Lectrosonics LT Series User manual

Fill in for your records:

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

Digital Hybrid

Wireless® Belt-Pack

Transmitter

LT, LT/E06, LT/X

U.S. Patent 7,225,135

Quick

Start

Guide

18 July 2019

LECTROSONICS, INC.2

Controls and Features

PWR/FUNC

-10

-20

AUDIO

623.400

-40 -20 0

494.500

-40 -20 0

b 19

RF Indicator

Battery icon

IR Sync Port

Battery Status

LED

Navigation

Buttons

Power Button

Input Jack

Programmable Switch

Power/Function

LED

Modulation

LEDs

Full access to all settings is provided through the keypad and LCD. The trans-

mitter can also be conﬁgured as a “one button” device by locking the ability to

make changes with the keypad, and conﬁguring the top panel switch as either

power on/off or a mute function.

www.lectrosonics.com 3

Keypad and LCD Interface

623.400

-40 -20 0

494.500

-40 -20 0

b 19

IR Port

BATT LED

Glows green when the batteries are good. As the batteries are drained, the

LED will turn to a steady red at a mid-point during their life, then begin to blink

red when only a few minutes of operation remain.

MENU/SEL Button

Pressing this button enters the menu and selects menu items to enter the

setup screens.

BACK Button

Pressing this button returns to the previous menu or screen.

Power Button

Turns the unit off and on and enters the power menu.

Arrow Buttons

Used to navigate the menus.

IR (infrared) Sync

The opening on the keypad is an IR port for quick setup using a receiver with

this function available. IR Sync will transfer the settings for frequency, step

size and compatibility mode from the receiver to the transmitter.

NOTE: If a mismatch exists between the receiver and transmitter, an

error message will appear on the transmitter LCD stating what the

problem is.

LECTROSONICS, INC.4

Navigating the Menus

Menu setup items are arranged in a vertical list on the LCD. Press MENU/SEL

to enter the menu, then navigate with the UP and DOWN arrows to highlight

the desired setup item. Press MENU/SEL to enter the setup screen for that

item.

Gain

SEL

BACK

Gain 22

Use arrow keys to

select input gain

LineIn

Freq.

ProgSw

Rolloff

Compat

StepSiz

Phase

Locked

Rf On?

BatType

Remote

TxPower

Default

SEL

BACK

Use arrow keys to select

audio output polarity

Line

Instr.

Polarity

SEL

BACK

Freq Press SEL to

select desired

adjustment

Use arrow keys

to select desired

frequency

SEL

BACK

ProgSw

Use arrow keys to select

LCD backlight duration

TalkBk

Power

Mute

(none)

SEL

BACK

SEL

BACK

Compat Select from

listing

Use arrow keys to select

compatibility mode

SEL

BACK

Use arrow keys to select

frequency step size

100 kHz

25 kHz

StepSiz

SEL

BACK

Use arrow keys to select

audio output polarity

Pos.

Neg.

Phase

SEL

BACK

Use arrow keys to

lock/unlock keypad

Yes

Locked?

SEL

BACK

Use arrow keys to turn Rf

signal on/off

Yes

Rf On?

SEL

BACK

Use arrow keys to

choose battery type

Alk.

Lith.

BatType

SEL

BACK

Use arrow keys to

enable/disable remote

Enable

Ignore

Remote

SEL

BACK

Use arrow keys to select

RF power output

50 mW

100 mW

TxPower

SEL

BACK

Use arrow keys to return

transmitter to default factory

settings

Yes

Default

settings

Rolloff

70 Hz

Use arrow keys to

select input gain

Select from

listing

b 21

550.400

Select from

listing

Hybrid

www.lectrosonics.com 5

Power Menu

Pressing the power button when the unit is turned on will display a menu

with several options:

• Resume - returns to the previous mode and screen

• Pwr Off - turns the unit off irrevocably

• Rf On? - enters a screen to enable the operating or standby modes

• AutoOn? - allows the unit to automatically power back up after a power

failure or when new batteries are installed (works in the operating mode

only)

• Backlit - the backlight can be turned on conitnuously or set to turn off

automatically after either 30 seconds or 5 minutes.

• LED Off - gives you the option of the battery indicator light normal or

dark.

• About - Indicates latest ﬁrmware version

Resume

Rf On?

AutoOn?

Pwr Off

Resume and Pwr Off

will execute

the command

immediately

Resume

Pwr Off

Rf On?

AutoOn?

Rf On?

Ye s

Resume

Rf On?

AutoOn?

Pwr Off

AutoOn?

Ye s

Resume

Rf On?

AutoOn?

Pwr Off

Rf On?

AutoOn?

Backlit

LED Off

AutoOn?

Backlit

LED Off

About

Pwr Off

Rf On?

AutoOn?

Backlit

The next two menu

items will open a

screen asking for a

Yes or No answer

LECTROSONICS, INC.6

System Setup Procedures

Summary of Steps

1) Install good batteries and turn power on.

2) Set the compatibility mode to match the receiver.

3) Connect the signal source and adjust input gain for optimum

modulation level.

4) Set Step Size and frequency to match receiver. Also see receiver

manual for scanning procedure to ﬁnd a clear operating frequency.

5) Turn on the receiver and verify that solid RF and audio signals are pres-

ent (see receiver manual).

1) Install Batteries

Insert the batteries according to the markings on the back of the housing.

2) Set Compatibility Mode

When used with a Lectrosonics Digital Hybrid Wireless®receiver, the best

audio quality will be achieved with the system set to the Nu Hybrid compat-

ibility mode.

