Lectrosonics UT User manual
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This guide is intended to assist with
initial setup and operation of your
Lectrosonics product.
For a detailed user manual, down-
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Quick Start Guide
UT Handheld Transmitter
17jul07
U.S. Patent 7,225,135
LECTROSONICS, INC.
2
Power LED
On/Off and
Mute Switch
Frequency
Switches
Audio Level Control
Modulation
Level LEDs
Battery
Compartment
Locking ring
Battery
Compartment
Cover
Windscreen
Controls and Functions
Power ON/OFF and Mute Switch
Turns the transmitter on and off, or can be set as an audio mute.
Power LED
Indicates power status and battery strength.
Audio Level Control
The front panel AUDIO LEVEL Control is used to adjust the incoming audio
input level for proper modulation.
Modulation LEDs
The two bicolor Modulation LEDs provide a visual indication of the input audio
signal level from the microphone.
Frequency Select Switches
Two 16-position rotary switches adjust the center frequency of the carrier. The
1.6M is a coarse adjustment and the 100K is the fine adjustment.
Important: Due to the high RF levels surrounding the
transmitter, the sound of the VariMic capsule may be
temporarily affected if the metal windscreen is not in place.
Always make the final decision about sound balance and
quality with the windscreen in place. See the user’s manual
for further information
www.lectrosonics.com 3
The transmitter is powered by a standard alkaline or LiPolymer rechargeable
9 Volt battery. Alkaline batteries will provide about 3.5 hours of operation
while the LiPolymer batteries will operate the transmitter for about 4 hours.
Note: The battery status lamp will function normally only with
alkaline or lithium batteries. Standard zinc-carbon batteries
marked “heavy duty” or “long-lasting” are not adequate. They will
provide only about 30 minutes of operation.
LiPolymer rechargeable batteries will work, but they run down quite abruptly.
Because of this, using the Power LED to verify battery status not reliable with
NiMH batteries. However, a number of Lectrosonics receivers incorporate a
Battery Timer function which tracks the amount of time the transmitter signal
is detected (See your receiver manual to determine if this function is avail-
able.) By using the receiver’s battery timer and replacing the transmitter
battery before the premeasured time is up, you can minimize potential loss of
audio when the batteries are drained.
The battery compartment is located in the lower section of the transmitter,
between the two printed circuit boards. Follow the steps illustrated below to
install a fresh battery.
Note the two differently sized holes in the battery contact pad inside the
Battery Compartment. Insert the battery so that the large hole in the battery
contact pad will line up with the large contact on the battery. A spring-loaded
plunger in the bottom of the compartment (opposite the contact pad) secures
the battery in place.
The battery status is indicated by the Power LED on the bottom panel. The
Power LED glows green when a new battery is installed, then changes to red
as battery condition deteriorates. It begins blinking red as the battery nears
depletion. Battery status is also displayed on the front panel LCD of some
Lectrosonics receivers. See the associated receiver manual for further details.
Note: It is possible to insert the battery backwards and still be able
to close the battery door. No damage will occur but the transmitter
will not operate in this condition.
Battery Installation
LECTROSONICS, INC.
4
Operating Instructions
Selecting the Compatibility Mode
The UT Handheld Transmitter can be used with Lectrosonics 400 Series Digi-
tal Hybrid, 200 Series analog, 100 Series analog and some non-Lectrosonics
analog wireless receivers. Contact the factory for details on the non-Lectro-
sonics models that can be used. The transmitter must be set to the operating
mode of the matching receiver, which is done using the supplied screwdriver
and a battery.
NOTE: The unit is supplied from the factory in Hybrid mode.
1) Ensure the battery is good.
2) Turn off the transmitter.
3) With a small screwdriver (included), set the Frequency Select Switches to
CC. (for Change, Change).
4) Power up the unit briefly – just long enough for the LED’s to light up and
then turn it off - about one second.
5) Change the Frequency Select Switches to one of the following settings:
• To set Lectrosonics 100 Series mode: 1,1
• To set Lectrosonics 200 Series mode: 2,2
• To set Mode 3*: 3,3
• To set Lectrosonics Hybrid mode: 4,4
• To set IFB mode: 5,5
* contact the factory for details
6) Turn the unit on, wait about one second and turn it off again.
7) Change the Frequency Select Switches to 0,0.
8) Turn on the transmitter to complete the operation.
