INSTRUCTION MANUAL DBa Digital Belt Pack Transmitter Fill in for your records: Serial Number: Purchase Date: Rio Rancho, NM, USA www.lectrosonics.
DBa 2 LECTROSONICS, INC.
Digital Hybrid Wireless Belt-Pack Transmitter Table of Contents Introduction............................................................................ 4 Battery Installation ................................................................ 6 Belt Clips ................................................................................ 7 Operating Instructions .......................................................... 7 Powering On in Operating Mode ..........................................
DBa Introduction DSW (Digital Secure Wireless) is designed for no-compromise applications where performance and security are the highest priority. A completely new digital architecture was developed for the DSW wireless system, which includes the DBa Transmitter. Extended operating range rivals the best analog and Digital Hybrid Wireless® systems, with remarkable audio quality and only 2.5 ms of latency. The system operates on standard UHF FCC Part 74 frequencies (TV channel band).
Digital Hybrid Wireless Belt-Pack Transmitter DBa Block Diagram DBa Transmitter +5V Servo Bias Supply Bias Voltage 0, 2 or 4V Input Preamp HI/Lo Pass Filter Audio Gain Adj Shunt Limiter D-A Converter A-D Converter Input Jack I2S I2S I+Q Baseband Signals (2) AA Batteries Switching Power Supply Limiter Control DSP Clock Low pass filters Power LED Tricolor Microprocessor Key Received Blue LED Firmware Update UART USB Jack Security Key Keypad IQ Modulator Oscillator VCTXO PLL Ref Volta
DBa Battery Installation The transmitter is powered by two AA batteries. We recommend using alkaline, lithium, or rechargeable batteries for longest life. Standard zinc-carbon batteries marked “heavy-duty” or “long-lasting” are not adequate. 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.
Digital Hybrid Wireless Belt-Pack Transmitter Operating Instructions Modulation Indicators Antenna Port Power/Function LED -10 PWR/FUNC AUDIO Programmable Function Switch 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.
DBa Powering On in Operating Mode Press and hold the Power Button for several seconds until a counter on the LCD progresses from 1 through 3. Hold for Rf On ...3 470.100 V0.03 -40 -20 +0 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 , releasing it before the counter has reached 3, will turn the unit on with the RF output turned off.
Digital Hybrid Wireless Belt-Pack Transmitter LCD Menu Map Gain SEL Gain 22 BACK Freq. ProgSw Rolloff SEL BACK SEL BACK SEL BACK Phase SEL BACK BatType SEL BACK BatTime SEL BACK Locked? SEL BACK Backlit SEL BACK About SEL BACK Default SEL BACK WipeKey SEL BACK Rio Rancho, NM Use arrow buttons to select value Level meter at bottom of screen Freq. 470.
DBa Main Menu and Setup Screen Details Connecting the Signal Source Entering the Main Menu The LCD and keypad interface makes it easy to browse the menus and make the selections for the setup you need. When the unit is powered up in either the operating or the standby mode, press MENU/SEL on the keypad to enter a menu structure on the LCD. Use the and arrow buttons to select the menu item. Then press the MENU/SEL button to enter the setup screen. Gain Freq.
Digital Hybrid Wireless Belt-Pack Transmitter 6) If the audio output level of the receiver is too high or low, use only the controls on the receiver to make adjustments. Always leave the transmitter gain adjustment set according to these instructions, and do not change it to adjust the audio output level of the receiver. Selecting Frequency The setup screen for frequency selection offers two ways to browse the available frequencies. Gain Freq. ProgSw Rolloff Freq. Freq. 494.500 494.
DBa Locking/Unlocking Changes to Settings Changes to the settings can be locked to prevent inadvertent changes being made. Phase BatType BatTime Locked? Locked? Gain 25 Yes No -40 -20 Restoring Default Settings This is used to restore the factory settings. Backlit About Default Wipekey Default settings No Yes 0 A small padlock symbol will appear on adjustment screens when changes have been locked. Wipekey The encryption key can be erased with this setup screen.
