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Lectrosonics DBa Instruction Manual Download Page 5

Digital Hybrid Wireless Belt-Pack Transmitter

Rio Rancho, NM

5

DBa Block Diagram

Filters

Keypad

(2) AA 

Batteries

Oscillator

VCTXO

I2S

I2S

Voltage Controlled 

Oscillator

Final 

Amplifier

Control

PLL Ref

Phase Locked Loop

DSP Cloc

k

Switching 

Power 

Supply

Microprocessor

Power 

LED 

Tricolor 

D-A Convert-

er

A-D 

Converter

Shunt 

Limiter

Limiter Control

Gain 

Adj

HI/Lo 

Pass 
Filter

Input 

Preamp

Input 

Jack

Bias Voltage 

0, 2 or 4V

Servo Bias 

Supply

+5V

I + Q 

Baseband 

Signals

Low 

pass 

filters

IQ Modulator

UART

USB 
Jack

Security Key

Audio

Firmware 

Update

Key Received

Blue LED

Low

Pass
Filter

Buffer

36.864 mHz

DBu Transmitter

Summary of Contents for DBa

Page 1: ...DBa Digital Belt Pack Transmitter INSTRUCTION MANUAL Rio Rancho NM USA www lectrosonics com Fill in for your records Serial Number Purchase Date...

Page 2: ...btain protection from other radio services operating in the same TV bands a radio licence is required For further details consult Innovation Science and Economic Development Canada s document Client P...

Page 3: ...Forms Form601 601 html Table of Contents Introduction 4 Battery Installation 6 Belt Clips 7 Operating Instructions 7 Powering On in Operating Mode 8 Powering On in Standby Mode 8 Powering Off 8 Power...

Page 4: ...or lasting ruggedness The exterior is finished with an ultra hard black electroless nickel finish called ebENi Firmware updates are made through a side panel micro USB port Frequency Agility The trans...

Page 5: ...ocked Loop DSP Clock Switching Power Supply Microprocessor Power LED Tricolor D A Convert er A D Converter Shunt Limiter Limiter Control Gain Adj HI Lo Pass Filter Input Preamp Input Jack Bias Voltage...

Page 6: ...ery 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 batte...

Page 7: ...O 20 10 470 100 40 20 0 DBa USB Port Belt clip mounting hole Modulation Indicators Programmable Function Switch Audio Input Jack Antenna Port Belt clip mounting hole Battery status LED Full access to...

Page 8: ...and waiting for the countdown or with the program mable switch if it is configured for this function If the power button is released or the top panel switch is turned back on again before the countdow...

Page 9: ...value with arrow buttons SEL BACK Phase Normal Invert Phase SEL BACK BatType Alk Lith BatType SEL BACK BatTime SEL BACK Locked Yes No Locked Bat 5 41 Reset Yes No Select value with arrow buttons Sele...

Page 10: ...Refer to the section entitled Wiring Hookups for Different Sources for details on the correct wiring for line level sources and microphones to take full advantage of the Servo Bias circuitry Adjusting...

Page 11: ...s place can be set to 35 50 70 100 120 and 150 Hz Rolloff 70 Hz Gain Freq ProgSw Rolloff Selecting Audio Polarity Phase Audio polarity can be inverted at the transmitter so the audio can be mixed with...

Page 12: ...best to use the appropriate antenna for maximum operation Three antennas are included with the transmitter and are shipped from the factory pre cut and fully assembled Each antenna covers three blocks...

Page 13: ...USB to male 3 5 mm TRS 42 in length M152 5P 700 Lavaliere microphone omnidirectional MI33PRA Instrument cable passive type for use with very high output pickups right angle 1 4 plug MI33PST Instrumen...

Page 14: ...2 4 V PIN 5 Line level input for tape decks mixer outputs musical instruments etc Installing the Connector 1 If necessary remove the old connector from the microphone cable 2 Slide the dust boot onto...

Page 15: ...re Microphone Cable Termination for Non Lectrosonics Microphones TA5F Connector Assembly Mic Cord Stripping Instructions 1 2 3 4 5 VIEW FROM SOLDER SIDE OF PINS 0 3 0 15 Crimping to Shield and Insulat...

Page 16: ...o 4k ohms Fig 4 Fig 11 4 VOLT POSITIVE BIAS 3 WIRE ELECTRET NOTE This servo bias wiring is not compatible with earlier versions of Lectrosonics transmitters Check with the factory to confirm which mod...

Page 17: ...ing problems capacitors can be installed on the mic pins inside the TA5F connec tor housing Refer to the diagram below for the correct locations of capacitors Use 330 pF capacitors Capacitors are avai...

Page 18: ...DB Firmware Step 1 Begin by downloading the USB Firmware Updater Program Step 2 Next test the Updater by opening the icon If the driver opens automatically proceed to Step 3 WARNING If you receive the...

Page 19: ...ect the transmitter to your PC Step 7 In Lectrosonics USB Firmware Updater choose the detected device browse to local Firmware File and click Start NOTE It may take up to a minute or so for the Update...

Page 20: ...Receiver output is disconnected cable is defective or miswired 3 Sound system or recorder input is turned down Distorted Sound 1 Transmitter gain audio level is too high Check Modulation LEDs on trans...

Page 21: ...l off is selectable at 35 50 70 100 120 180 Hz Line Instrument 35 Hz to 20 kHz 1dB THD 0 2 typical SNR at receiver output Note The dual envelope soft limiter provides exceptionally good handling of tr...

Page 22: ...pair For timely service please follow the steps below A DO NOT return equipment to the factory for repair without first contacting us by email or by phone We need to know the nature of the problem the...

Page 23: ...Digital Hybrid Wireless Belt Pack Transmitter Rio Rancho NM 23...

Page 24: ...osonics Inc will pay for the cost of returning your equipment to you This warranty applies only to items returned to Lectrosonics Inc or an authorized dealer shipping costs prepaid within one year fro...

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