Wire less IFB Sys tem