Lectrosonics UM400a Manuel utilisateur

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Guide

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Serial Number:

Purchase Date:

This guide is intended to assist with

initial setup and operation of your

Lectrosonics product.

For a detailed user manual, down-

load the most current

version at:

www.lectrosonics.com/manuals

Standard Belt-Pack

Transmitters

UM400a

UM450

LMa

06 jun10

U.S. Patent 7,225,135

LECTROSONICS, INC.2

Controls and Functions

UM400a, UM450

transmitters

Input Jack

Power LED

Power ON/OFF

Switch

AUDIO LEVEL

Control

Modulation

LEDs

Antenna Jack

Input Jack

AUDIO LEVEL

Control

Modulation

LEDs

Power LED

Power ON/OFF

Switch

Antenna

1.6M 100K

Frequency Select

Switches

012

EF012

Sliding Door

CIRCULATOR/ISOLATOR

1.6M 100K

Frequency Select

Switches

012

EF012

Low Frequency Roll Off

Control

LMa transmitter

www.lectrosonics.com 3

Audio Input Jack

Accommodates most lavaliere and dynamic microphones, and line level

signals.

Power ON/OFF Switch

Turns the transmitter on and off.

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.

UM400a, UM450:

Antenna

The ﬂexible galvanized steel cable

antenna supplied with the transmit-

ter is removable via an SMA con-

nector. Replacement antennas are

available.

Belt Clip

The belt clip may be removed for

special applications by removing

one hex screw, accessible through

the hole in the belt clip.

WARNING: Use ONLY the screw

that is supplied.

Adjustable Low Frequency

Roll-Off

The 18dB per octave low frequency

roll-off control is used to remove

subsonic (or very low frequency)

audio, often produced by air condi-

tioning systems, automobile trafﬁc

and other sources.

LMa:

Antenna

The ﬂexible galvanized steel cable

antenna is permanently attached to

the transmitter

Belt Clip

The wire belt clip may be removed

for special applications by spreading

the wire away from the housing and

sliding it out of the holes.

LECTROSONICS, INC.4

Operating Instructions

Selecting the Compatibility Mode

The UM400a, UM450, and LMa can be used with Lectrosonics 400 Series

Digital Hybrid, 200 Series analog, 100 Series analog and some non-Lec-

trosonics analog wireless receivers. Contact the factory for details on the

non-Lectrosonics 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. The UM400a and UM450 are functionally identi-

cal, while the LMa lacks the manual low-frequency rolloff control. The LMa

has an output of 50mW, the UM400a has 100mW output, and the UM450 has

250mW output.

NOTE: The unit is supplied from the factory in the 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

• To set Mode 6*: 6,6

* contact the factory for details

6) Turn the unit on, wait about one second and turn 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. Im-

mediately after power up, 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

 •SixtimesforMode6

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

Attaching a Microphone and Adjusting Gain

1) Ensure the battery is in good condition.

2) Insert the microphone plug into the input jack, aligning the pins; be sure

that the connector locks.

3) Attach the antenna to the SMA connector on the top of the transmitter.

4) Mute the associated receiver’s audio output.

5) Turn on the transmitter.

6) Position the microphone 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 so

peaks are between +0

dB and +10 dB modula-

tion.

7) Once the gain has been adjusted, the mixer or recorder can be turned on

to make level adjustments.

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 no 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

012

EF012

012

EF012

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

Locate the two small rotary switches. (On the UM400a/UM450, slide open

the small door on the side of the transmitter.) With the small screwdriver

supplied with the kit, turn the left

switch to the ﬁrst character 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 display is 623.000,

and two-digit Transmitter Frequency

Switch Setting code is 56, thus the lefthand switch

on your transmitter should be set to “5” and the

righthand switch to “6”.

Note: Be sure to orient the transmitter so the

nomenclature reads correctly (not upside down).

If you are using a receiver with a frequency scan function, ﬁnd a clear fre-

quency with the receiver, then set the transmitter to match. 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

EF012

1.6M 100K

TransmitterFrequency

Select Switches

012

EF012

5 6

www.lectrosonics.com 7

Battery Installation

UM400a/UM450

To open the battery compartment,

press outward on the cover door in

the direction of the arrow as shown

in the illustration. Only ﬁrm, sliding

pressure is needed to open and

close the battery door. Swing the

door open and take note of the

polarity marked inside showing

the location of the positive (+) and

negative (-) terminals. You can also

see the large and small contact

holes inside the battery compart-

ment with the door open.

Insert the battery correctly and

close the cover by pressing the door

closed and across, reversing the

opening procedure. If the battery is

inserted incorrectly, the door will not

close. Do not force the door closed.

LMa

To replace the battery, push up on

the Battery Compartment Door and

rotate it clockwise. Remove the old

battery and take note of the polarity

marked inside showing the location

of the positive (+) and negative (-)

terminals. (You can see the large

and small contact holes inside the

battery compartment with the door

open.)

Insert the new battery correctly

and close the Battery Compart-

ment Door by reversing the opening

procedure. If the battery is inserted

incorrectly, the door will not fully

close. Do not force the door closed.

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 nally glows red when there are about 30 minutes of operation left (when

using an alkaline battery). The LED then blinks red when there are only a few

minutes of life left.

NOTE: While a LiPolymer battery provides long operating time, it will

give little or no warning when depleted. If you use a LiPolymer battery

in the UM450, we recommend trying a fully charged battery in the unit,

noting the length of time that the battery 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 indica-

tion 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 battery should be replaced.

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