The LEDS will blink to indicate the selected compatibility mode. Immedi-
ately after powerup, all LEDS will blink together red, then green, followed
by the audio level LEDs (-20 and -10) blinking to indicate the mode.
The -20 and -10 LEDs will blink:
• Once for 100 Series mode
• Two times for 200 Series mode
• Three times for Mode 3
• Four times for 400 mode
• Five times for IFB mode
At powerup the transmitter will confirm the current compatibility mode
with the number of blinks listed here. This setting will remain the same
until you reset it with the procedure listed above.
www.lectrosonics.com 5
Adjusting Gain
1) Ensure the battery is in good condition.
2) Mute the associated receiver’s audio output.
3) Turn on the transmitter.
4) Position the transmitter in the location you will use in actual operation.
While speaking or singing at the same voice level that will actually be
used, observe the Modulation LEDs. Adjust the AUDIO LEVEL control
until the –20 dB LED
glows green with oc-
casional red flickers and
-10 dB glows green. This
will set the gain of your
transmitter to between
+0 dB and +10 dB modu-
lation. (See chart at left.)
5) Once the gain has been adjusted, the audio system audio can be turned
on to make level adjustments in the main audio system.
NOTE: The transmitter Audio Level Control 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.
Operating Notes
If the audio level is too high — both LEDs will blink red frequently or glow a
steady red. This condition may reduce the dynamic range of the audio signal.
If the audio level is too low — neither LED will glow, or only the -20 LED will
glow green. This condition may cause hiss and noise in the audio.
Different voices will usually require different settings of the AUDIO LEVEL
control, so check this adjustment as each new person uses the system. 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.
Signal Level -20 LED -10 LED
Less than -20 dB Off Off
-20 dB to -10 dB Green Off
-10 dB to +0 dB Green Green
+0 dB to +10 dB Red Green
Greater than +10 dB Red Red
LECTROSONICS, INC.
6
Frequency Select Switches
Two 16-position rotary switches adjust the
center frequency of the carrier. The 1.6M
is a coarse adjustment and the 100K is the
fine adjustment.
Changing the Frequency
The Frequency Switches are located under the Battery Compartment Cover.
The left switch is for coarse frequency adjustment, and it increments the
operating frequency in 1.6 MHz steps. The right switch is for fine frequency
adjustment and it increments the operating frequency in 100 kHz steps With
the small screwdriver supplied with the kit, turn the left switch to the first char-
acter in the two-digit Transmitter Frequency Switch Setting code, then turn
the right switch to the second character of the two-digit code. For example:
the frequency is 623.000, and two-digit Transmitter Frequency Switch Setting
code is 56, thus lefthand switch on your transmitter should be set to “5” and
the righthand switch to “6”.
Note: If you are using a receiver with a frequency scan function,
find a clear frequency with the receiver, then set the transmitter
to the frequency selected with the receiver. With Lectrosonics
400 Series receivers, a front panel LCD character display will
indicate the correct transmitter switch settings as a two-character
alphanumeric hex code once a clear frequency has been located
with the scan function.
012
3
4
5
6
7
8
9
A
B
C
D
EF012
3
4
5
6
7
8
9
A
B
C
D
EF
1.6M 100K
Coarse Fine
Coarse Fine
Frequency Switches
(set to D8 in this example)
www.lectrosonics.com 7
Power LED
Power On/Off
Switch
Locked Mode
The UT can be placed in a locked mode where the Power switch and the Fre-
quency Switches are disabled. This protects the unit from accidental power-off
or misadjustment after it has been prepared for use.
To enter locked mode, toggle the Power switch off then on again rapidly three
times. The sequence must start with the Power Switch in the On position. Set
the Power Switch to On, then initiate the Locked Mode sequence, i.e., Off-On,
Off-On, Off-On). Each toggle must take no longer than two seconds and
there cannot be more than ten seconds between toggles.
During the first two toggles, the Power
LED will behave normally, blinking slowly
red while the switch is in the off position
to warn that the power will go off, then
returning to normal battery status indication
when the switch is set to On again. After
the third toggle, the Power LED will go out
briefly, then blink the code that indicates
the current Compatibility Mode, just as it
does when the unit is first powered on. The
Power LED going out briefly followed by this
blinking code serves as a confirmation that
the switches are now locked.
Note: Locked Mode can only be
cleared by removing the battery.
Note that since removing the battery
bypasses the normal delayed power-
off circuit, it may cause noise at the
receiver.
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