Lectrosonics Dbu-lemo, DBU-LEMO-E01 User Manual
DBu-LEMO
Digital Belt Pack Transmitter
DBu-LEMO
DBu-LEMO/E01
INSTRUCTION MANUAL
Fill in for your records:
Serial Number:
Purchase Date:
LEMO® is a registered trademark of Interlemo Holding S.A.
Corporation Switzerland
Rio Rancho, NM, USA
www.lectrosonics.com
DBu-LEMO, DBu-LEMO/E01
Table of Contents
Introduction ........................................................................... 2
Frequency Agility................................................................. 2
Encryption ........................................................................... 2
DSP-controlled Input Limiter ............................................... 2
DBu-LEMO Block Diagram ................................................. 3
Battery Installation ............................................................... 4
Battery Status LED Indicator .............................................. 4
Belt Clips ............................................................................. 5
IR (infrared) Port ................................................................. 5
Audio Input .......................................................................... 5
Features and Functions ....................................................... 5
Operating Instructions ......................................................... 6
Powering On in Operating Mode ......................................... 6
Powering On in Standby Mode ........................................... 6
Powering Off ....................................................................... 6
Power Menu Options ............................................................ 6
Entering the Power Menu .................................................... 6
LCD Menu Map ...................................................................... 7
Main Menu and Setup Screen Details ................................. 8
Entering the Main Menu ...................................................... 8
Main Window Indicators ..................................................... 8
Connecting the Signal Source ............................................ 8
Adjusting the Input Gain ...................................................... 8
Selecting Frequency ........................................................... 9
Selecting Programmable Switch Functions......................... 9
Selecting the Low Frequency Roll-off ................................. 9
Selecting Audio Polarity (Phase) ......................................... 9
Selecting Battery Type ........................................................ 9
Setting Transmitter Output Power ....................................... 9
Remote Function ................................................................. 9
Locking/Unlocking Changes to Settings.............................. 10
Restoring Default Settings .................................................. 10
KeyType .............................................................................. 10
WipeKey .............................................................................. 10
SendKey .............................................................................. 10
LectroRM ............................................................................... 11
Whip Antennas .................................................................... 12
Encryption Key and Settings Transfer ............................... 12
Microphone Wiring ............................................................... 13
Line Input Wiring and Use ................................................... 13
Accessories .......................................................................... 13
Wireless Designer Software ............................................... 14
Firmware Update Instructions ............................................. 14
Specifications ....................................................................... 15
Troubleshooting .................................................................... 16
Service and Repair ............................................................... 17
Returning Units for Repair .................................................. 17
Introduction
The DBu-LEMO transmitter employs 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 (E01: 470.100 - 614.375 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,
to maximize the dynamic range and signal to noise
ratio.
Frequency Agility
The transmitter tunes across the entire frequency
range, from 470.100 MHz to 607.950 MHz (E01:
470.100 - 614.375).
Encryption
When transmitting audio, there are situations where privacy is essential, such as during professional sporting
events, in court rooms or private meetings. For instances where your audio transmission needs to be kept
secure, without sacrificing audio quality, Lectrosonics
introduces Encryption Keys. Truly entropic encryption
keys are first created by a Lectrosonics receiver, such
as the DSQD Receiver. The key is then synced with the
DBu-LEMO via the IR port. The audio will be encrypted
and can only be listened to if both DBu-LEMO and receiver have the matching encryption key. If you are trying to transmit an audio signal and keys do not match,
all that will be heard is silence or white noise.
DSP-controlled Input Limiter
The transmitter employs a digitally-controlled analog
audio limiter prior to the analog-to-digital converter.
The limiter has a range greater than 30 dB for excellent
overload protection. A dual release envelope makes the
limiter acoustically transparent while maintaining low
distortion. It can be thought of as two limiters in series,
connected as a fast attack and release limiter followed
by a slow attack and release limiter. The limiter recovers
quickly from brief transients, so that its action is hidden
from the listener, but recovers slowly from sustained
high levels to keep audio distortion low and preserve
short term dynamic changes in the audio.
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LECTROSONICS, INC.
DBu-LEMO Block Diagram
DBu/LEMO Transmitter
Digital Belt-Pack Transmitter
Input
Jack
+5V
Shunt
Limiter
Servo Bias
Supply
Input
Preamp
Gain
Adj
DSP Clock
Oscillator
VCTXO
36.864 mHz
Bias Voltage
0, 2 or 4V
HI/Lo
Pass
Filter
Limiter Control
Key Received
Blue LED
PLL Ref
Converter
Audio
I2S
Phase Locked Loop
A-D
Microprocessor
Keypad
D-A Convert-
er
I2S
Voltage Controlled
Control
Firmware
Update
Security Key
Oscillator
I + Q
Baseband
Signals
(2) AA
Batteries
UART
Switching
Supply
Power
LED
Tr icolor
IR Port
Low
pass
filters
Power
USB
Jack
Low
Pass
Filter
IQ Modulator
Buffer
Final
Amplifier
Filters
Consumer Alert for US Users - FCC Order DA 10-92
Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system
without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power
level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers
should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to
change. For more information, call the FCC at 1-888- CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC’s wireless microphone
website at www.fcc.gov/cgb/wirelessmicrophones. To operate wireless microphone systems at power greater than 50mW, you
must qualify as a Part 74 user and be licensed. If you qualify and wish to apply for a license go to: http://www.fcc.gov/Forms/
Form601/601.html
Rio Rancho, NM
3
DBu-LEMO, DBu-LEMO/E01
Battery Installation
The transmitter is powered by two AA batteries. We
recommend using two AA Duracell Ultra batteries.
