Lectrosonics DHu Datasheet

DHu

Handheld Transmitter

TECHNICAL DATA

• Fourth generation digital design

• 256-bit encryption - AES 256-CTR

• Interchangeable thread-on capsules

• Membrane switch and LCD interface

• Battery powered by two AA

• Selectable RF output power at 25 or 50 mW

• IR

(Infrared) Port for fast setup

• Adjustable low frequency audio roll-off

• Rugged machined aluminum housing

The DHu Digital Hybrid Wireless handheld transmitter
represents a versatile solution for a variety of wireless
microphone applications including live performance,
broadcast, AV rental and houses of worship. The design
incorporates advanced features to provide high-quality
speech and vocal reinforcement.

The transmitter benefits from a fourth generation design
with specially developed, high efficiency digital circuitry
for extended operating time on two AA batteries. The
transmitter can tune across the UHF television band
from 470.100 to 607.950 MHz, with a selectable output
power of 25 or 50 mW. The pure digital architecture
enables AES 256-CTR encryption for applications that
require high level security.

Studio quality audio performance is assured by high
quality components, wide range audio gain adjustment
in fine increments, and a DSP-controlled, dual envelope
limiter. Low frequency audio roll-off is adjustable to tailor
the sound as needed for a variety of applications.

Setup is easy using membrane switches on a concealed
control panel. An IR (infrared) port on the control panel
allows settings to be transferred between receiver and
transmitter.

A programmable switch on the outside of the housing
can be configured as a cough or mute switch, a power
switch, or be bypassed.

Interchangeable Capsules

Lectrosonics offers the HHC cardioid condenser capsule.
Thread-on capsules from other manufacturers using a

1.25” opening and 28 thread pitch can also be used,
including those from manufacturers such as EV, Shure®,
Heil SoundTM, Earthworks®, Telefunken® and others.*

* Shure, Earthworks and Telefunken are registered trademarks of their respective
companies and have no association with Lectrosonics. Heil Sound is a trademark
of Heil Sound Ltd.

Rio Rancho, NM, USA
www.lectrosonics.com

Concealed Control Panel

The lower housing sleeve slides down for access to the
control panel. Coarse threads on the sleeve hold the
sleeve firmly in place during use, but allow easy access
to the control panel for setup and adjustment.

Selectable RF Transmission Power

The DHu transmitter allows the user to select from
among two power settings depending on the needs of
the situation. The lower RF power setting uses slightly
less current to extend battery life. The higher power set­ting provides greater range and resistance to dropouts.

Programmable Button Functions

The function of the button on the back of transmitter
below the capsule can be configured as follows:

• (none) bypasses the switch.

• Mute operates as a toggle. One press and release
mutes the audio, and the next restores the audio.

• Cough is a momentary audio mute when the
button is held in. Audio is restored as soon as the
button is released.

• Power operates in the same manner as the power
button membrane switch on the control panel.
Press and hold for a countdown, or a brief press to
access a menu.

Battery Compartment

The battery contacts hold the batteries firmly to prevent
audible “rattle” when the transmitter is shaken. An eject
lever releases one end of the batteries to make it easier
to remove them.

Lectrosonics HHC
Electret Capsule
Cardioid Pattern

Specifications

Frequency range: 470.100 - 607.950 MHz
Frequency selection steps: Selectable; 100 kHz or 25 kHz

RF Power output: Selectable; 25 or 50 mW
Frequency stability: ± 0.002%
Digital Modulation: 8 psk
Spurious radiation: Compliant ETSI EN 300 422-1 v1.4.2
Operating temperature range: -20° C to +50° C
Input compressor: Dual envelope compressor, >30 dB range
Gain control range: 45 dB; semi-log menu-driven control; 1 dB steps
Modulation indicators: Dual bicolor LEDs indicate modulation

of -20, -10, 0 and +10 dB referenced to full
modulation, LCD bar-graph indicator

Frequency response 40 Hz to 20 kHz (+/- 1dB)
Low frequency roll-off: -3 dB @35, 50 and 70 Hz; selectable; 36 dB/octave

Controls:

External: Programmable mute/talkback button
Battery compartment: Power, mute disable, menu/select, up/down, and

back arrow buttons for menu selection and settings

Battery: 2x AA with polarity protection and battery ejector
Battery life: At 50 mW: 5 hours (Duracell Quantum); battery

status is transmitted to Lectrosonics receivers
Capsule Interface:

Power available: 5V, 25 mA max
Input impedance: 1000 Ohms

Weight: 12.1 oz. with batteries and HHC capsule
Dimensions: 9.5” long x 1.97” diameter at largest point

1.25” opening and 28 thread pitch

Emission Designator: 200KG1E

Specifications subject to change without notice.

581 Laser Road NE • Rio Rancho, NM 87124 USA • www.lectrosonics.com
[phone] • fax [phone] • [phone] US and Canada • [e-mail]

4 June 2019