Lectrosonics UH110 - Manual (Page 5)

UHF Multi-frequency Plug-on Transmitter
OPERATING INSTRUCTIONS
1) Insert the UH110 into the selected microphone. Listen for the
“click” that indicates the UH110 has locked on to the microphone.
Pull on the mic to insure proper locking has occurred.
TO ATTACH
TO REMOVE
Pull on mic to insure locking.
Press firmly, listen for click.
Depress collar fully.
Hold the
transmitter
case and
rotate the
collar in the
direction
shown. Do
this over a
soft surface
as the
microphone
may pop off
suddenly
Attaching the Microphone
2) Slide the power switch to “ON”.
3) Hold the microphone as you will when you will be using it.
4) Position the microphone in the location you will use in actual
operation.
5) While speaking or singing at the same voice level that will
actually be used, observe the MODULATION LEDs. Adjust the
AUDIO LEVEL control knob until the LEDs begin to light. Start at
a low setting where neither LED lights as you speak. Gradually,
turn the gain up until one LED lights, then the other.
The -20 LED lights when the audio level is about 20dB below full
modulation. The “0” LED lights when the limiter begins to oper­
ate. There is over 30dB of limiting range without overload above
the “0” LED, so it is desirable that the it lights up occasionally
during use.
6) Once the gain has been adjusted, the audio system audio can
be turned on to make level adjustments.
OPERATING NOTES
The AUDIO LEVEL control knob should not be used to control
the volume of your sound system or recorder levels. This gain
adjustment matches the transmitter gain with the user’s voice
level and microphone positioning.
If the audio level is too high -- both LEDs will light frequently or
stay lit. This condition may reduce the dynamic range of the
audio signal.
If the audio level is too low -- neither LED will light, or the -20 LED
will light dimly. This condition may cause hiss and noise in the
audio, or pumping and breathing in the background noise.
The first LED turns on 20dB below full deviation. The “0” LED
turns on at full deviation and indicates that the input shunt
compressor is operating. The input limiter will handle peaks over
30dB above full modulation, regardless of the gain control set­
ting. The limiter uses a true absolute value
circuit to detect both positive and negative
peaks. The attack time is 5 milliseconds and the
release time is 200 milliseconds. Occasional
limiting is desirable, indicating that the gain is
correctly set and the transmitter is fully modu­
lated for optimum signal to noise ratio.
Different voices will usually require different set­
tings of the AUDIO LEVEL control, so check this
adjustment as each new person uses the sys­
tem. If several different people will be using the
transmitter and there is not time to make the
adjustment for each individual, adjust it for the
loudest voice.
ADJUSTING THE TRANSMITTER
FREQUENCY
If you are experiencing interference from another signal on your
frequency, you may want to change the operating frequency of
your system. The left switch changes the operating frequency in
large steps and the right switch changes it in small steps. If you
are experiencing interference, change the operating frequency in
fine steps to find a clear channel. If it is not possible to find a
clear channel using the FINE switch, return it to its original
position and change the COARSE switch by one click then try the
FINE switch again.
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
To gain access to these switches, slide the access door side­
ways with a fingernail.
Note: With the UCR110 receiver, these switches also appear on
the side panel of the receiver. Normally, you should set the
transmitter switches to match the receiver switch settings..
Rio Rancho, NM – USA 5