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Audio Input Jack
Accommodates most lavaliere and dynamic microphones, and line level
signals.
Power ON/OFF Switch
Turns the transmitter on and off.
Power LED
Indicates power status and battery strength.
Audio Level Control
The front panel AUDIO LEVEL Control is used to adjust the incoming audio
input level for proper modulation.
Modulation LEDs
The two bicolor Modulation LEDs provide a visual indication of the input audio
signal level from the microphone.
Frequency Select Switches
Two 16-position rotary switches adjust the center frequency of the carrier. The
1.6M is a coarse adjustment and the 100K is the fine adjustment.
UM400a, UM450:
Antenna
The flexible galvanized steel cable
antenna supplied with the transmit-
ter is removable via an SMA con-
nector. Replacement antennas are
available.
Belt Clip
The belt clip may be removed for
special applications by removing
one hex screw, accessible through
the hole in the belt clip.
WARNING: Use ONLY the screw
that is supplied.
Adjustable Low Frequency
Roll-Off
The 18dB per octave low frequency
roll-off control is used to remove
subsonic (or very low frequency)
audio, often produced by air condi-
tioning systems, automobile traffic
and other sources.
LMa:
Antenna
The flexible galvanized steel cable
antenna is permanently attached to
the transmitter
Belt Clip
The wire belt clip may be removed
for special applications by spreading
the wire away from the housing and
sliding it out of the holes.
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