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Lectrosonics UM450 User Manual Page 6

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UM450
Controls and Functions
Input Jack
Power LED
Power ON/OFF Switch
AUDIO LEVEL Control
Modulation LEDs
ANTENNA Jack
Input Jack
The input on the UM450 accommodates virtually every
lavaliere, hand-held or shotgun microphone available.
Different line level signals can also be accommodated.
(See Line Level Signals and Transmitter 5-Pin Input
Jack Wiring.)
Power ON/OFF Switch
Turns the transmitter on and off. Even when the switch
is turned off or on abruptly, the pilot tone muting system
prevents “thumps” or transients from occurring.
Power On LED
The Power LED glows green when the battery is good
and the transmitter is turned on. The LED will glow
yellow/orange as the battery voltage drops and finally
glows red when there are about 30 minutes of operation
left (when using the recommended battery). The LED
blinks red when there are only a few minutes of life left.
Low Frequency Roll Off
Control
1.6M 100K
Frequency Select Switches
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
NOTE: While a NiMH battery provides long
operating time, it will give little or no warning when
depleted. If you use a NiMH battery in the UM450,
we recommend trying a fully charged battery in
the unit, noting the length of time that the battery
will run the unit and in the future use somewhat
less than that time to determine when the battery
needs to be replaced.
A weak battery will sometimes light the Power LED to
the “good” green indication immediately after being put
in the unit, but will quickly discharge to the point where
the LED will go red or shut down (just like a flashlight
with “dead” batteries). If the lamp fails to light, the bat-
tery should be replaced.
Audio Level Control
The front panel AUDIO LEVEL Control is used to adjust
the incoming audio input level for proper modulation.
LECTROSONICS, INC.
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