The battery status circuitry compensates for the difference in voltage drop between alkaline and lithium batteries across their usable life, so it’s important to select
the correct battery type in the menu.
Because rechargeable batteries run down quite abruptly, using the Power LED to verify battery status will not
be reliable. However, it is possible to track battery status
using the battery timer function available in the receiver.
Push outward on the battery compartment door and lift
it to open.
Slide door out to release catch
Lift door to open
Insert the batteries according to the markings on the
back of the housing.
If the batteries are inserted incorrectly, the door will
close but the unit will not operate.
The battery contacts can be cleaned with alcohol and
a cotton swab, or a clean pencil eraser. Be sure not
to leave any remnants of the cotton swab or eraser
crumbs inside the compartment.
Contact springs
Battery Status LED Indicator
Alkaline, lithium or rechargeable batteries can be used
to power the transmitter. The type of batteries in use are
selectable in a menu on the LCD.
When alkaline or lithium batteries are being used, the
LED labeled BATT on the keypad glows green when the
batteries are good. The color changes to red when the
they are nearing the end of life. When the LED begins to
blink red, there will be only a few minutes remaining.
The Power/Function LED on the top panel will mirror
the keypad LED unless the programmable switch is set
to Mute, and the switch is turned on.
The exact point at which the LEDs turn red will vary
with battery brand and condition, temperature and
power consumption. The LEDs are intended to simply
catch your attention, not to be an exact indicator of
remaining time.
A weak battery will sometimes cause the Power LED to
glow green immediately after the transmitter is turned
on, but it will soon discharge to the point where it will
turn red or the unit will turn off completely.
Rechargeable batteries give little or no warning when
they are depleted. If you wish to use these batteries
in the transmitter, the most accurate way to determine
runtime status is by testing the time provided by a particular battery brand and type, then using the BatTime
function to determine remaining runtime.
NOTE: Refer to the Main Menu and Setup Section
for BatTime details.
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LECTROSONICS, INC.
Features and Functions
Digital Belt-Pack Transmitter
Modulation
Indicators*
Antenna
Port
-20
IR Port
-10
AUDIO
IR PORT
status LED
Belt clip
mounting hole
Battery
compartment
door
Return to
previous screen
PWR/FUNC
Battery
Programmable
Function Switch
Input Jack
LEMO
Audio
DBu
470.100
-40
-20
u
Full access to all settings is provided through the keypad and LCD. The transmitter 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.
Key verification
LED
Belt clip
mounting hole
USB Port
+0
Menu navigation
buttons
Power button
*When the transmitter is set to MUTE, the -10 Modulation Indicators LED will glow solid red.
Remove hole cap to
attach spring loaded
belt clip
Belt Clips
The wire belt clip may be removed by pulling the ends
out of the holes in the sides of the case. Be sure to
have a firm grip to avoid scratching the surface of the
housing.
An optional spring-loaded, hinged belt clip (model number BCSLEBN) is also available. This clip is attached by
removing the plastic hole cap on the back of the housing and mounting the clip with the supplied screw.
IR (infrared) Port
The IR port is available on the top of the transmitter for
quick setup using a receiver with this function available.
IR Sync will transfer the settings for frequency from the
receiver to the transmitter.
Audio Input
The input jack is a rugged 3-pin LEMO connector with a
threaded locking sleeve.
Rio Rancho, NM
5
DBu-LEMO, DBu-LEMO/E01
Operating Instructions
Powering On in Operating Mode
Press and hold the Power Button for several seconds
until a moving bar on the LCD progresses.
Hold
DBu
for
Rf On
V1.13
/1.05
When you release the button, the unit will be operational with the RF output turned on and the Main Window
displayed.
Powering On in Standby Mode
A brief press of the Power Button , and releasing it
before the moving bar progresses, will turn the unit on
with the RF output turned off. In this Standby Mode the
menus can be browsed to make settings and adjustments without the risk of interfering with other wireless
systems nearby.
Hold
for
Rf On
Release Power
Button before
the moving bar
progresses to
enter standby
mode
DBu
470.100
-40
-20
RF indicator blinks
DBu
470.100
-40
-20
+0
Power Menu Options
Entering the Power Menu
With the unit turned on, press the power button once
briefly from any menu or screen and a menu will appear
with several options. Use the and arrow buttons
to highlight menu items. Then press MENU/SEL to
execute the item or enter a setup screen. The following
options are available:
• Resume - returns to the previous mode and screen
+0
• 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 turn
back on after a power failure or when fresh batteries are installed (works in the operating mode only)
• Backlit - adjusts the duration of the LCD back light
to 5 seconds or 30 seconds, or to remain on
• About - displays model number and firmware
version
After settings and adjustments are made, press the
power button again to turn the unit off.
Powering Off
Powering
O . . .
If the power button is released, or the top panel switch
is turned back on again before the moving bar progresses, the unit will remain turned on and the LCD will
return to the same screen or menu that was displayed
previously.
NOTE: If the programmable switch is in the OFF
position, power can still be turned on with the
power button. If the programmable switch is then
turned on, a brief message will appear on the LCD.
From any screen, power can be
turned off by selecting Pwr Off in the
power menu, holding the Power
Button in and waiting for the
moving bar to progress, or with the
programmable switch (if it is configured for this function).
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LECTROSONICS, INC.
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