Lectrosonics DHu Manual de usuario

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

DHu

Digital Handheld Transmitter

Quick

Start

Guide

8 May 2019

U.S. Patent 7,225,135

LECTROSONICS, INC.2

Mechanical Assembly

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.

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

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.

www.lectrosonics.com 3

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

eject lever

to install

batteries

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

to remove the batteries. The battery tips will

move outward, making them easier to grasp.

Pull eject lever outward

to release batteries from

contacts

LECTROSONICS, INC.4

Control Panel

Six membrane switches on the control panel are used to set up the transmit-

ter by navigating the menus on the LCD and selecting the desired values.

Power Button

Modulation

LEDs

Screen

UP/DOWN Buttons for

Menu Item Selection

Enter Menu and

Select Item

IR Sync Port

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.

DHu

V1.01

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.

623.400

-40 -20 0

AThe Main Window

RF output ON

www.lectrosonics.com 5

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

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

blink.

623.400

-40 -20 0

AMUTE 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.

623.400

-40 -20

AMUTE Symbol blinks

when RF output

is turned OFF

Off

LECTROSONICS, INC.6

Power Menu

Resume

Pwr Off

Rf On?

Backlit

When the transmitter is turned on, a brief push of the

Power Button on the keypad will reveal a menu allowing

you to choose between Resume, Pwr Off, Rf On?,

Backlit and About.

Use the UP/DOWN buttons to select one of the menu

items, then press the MENU/SEL button to conﬁrm this

action.

• Resume: Continue operating in the same condition as before.

• Pwr Off: Turns off the transmitter.

• Rf On?: Begin transmitting the RF signal, enters another screen prompt-

ing a Yes or No answer.

• Backlit: The LCD includes a backlight that illuminates the display for

easier viewing. It is set to come on when any button on the control panel

is pressed, then stay on for 5 seconds, 30 seconds or to stay on all the

time.

• About: Displays the model, ﬁrmware version, frequency block and com-

patibility mode.

The unit can also be turned off from any menu or screen on the LCD by hold-

ing the power button in while the status bar on the LCD is completed.

Battery Condition

An icon on the Main Window indicates the approximate remaining power of

the batteries. This battery gauge is most accurate with the typical voltage drop

across the life of alkaline batteries.

Battery Gauge

623.400

-40 -20 0

Rechargeable batteries give little or no warning when nearing depletion. If

you use rechargeable batteries in the transmitter, we recommend trying fully

charged batteries ﬁrst, noting the length of time that the batteries will run the

unit, and in the future using somewhat less than that time to determine when

the battery needs to be replaced. The Venue and other receivers from Lectro-

sonics offer a timer function to assist in this process.

www.lectrosonics.com 7

Navigating Menus and Screens

The Main Window displays the following information:

DHu

545.400

-40 -20 0

MUTE Icon indicates

whether RF output

is turned on or off

Battery condition

Operating

frequency in MHz

Audio level

Function of the

programmable

switch

1) Press the MENU/SEL button to enter the setup menu. Use the UP/DOWN

buttons to highlight the menu item.

2) Press the MENU/SEL button to enter the setup screen for that item. Use

the UP/DOWN buttons to select the desired value or mode.

Gain

Freq.

ProgSw

Rolloff

-40 -20 0

Gain

3) Press the MENU/SEL button to save this setting and return to the previ-

ous screen.

4) Press the BACK button to return to the Main Window.

LECTROSONICS, INC.8

Menu Map

SEL

BACK

Freq.

Select option with arrow buttons

Use arrow buttons

to select value

Gain SEL

BACK

Gain

Level meter at bottom of screen

Freq.

470.675

SEL

BACK

ProgSw

Power

SEL

BACK

Rolloff

50 Hz Select value with arrow buttons

SEL

BACK

Phase Normal

Invert

Phase

SEL

BACK

BatType Alk.

Lith.

BatType

Select value with arrow buttons

Select option with arrow buttons

SEL

BACK

Default

Settings

Yes

Select option with arrow buttons

SEL

BACK

KeyType

Standard Select option with arrow buttons

SEL

BACK

TxPower

25 mW

50 mW

Select option with arrow buttons

TxPower

SEL

BACK

WipeKey

Yes

WipeKey?

Select option with arrow buttons

SEL

BACK

SendKey

Press to send key

SEL

Press to highlight MHz or kHz

-40 -20 0

No Grp

www.lectrosonics.com 9

Gain

This setting is very important since it can have a signiﬁcant effect on the

signal to noise ratio the system will deliver. The gain adjustment can even af-

fect the operating range of the wireless system. Gain must be set according to

the individual voice, the mic capsule in use and the handling technique of the

user. LEDs in the control panel facilitate accurate gain adjustment.

Gain

Freq.

ProgSw

Rolloff

-40 -20 0

Gain

IMPORTANT: See the section Input Gain Adjustment on page 9 for

details.

Freq.

The operating frequency is normally determined using the scanning function

in the receiver or with coordination software. The frequency is shown on the

transmitter LCD display in MHz and with a hexadecimal code that is used on

most Lectrosonics receivers.

Frequency groups are also able to be received via IR (Inrared) port sync.

The group options are set by the receiver, and will show at the bottom of the

screen as No Grp, Grp x, Grp w, Grp v, or Grp u.

Use the MENU/SEL button to toggle between options and UP and DOWN

arrows to adjust.

Freq

Grp x

628.200

Gain

Freq.

ProgSw

Rolloff

Frequency

Group

Frequency

ProgSw

The Programmable Switch on the housing can be set to provide several func-

tions, or it can be bypassed.

NOTE: See section on Programmable Switch Functions.

Functions:

(none)

Mute

Power

TalkBk

Cough

PTT

Gain

Freq.

ProgSw

Rolloff

LECTROSONICS, INC.10

Rolloff

A low frequency roll-off ﬁlter can be set for a -3dB point at 25, 35, 50, 70, 100,

120 or 150 Hz. Roll-off slopes are 12.2 dB/octave at 35 Hz and 10.1 dB/oc-

tave at 70 Hz through 125 Hz.

Gain

Freq.

ProgSw

Rolloff

70 Hz

The roll-off frequency is normally adjusted by ear to suit personal preferences.

Phase

The phase (polarity) of the audio can be inverted to match other microphone

capsules as needed.

TxPower

Phase

Rf On?

Default

Phase

Pos

Neg

BatType

Selects the type of batteries being used; alkaline or lithium.

Phase

BatType

TxPower

Default

BatType

Alk.

Lith.

TxPower

Output power can be set to 100 mW to extend operating range (which can

also suppress noise and dropouts to some extent) or set to 50 mW to slightly

extend the operating life of the batteries.

BatType

TxPower

Default

KeyType

TxPower

50 mW

100 mW

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