Telex FMR-70 - SETTING SYSTEM GAIN LEVELS; WT-55 Transmitter Power On; HT-100 Microphone Power On; Gain Level Adjustment Guide

WT-55 BELT TRANSMITTER _
Turn your transmitter power "ON”. This is ac¬
complished by placing the power on switch to
"ON"
Figure 23
Power ON Switch
NOTE: For the HT-200, when the unit is
turned on, the Low Battery LED will flash on
briefly with fresh batteries installed. It will stay
on continuously with a low battery and will not
illuminate at all with a bad or unusable battery.
The battery of the WT-55 will need to be tested
by pushing the battery test button. The LED
will light with good batteries installed.
HT-ICM) MICROPHONE
Set the HT-200 Power Switch to the "ON"
position.
Figure 24
Power ON/OFF switch - IIT-2CM)
SETTING SYSTEM GAIN LEVELS
WT-55 AND HT-100 SOUND PRESSURE
LEVEL (SPL) _
Normal (SPL) Setting: The "Audio Gain"
potentiometer on your transmitter has been fac¬
tory set to provide readings on the FMR-70
four segment bar graph in the -20 /-8 area for
normal vocal application. Readings in this area
of the meter give highest dynamic range and no
overload. See Figure.26.
ffigh Level Setting: If your appication is in a
high SPL (Sound Pressure Level) area such as
singing or instrumentation, the factory gain set¬
ting is probably too high. This will result in
overloading your receiver, which will result in
distortion.
Low Level Setting: If your application is low
level, such as a very soft spoken individual or a
situation where the handheld transmitter is not
going to be "close talked", the factory gain set¬
ting may be too low and could result in poor
overall signal-to-noise ratio.
To correct either a too high, or too low condi¬
tion, simply use the gain adjustment on your
transmitter (either the Hi/Lo Switch or the ad¬
justment potentiometer for fine tuning) and ad¬
just the Microphone Gain Control so that
average audio causes the meter to indicate in
the left (-20 and -8) area of your meter. An
occasional overshoot into the 0 or +2 area is
allowable.