Lectrosonics DHu Quick Start Guide

Quick
Start
Guide

DHu

Digital Handheld Transmitter

Fill in for your records:

Serial Number:

Purchase Date:

U.S. Patent 7,225,135

This guide is intended to assist with
initial setup and operation of your
Lectrosonics product.

For a detailed user manual, down­load the most current
version at:

www.lectrosonics.com

8 May 2019

Mechanical Assembly

A mic capsule is
threaded onto the body
of the transmitter in the

direction shown.

Do not overtighten it.

The threaded interface is a 1.25”

diameter opening with 28 threads

per inch and three contact rings

The lower housing opens by rotating

it in the direction shown. After the

threads are disengaged, pull the

housing downward until it engages

the detent that holds it open.

Microphone Capsules:

Lectrosonics offers two types of capsules. The HHC is the standard capsule
and the HHVMC is the Variable Mic Capsule which includes adjustments for
Bass, Midrange and Treble.

HHC Lectrosonics
cardioid electret

HHVMC Lectrosonics cardioid
electret with VariMic preamp

Along with these two models from Lectrosonics, a variety of different capsules
with a common thread and electrical interface are available from the major
microphone manufacturers.

A list of compatible capsules is on the website at www.lectrosonics.com listed
on the DHu product page.

LECTROSONICS, INC.2

Do not touch the contacts between the mic capsule
and transmitter body. When necessary, the contacts

can be cleaned with a cotton swab and alcohol.

Capsule Installation

Capsules are attached with a right-hand thread.

To remove the windscreen from the mic capsule,
line up the blue wrench (included with the capsule head) with the flat notches
on the lower threaded area of the mic capsule.

Align flats on

the wrench
with flats on
the capsule.

Battery Installation

To insert batteries, close the eject lever and
insert the upper contacts first (closest to the
mic capsule). Polarity is marked on the label
in the bottom of the battery compartment.

The contacts are very tight to prevent the
batteries from “rattling” as the transmitter is
being handled. Pull the eject lever outward

Close

eject lever

to install
batteries

Pull eject lever outward

to release batteries from

contacts

www.lectrosonics.com 3

to remove the batteries. The battery tips will
move outward, making them easier to grasp.

Control Panel

Six membrane switches on the control panel are used to set up the transmit­ter by navigating the menus on the LCD and selecting the desired values.

UP/DOWN Buttons for

Menu Item Selection

Power Button

Modulation

LEDs

IR Sync Port

Enter Menu and

Select Item

Previous

Screen

Programmable switch

setup button

Setup and Adjustments

Powering On

Press and hold the Power Button until a status bar on the LCD is completed.
The status bar will appear on the LCD, followed by a display of the model,
firmware version, frequency band and compatibility mode.

Hold
for
Rf On

When you release the button, the unit will be operational with the RF output
turned ON and the Main Window displayed.

5

A

623.400

DHu
V1.01

The Main Window

RF output ON

-40

-20

0

LECTROSONICS, INC.4

If you release the button before the status bar is complete, the unit will turn on

-40

-20

0

0

in the Standby mode with the RF output turned OFF and the antenna icon will
blink.

5

A

MUTE

623.400

The Main Window

RF output OFF

Powering Off

Press and hold the Power Button (or the side button if it is configured for
turning the power on and off) while the status bar on the LCD is completed.
The power will then be turned off. This can be done from any menu or screen.

Powering
O . . .

NOTE: If the Power Button is
released before the status bar has
completed, the unit will remain
turned on and the LCD will return
to the same screen or menu that
was displayed previously.

Standby Mode

A brief push of the keypad Power Button turns the unit on and places it into
a “standby” mode (not transmitting). Press the button and release before the
status bar completes. This allows the transmitter to be set up without the risk
of creating interference for other wireless systems that are operating in the
vicinity.

A notice will appear briefly confirming that the RF output of the transmitter is
turned off, followed by the Main Window. The antenna symbol will blink as a
reminder that the RF output is turned off.

5

A

Rf
Off

www.lectrosonics.com 5

623.400

-40

MUTE

-20

Symbol blinks

when RF output

is turned OFF