INSTRUCTION MANUAL DPR-A Plug-On Transmitter With Digital Hybrid Wireless® Technology Digital Hybrid Wireless® US Patent 7,225,135 Fill in for your records: Serial Number: Purchase Date: Rio Rancho, NM, USA www.lectrosonics.
DPR-A Table of Contents General Technical Description ........................................... 3 Digital Hybrid Wireless® Technology................................... 3 Outstanding Audio Performance......................................... 4 Low Frequency Roll-Off...................................................... 4 Input Limiter........................................................................ 4 Signal Encoding and Pilot Tone.......................................... 4 Control Panel..........
Digital Hybrid® Plug-On Transmitter Thank you for selecting a Lectrosonics DPR-A plug-On transmitter. The unique design provides several distinct features for professional applications: • Outstanding UHF operating range transmitter circuits from the beginning (3 Volts) to the end (1.7 Volts) of battery life, and an ultra low noise input amplifier for quiet operation.
DPR-A Outstanding Audio Performance The audio performance of the overall hybrid system is depicted in the graph below. Distortion in the system is extremely low over the entire audio bandwidth. Control Panel The control panel includes five membrane switches and an LCD screen to adjust the operational settings. Multicolor LEDs are used to indicate audio signal levels for accurate gain adjustment, battery status and encryption key function.
Digital Hybrid® Plug-On Transmitter Features Input Coupler Modulation LEDs PWR LED LCD KEY LED UP Arrow MENU/SEL Button The MENU/SEL button is used to display the transmitter menu items. Press once to open the menu, then use the UP and DOWN arrows to scroll menu items. Press MENU/SEL again to choose an option from the menu. BACK Button Once a selection is made in a menu, press the BACK Button to save your selection and go back to the previous menu.
DPR-A Battery Installation The battery compartment door is made of machined aluminum and is hinged to the housing to prevent it being damaged or lost. The transmitter is powered by two AA batteries. Note: Standard zinc-carbon batteries marked “heavy-duty” or “long-lasting” are not adequate. Attaching/Removing a Microphone The spring loaded coupler under the XLR jack maintains a secure fit to the microphone jack with continuous pressure applied by an internal spring.
Digital Hybrid® Plug-On Transmitter Operating Instructions Modulation LEDs UP Arrow PWR LED KEY LED MENU/SEL Button POWER Button DOWN Arrow BACK Button Turning Power ON Short Button Press When the unit is turned off, a short press of the power button will turn the unit on in the Standby Mode with the RF output turned off.
DPR-A Recorder Operating Instructions • Install battery(s) • Insert microSDHC memory card • Turn power on • Format memory card • Connect microphone and place it in the position where it will be used. • Have the user talk or sing at the same level that will be used in the production, and adjust the input gain so that the -20 LED blinks red on louder peaks. Input...
Digital Hybrid® Plug-On Transmitter IMPORTANT The formatting of the SD card sets up contiguous sectors for maximum efficiency in the recording process. The file format utilizes the BEXT (Broadcast Extension) wave format which has sufficient data space in the header for the file information and the time code imprint. The SD card, as formatted by the SMWB/SMDWB recorder, can be corrupted by any attempt to directly edit, change, format or view the files on a computer.
DPR-A DPR Menu Input Gain SEL BACK Use arrow keys to select input gain 22 Rolloff Use arrow keys to select 70 Hz Phase Use arrow keys to select audio output polarity Normal Invert Phantom 48V Xmit SDCard SEL BACK Freq 555.
Digital Hybrid® Plug-On Transmitter TCode TC Jam SEL BACK JAM NOW Plug in time code source and sync Use arrow keys to select MENU Press frame rate of 30, 29.97, 25, 24, 23.976, 30DF, or 29.97DF SEL function Fr.Rate 30 Use Clk Key LOADING TIMECODE FROM CLOCK KeyType SEL BACK Univrsal No Yes SendKey MENU SEL Share Setup AutoOn? SEL BACK No Yes Remote Enable Ignore BatType Alk. Lith.
