Operating Instructions; Operating Notes; Adjusting The Transmitter Frequency - Lectronics uh200 Operating Instructions Manual

1) Insert the UH200 into the selected microphone. Listen for the
"click" that indicates the UH200 has locked on to the micro­
phone. Pull on the mic to insure proper locking has occurred.
TO ATTACH
Press firmly, listen for click.
Depress collar fully.
Pull on mic to insure locking.
2) Turn the power switch to the "MUTE" position.
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. Gradu­
ally, 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
operate. There is over 30dB of limiting range without overload
above the "0" LED, so it is desirable that the it lights up 5% to
10% of the time during use.
6) Once the gain has been adjusted, the audio system audio
can be turned on to make level adjustments. Set the power
switch to the ON position and adjust the receiver and/or sound
system level as required. Please note, there will be a delay
between the moment the switch is thrown and the time
when audio will actually appear at the receiver output. This
intentional delay eliminates turn on thumps, and is controlled by
the pilot tone squelch control.

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.

OPERATING INSTRUCTIONS

Attaching the Microphone
Rio Rancho, NM – USA
Frequency Agile Plug-on UHF Transmitter
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
setting. The limiter uses a true absolute value
circuit to detect both positive and negative
peaks. The attack time is 5 milliseconds and
Hold the
the release time is 200 milliseconds.
transmitter
sional limiting is desirable, indicating that the
case and
rotate the
gain is correctly set and the transmitter is fully
collar in the
modulated for optimum signal to noise ratio.
direction
shown. Do
this over a
Different voices will usually require different
soft surface
settings of the AUDIO LEVEL control, so check
as the
microphone
this adjustment as each new person uses the
may pop off
system. If several different people will be using
suddenly
the transmitter and there is not time to make
the adjustment for each individual, adjust it for
TO REMOVE
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
by 1.6 MHz per step and the right switch changes it 100 kHz per
step. If you are experiencing interference, change the operating
frequency in 100 kHz steps to find a clear channel. If it is not
possible to find a clear channel using the 100 kHz switch, return
it to its original position and change the 1.6 MHz switch by one
click then try the 100 kHz switch again.
0 1
F
E
D
C
B
A
9
8
To gain access to these switches, slide the access door side­
ways with a fingernail.
Note: With the UDR200A receiver, these switches also appear
on the front panel of the receiver. Normally, you should set the
transmitter switches to match the receiver switch settings. The
switches are located on the rear panel of the UCR200D
receiver.
With the UDR200B receiver, the front panel LED character
display will indicate the correct transmitter switch settings.
0 1
F
2 E 2
3 D 3
C
4 4
5 B 5
6 A 6
9
7 7
8
Occa­
5