100 Series
LECTROSONICS, INC.
LM
Power LED
UCR100
Power LED
LM
UH400A
Use fresh alkaline or lithium 9 Volt batter-
ies. In all cases, observe large and small
battery contact openings inside the unit
and orient the battery accordingly prior to
inserting in the battery compartment.
Turn all transmitters OFF. Turn the UCR100 ON. Slide open the door to expose the frequency select switches.
Set the 100 kHz switch to “8.” Rotate the 1.6 MHz switch to a position where the green RF LED on the front
panel does NOT light up. Then, rotate the 100 kHz switch a few detents above and below where it was origi-
nally set while observing the RF LED. The idea is to find switch settings
where the RF LED does not light up, which will be a clear operating
frequency.
NOTE:
Video cameras often generate a
significant amount of RF noise (interference).
Mount the UCR100 on the camera or in the
position it will actually be used with the audio
cable connected, and check the green RF LED
again to see if interference is present. If the RF
LED on the receiver remains lit when the transmitters
are turned off, find new switch settings or re-position the receiver.
The RF LED should extinguish when the associated transmitter is turned off.
UCR100 receiver
Push outward on bottom
then rotate to open.
UH400A transmitter
Slide battery door
out then swing open.
After installing the battery,
turn the unit on and check
to see that the Power LED
is brightly lit.
LM transmitter
Push outward on
bottom then rotate
to open.
Set the frequency selection switches on the side of the transmitter
to match the switches on the receiver determined in Step 2.
Ensure the transmitters are oriented so the
word “Frequency” reads correctly to orient the
left and right hand switches.
Step 1:
Install Batteries
Frequency 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
1.6MHz
100KHz
Step 2:
Check for Interference and Select a Clear Frequency
Step 3:
Set Transmitter Frequency
Frequency 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
1.6MHz
(left)
100KHz
(right)
UH400A Power LED
RF LED
Important Note: Before using transmitters with the UCR100 Receiver, make
sure they are set to 100 Series Compatibility Mode. Refer to your transmitter’s
manual for instructions on how to change compatibility modes.
