Telex FMR-70 - OFTEN ASKED QUESTIONS; Simultaneous System Use; Transmitter Antenna Sensitivity; Receiver Interference When Off

OFTEN ASKED QUESTIONS
^^uestions: Can more than one wireless sys¬
tem be used simultaneously?
A^nswer: Yes, Over a dozen systems can be
operated in a single location simultaneously,
however, for every transmitter there must be a
receiver on the same frequency. Each addition¬
al receiver/transmitter system must be on a
different frequency.
^^uestion: Is the system more sensitive in
any one particular direction?
A.nswer: No, the transmitter antenna radiates
equally in all directions, but the signal is at¬
tenuated by your body, walls or other sur¬
rounding objects. The receiving antenna is
essentially sensitive in all directions as well,
except when using a directional antenna.
C^uestion: When the transmitter is turned off
can the receiver pick-up other transmissions?
Answer: Yes it can. The Telex FMR-70 Sys¬
tem operates in the VHP Band between 150-
216 MHz. However, it is not susceptible to
radio wave skip, CB’ers or FM Radio trans¬
missions. The frequency your system operates
on has been computer selected for least inter¬
ference, but there is no such thing as a 100%
clear channel aU the time, anywhere in the
U.S.A., forever!
If the system is going to be used in a per¬
manent fixed location, the system 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 will inevitably run into
occasional frequency conflicts.
In either case, when you’re not using the wire¬
less microphone, turn the gain down on your
audio mixer, just as you would a wired
microphone. If mixer control is not available,
turn the receiver off when the transmitter is not
in use. This will prevent the reception of un¬
desired signals. If no mixer control is available
and the system must be left on, the transmitter
should be left on to prevent the receiver from
picking up outside interference.
f^uestion: Is Feedback a problem?
Answer: As with all microphones used in PA
applications, feedback is a problem. To mini¬
mize feedback, the mixer or control operator
should use the minimum level to produce the
desired audio. If the system then appears to be
overly sensitive, reduce the "Microphone
Gain" on the back of the transmitter with a
small plastic screwdriver (One is supplied
with your transmitter) until you obtain the
minimum level necessary. NOTE: Using a
metal screwdriver may detune your units fre¬
quency. This is the best way of adjusting
"Microphone Gain." Use the minimum gain
necessary. Professional equalization of the
sound system may be needed.
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