DPR-A Setup Screen Details Input Menu Main Window Indicators Adjusting the Input Gain The Main Window displays the operating frequency, Standby or Operating mode, battery status, if an SDHC card is presnt/recording, and audio level. Frequency (MHz) Battery status Audio level Operating mode 470.
Digital Hybrid® Plug-On Transmitter Selecting the Low Frequency Roll-off It is possible that the low frequency roll-off point could affect the gain setting, so it’s generally good practice to make this adjustment before adjusting the input gain. The point at which the roll-off takes place can be set to: • 25 Hz • 100 Hz • 35 Hz • 120 Hz • 50 Hz • 150 Hz • 70 Hz The roll-off is often adjusted by ear while monitoring the audio. . Input...
DPR-A Xmit Menu Choosing Files for Replay Selecting Frequency The setup screen for frequency selection offers two ways to browse the available frequencies. Xmit... Freq. TxPower Rf On? Freq. 494.500 Freq. 494.500 Select recorded files on microSDHC memory card. Files 0004B 0003B 0002C 0001C 0002B 0001B Choosing Takes for Replay Use UP and DOWN arrows to toggle and MENU/SEL to play back. Press the MENU/SEL button to select each field. Use the and arrow buttons to adjust the frequency.
Digital Hybrid® Plug-On Transmitter microSDHC Memory Card Info Use Clock Information regarding the microSDHC memory card including space remaining on card. SDCard... For mat Naming SD Info [DPR ] E...................F 0/ 14G Max Rec 29:52:52 Fuel gauge Storage used Storage capacity Available recording time (H : M : S) TCode Menu TC Jam (jam timecode) TCode... TC Jam Fr. Rate Use Clk TCode... TC Jam Fr.
DPR-A Key Menu SendKey KeyType The DPR receives an encryption key via the IR port from a key generating receiver. Begin by selecting a key type in the receiver and generating a new key (key type is labeled KEY POLICY in the DSQD receiver). Set the matching KEY TYPE in the DPR and transfer the key from the receiver (SYNC KEY) to the DPR via the IR ports. A confirmation message will display on the receiver display if the transfer is successful.
Digital Hybrid® Plug-On Transmitter Setting Battery Timer Backlit Settings A built-in timer can be used with any battery type, but it is especially valuable with rechargeable batteries such as NiMH types. The voltage remains fairly constant across the discharge time of a rechargeable battery, then drops quickly near the end of the operating time.
DPR-A LectroRM Android By New Endian LLC LectroRM is a mobile application for iOS and Android operating systems. Its purpose is to remotely control Lectrosonics Transmitters, including: • SM Series • WM • L Series • DPR The app remotely changes settings on the transmitter through the use of encoded audio tones, which when received by the attached microphone, will alter the configured setting. The app was released by New Endian, LLC in September 2011.
Digital Hybrid® Plug-On Transmitter Accessories 21750 Barrel Adapter Mic adapter for Earthworks M30 microphone with HM, DPR and UH400a/TM transmitters. This polarity reversing adapter may be needed to correct for asymmetrical current draw in some P48 powered condenser microphones, including older Neumann 100 Series, Rode NTG3 and others. If your microphone does not power on correctly when used with these transmitters, insert the adapter between the transmitter and microphone.
DPR-A Specifications and Features Transmitter Recorder Operating Frequencies: 470.100 - 607.950 MHz Frequency Selection Steps: 25 kHz RF Power output: Selectable 25/50 mW Frequency stability: ± 0.002% Digital modulation: 8PSK Spurious radiation: Compliant with ETSI EN 300 422-1 v1.4.
Digital Hybrid® Plug-On Transmitter Firmware Update Firmware updates are made using a microSDHC memory card. Download and copy the following firmware update files to a drive on your computer. 7) If you re-insert the update card and turn the power back on for normal use, the LCD will display a message prompting you to format the card: dpr vX_xx.ldr is the firmware update file, where “X_xx” is the revision number.
DPR-A Recovery Process In the event of a battery failure while the unit is recording, a recovery process is available to restore the recording in proper format. When a new battery is installed and the unit is turned back on, the recorder will detect the missing data and prompt you to run the recovery process. The file must be recovered or the card will not be usable in the DPR.
Digital Hybrid® Plug-On Transmitter 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.
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.
