Lectrosonics DBu Datasheet

DBu

Digital Belt Pack Transmitter

TECHNICAL DATA

• Tunes across entire UHF frequency range

• 256-bit encryption - AES 256-CTR

• Selectable RF power at 25 and 50 mW

• USB port for firmware updates

• Wide range input gain adjustment

• DSP-controlled input limiter

• Two AA battery power

• Solid machined aluminum housing

The top panel contains the antenna jack, audio input
level LEDs, the programmable function switch and the
audio input jack. The LEDs provide red/green indications
of the audio level from -20 dB to the onset of limiting to
enable accurate input gain adjustment. The programma­ble switch can be configured as a mute switch, a power
on/off switch, or be bypassed.

The DBu transmitter is a second generation design with
specially developed, high efficiency digital circuitry for
extended operating time on two AA batteries. The trans­mitter can tune in coarse or fine steps 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 high
level security applications.

Studio quality audio performance is assured by high
quality components in the preamp, wide range input gain
adjustment and DSP-controlled limiting. Input connec­tions and settings are included for any lavaliere micro­phone, dynamic microphones and line level inputs. Input
gain is adjustable over a 44 dB range in 1 dB steps to
allow an exact match to the input signal level, maximiz­ing the dynamic range and signal to noise ratio.

The housing is constructed of solid machined aluminum
for lasting ruggedness. The exterior is finished with an
ultra hard, black electroless nickel finish.

Rio Rancho, NM, USA
www.lectrosonics.com

m

The transmitter is supplied with a stainless, spring wire
belt clip that is secure, but easily detached and re-at­tached without tools. A spring-loaded belt clip is available
as an option. The battery door is machined aluminum,
hinged to the housing to prevent it being lost. The battery
door latches securely to prevent being opened inadver­tently, and will not pop open even if the unit is dropped.

Firmware updates are made via the USB port on the
side panel of the housing. The procedure is very simple
using a menu item on the transmitter and a standard
micro USB cable.

Specifications

Operating Frequencies: 470.100 - 607.950 MHz
Frequency Selection Steps: 25 kHz
RF Power output: Selectable; 25 or 50 mW
Frequency Stability: ± 0.002%
Digital Modulation: 8PSK
Equivalent input noise: –128 dBV
Input level: Nominal 2 mV to 300 mV, before limiting

Greater than 1V maximum, with limiting.
Input impedance: • Mic: 300 Ohm

• Line: 2k Ohm
Input limiter: Dual envelope type; 30 dB range
Gain control range: 44 dB in 1 dB steps; digital control
Modulation indicators: • Dual bicolor LEDs indicate modulation of

-20, -10, 0 and +10 dB referenced to full
modulation

• LCD bar graph
Controls: • Top panel toggle switch; programmable as

power, mute or none (off) function

• Side panel membrane switches with LCD
interface for power on/off and all setup and
configuration controls

Audio Input Jack: Switchcraft 5-pin locking (TA5F)
Antenna: Galvanized steel, flexible wire
Battery: Two AA Duracell Quantum recommended
Battery Life: 5 hours; Duracell Quantum alkaline
Weight: 6.24 ounces (177 grams), including two AA

batteries and wire belt clip
Dimensions: 3.2 x 2.5 x .74 in. (86 x 62 x 19 mm)
Emission Designator: 200KG1E

USB port

Setup and adjustment is enabled through a backlit LCD,
membrane switches and an intuitive menu structure.
Input gain is adjustable over a wide range in 1 dB steps
to optimize modulation and limiting for maximum signal
to noise ratio and mimimum distortion.

DBu

470.100

-40

-20

+0

Specifications subject to change without notice.

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

31 May 2019