Digital Hybrid Wireless Belt-Pack Transmitter Accessories P/N 26895 Wire belt clip BCSLEBN Spring-loaded belt clip M152/5P 700 Lavaliere microphone; omnidirectional MI33PRA Instrument cable; passive type for use with very high output pickups; right angle 1/4” plug MI33PST Instrument cable; passive type for use with very high output pickups; straight 1/4” plug MC35 Line level adapter cable; XLR-F to TA5F; 37” length MC41 Dynamic mic level adapter cable; XLR-F to TA5F; 37” length P/N 55008 AA
DBa 5-Pin Input Jack Wiring The wiring diagrams included in this section represent the basic wiring necessary for the most common types of microphones and other audio inputs. Some microphones may require extra jumpers or a slight variation on the diagrams shown. Audio input jack wiring: PIN 1 Shield (ground) for positive biased electret lavaliere microphones. Shield (ground) for dynamic microphones and line level inputs.
Digital Hybrid Wireless Belt-Pack Transmitter Microphone Cable Termination for Non-Lectrosonics Microphones TA5F Connector Assembly Mic Cord Stripping Instructions 1 4 5 2 3 VIEW FROM SOLDER SIDE OF PINS 0.15" 0.3" Crimping to Shield and Insulation Strip and position the cable so that the clamp can be crimped to contact both the mic cable shield and the insulation. The shield contact reduces noise with some microphones and the insulation clamp increases ruggedness.
DBa Input Jack Wiring for Different Sources In addition to the microphone and line level wiring illustrated below, Lectrosonics makes a number of cables and adapters for other situations such as connecting musical instruments (guitars, bass guitars, etc.) to the transmitter. Visit www.lectrosonics.com and click on Accessories, or download the master catalog. A lot of information regarding microphone wiring is also available in the FAQ section of the web site at: www.lectrosonics.
Digital Hybrid Wireless Belt-Pack Transmitter Microphone RF Bypassing Line Level Signals When used on a wireless transmitter, the microphone element is in the proximity of the RF coming from the transmitter. The nature of electret microphones makes them sensitive to RF, which can cause problems with microphone/transmitter compatibility.
DBa Troubleshooting It is important that you follow these steps in the sequence listed. Symptom: Possible Cause: Transmitter Battery LED off when Power Switch “ON” 1. Batteries are inserted incorrectly. 2. Batteries are low or dead. No Transmitter Modulation LEDs when Signal Should be Present 1. 2. 3. 4. 5. 6. Receiver Indicates RF But No Audio 1. Audio source or cable connected to transmitter is defective. Try using an alternate source or cable. 2.
Digital Hybrid Wireless Belt-Pack Transmitter Specifications and Features Operating Frequencies: Frequency Selection Steps: RF Power output: Frequency Stability: Digital Modulation: Spurious radiation: Equivalent input noise: Input level: Input impedance: Input limiter: Gain control range: Modulation indicators: Controls: Audio Input Jack: Antenna: Battery: Battery Life: Weight: Dimensions: Emission Designator: 470.000 - 691.175 25 kHz 50 mW ± 0.
DBa Service and Repair If your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment needs repair. Make sure you have followed the setup procedure and operating instructions. Check the interconnecting cables and then go through the Troubleshooting section in this manual. We strongly recommend that you do not try to repair the equipment yourself and do not have the local repair shop attempt anything other than the simplest repair.
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DBa 22 LECTROSONICS, INC.
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LIMITED ONE YEAR WARRANTY The equipment is warranted for one year from date of purchase against defects in materials or workmanship provided it was purchased from an authorized dealer. This warranty does not cover equipment which has been abused or damaged by careless handling or shipping. This warranty does not apply to used or demonstrator equipment. Should any defect develop, Lectrosonics, Inc. will, at our option, repair or replace any defective parts without charge for either parts or labor.
