Lectrosonics UM400 - Manual (Page 8)

UM400
Input Jack
Power ON/OFF Switch
AUDIO LEVEL Control
Modulation LEDs
ANTENNA Jack
Power LED
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
Low Frequency Roll Off
Control
Controls and Functions
Input Jack
The input on the UM400 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 alkaline battery).
The LED blinks red when there are only a few minutes
of life left.
1.6M 100K
Frequency Select Switches
NOTE: A NiMH battery will give little or no warning
when it is depleted. If you wish to use NiMH
batteries in the UM400, we recommend trying fully
charged batteries in the unit, noting the length
of time that the batteries 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.
Audio Level
Used to adjust the audio input level for the proper
modulation.
 LECTROSONICS, INC.