Rolloff

Compat

StepSiz

Phase

Compat

Nu Hybrid

Use the UP and DOWN arrows to select the desired mode, then press the

BACK button twice to return to the Main Window.

Compatibility modes are as follows:

Receiver Models

• Nu Hybrid

• IFB

• Mode 3

www.lectrosonics.com 7

3) Adjusting Input Gain

The two bicolor Modulation LEDs on the control panel and keypad provide a

visual indication of the audio signal level entering the transmitter. The LEDs

will glow either red or green to indicate modulation levels as shown in the

following table.

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

NOTE: Full modulation is achieved at 0 dB, when the “-20” LED ﬁrst

turns red. The limiter can cleanly handle peaks up to 30 dB above this

point.

It is best to go through the following procedure with the transmitter in the

standby mode so that no audio will enter the sound system or recorder during

adjustment.

1) With fresh batteries in the transmitter, power the unit on in the standby

mode (see previous section Powering On in Standby Mode).

2) Navigate to the Gain setup screen.

Gain

LineIn

Freq.

ProgSw -40 -20 0

Gain

3) Prepare the signal source. Position a microphone the way it will be used

in actual operation and have the user speak or sing at the loudest level

that occur during use, or set the output level of the instrument or audio

device to the maximum level that will be used.

4) Use the and arrow buttons to adjust the gain until the –10 dB glows

green and the –20 dB LED starts to ﬂicker red during the loudest peaks

in the audio.

5) Once the audio gain has been set, the signal can be sent through the

sound system for overall level adjustments, monitor settings, etc.

6) If the audio output level of the receiver is too high or low, use only the

controls on the receiver to make adjustments. Always leave the trans-

mitter gain adjustment set according to these instructions, and do not

change it to adjust the audio output level of the receiver.

Continued on Next Page

LECTROSONICS, INC.8

4) Select Step Size

This menu item allows frequencies to be selected in either 100 kHz or 25 kHz

increments.

Rolloff

Compat

StepSiz

Phase

StepSiz

100 kHz

25 kHz

StepSiz

100 kHz

25 kHz

If the desired frequency ends in .025, .050 or .075 MHz, the 25 kHz step size

must be selected.

Normally, the receiver is used to ﬁnd a clear operating frequency. All Lectro-

sonics Digital Hybrid Wireless®receivers provide a scanning function to quick-

ly and easily ﬁnd prospective frequencies with little or no RF interference. In

other cases, a frequency may be speciﬁed by ofﬁcials at a large event such as

the Olympics or a major league ball game. Once the frequency is determined,

set the transmitter to match the associated receiver.

Selecting Frequency

The setup screen for frequency selection offers several ways to browse the

available frequencies.

Gain

LineIn

Freq.

ProgSw

Freq.

b 19

494.500

Press MENU/

SEL to select

one of four

ﬁelds to make

adjustments

Each ﬁeld will step through the available frequencies in a different increment.

The increments are also different in the 25 kHz mode from the 100 kHz mode.

Freq.

b 19

494.500

Freq.

b 19

494.500

These two ﬁelds step in 25

kHz increments when the

step size is 25 kHz and 100

kHz increments when the

step size is 100 kHz.

Freq.

b 19

494.500

Freq.

b 19

494.500

These two ﬁelds

always step in the

same increments

1 MHz steps

1 block steps

www.lectrosonics.com 9

A fraction will appear next to the hex code in the setup screen and in the main

window when the frequency ends in .025, .050 or .075 MHz.

494.525

-40 -20 0

b 19

MUTE

Freq.

b 19

494.525

511

Fraction appears

next to hex code

in 25 kHz mode

Selecting Frequency Using Two Buttons

Hold the MENU/SEL button in, then use the and arrow buttons for alter-

nate increments.

Freq.

b 19

494.500

1 block steps

1.6 MHz steps to

nearest 100 kHz

channel

1 MHz step 100 kHz steps

to next 100 kHz

channel

100 kHz Mode

Freq.

b 19

494.525

511

1 block steps

1.6 MHz steps

1 MHz step

25 kHz steps

25 kHz Mode

If the Step Size is 25 kHz with the frequency set between even 100 kHz steps

and the Step Size is then changed to 100 kHz, the mismatch will cause the

hex code to display as two asterisks.

494.525

-40 -20 0

b 19

MUTE

Freq.

b 19

494.500

Step Size and

Frequency

mismatch

LECTROSONICS, INC.10

Main Window Indicators

The Main Window displays the block number, Standby or Operating mode,

operating frequency, audio level, battery status and programmable switch

function. When the frequency step size is set at 100 kHz, the LCD will look

like the following.

494.500

-40 -20 0

b 19

MUTE

Block number

Frequency (MHz)

Frequency

(hex number)

Operating mode

Battery status

Programmable

switch function

Audio level

When the frequency step size is set to 25 kHz, the hex number will appear

smaller and may include a fraction.

Note that the

frequency has

increased by 25

kHz from the upper

example.

494.525

-40 -20 0

b 19

MUTE

Fraction

1/4 = .025 MHz

1/2 = .050 MHz

3/4 = .075 MHz

Changing the step size never changes the frequency. It only changes the way

the user interface works. If the frequency is set to a fractional increment be-

tween even 100 kHz steps and the step size is changed to 100 kHz, the hex

code will be replaced by two asterisks on the main screen and the frequency

screen.

494.525

-40 -20 0

b 19

MUTE

Freq.

b 19

494.525

Frequency set to

fractional 25 kHz

step, but step size

changed to

100 kHz.

If the programmable switch function is set for Mute, the Main Window will

indicate that the function is enabled.

494.500

-40 -20 0

b 19

MUTE

Mute function

enabled but

not active

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