DPR-A Digital Plug-On Transmitter

Model:

DPR-A

Price:	$1,843.00

Features

Wideband UHF tuning range
Selectable 25/50 mW output power
On-board recording (Please note that transmit and record mode cannot be engaged simultaneously)
Accepts microphone or line level signals
Selectable 5, 15, 48 volt phantom power
Adjustable low frequency roll-off
Powered by two AA batteries
IR (infrared) port for fast setup
Remote controlled “dweedle” tones (audio tone set-up control)
Time code jam sync
Solid machined aluminum housing
Encryption 256 Bit AES, CTR Mode

Description

Overview

The Lectrosonics DPR-A is a wideband digital plug-on transmitter with time code recorder capability and an external antenna. It matches any microphone or line level source via a standard XLR connector. The DPR 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 purely digital architecture utilizes AES 256-CTR encryption for high level security applications. It is part of the D Squared wireless family.

With the external antenna, the DPR-A is a more efficient radiator than the DPR for somewhat greater range.

The DPR-A transmitter may also be used as a stand alone recorder. The industry standard .wav (BWF) file format employed is compatible with essentially any audio or video editing software. The DPR can be jammed with time code sync for each audio file alignment during post production. NOTE: The transmitting and recording functions cannot be used simultaneously. Users must choose to transmit or record.

The transmitter is specially designed with high efficiency digital circuitry for extended operating time on two AA batteries, with status indicated by a multi-color LED. An IR (infrared) port is included to simplify setup with IR enabled receivers. Updates can be made via SD card.

The input amplifier uses an ultra low noise op-amp for quiet operation. It is gain controlled with a wide range, dual envelope limiter, providing over 30 dB of headroom above full modulation. A 24-bit A-D converter digitizes the audio, then filters out supersonic noise above 21 kHz.

The antenna is formed between the machined aluminum housing of the transmitter and the attached microphone or cable. It functions as a dipole radiator when attached to a hand-held microphone and somewhat like a ground plane antenna when connected with a cable or plugged directly into a mixer. The conical shaped collar on the input coupler is made of DuPontTM Delrin® to improve the ERP of the antenna in the uppermost frequency bands.

Setup and adjustments are achieved through a backlit LCD, membrane switches and an intuitive menu structure. The DPR also offer hands free setup and adjustment using audible tones via the LectroRM mobile app. Remotely, the DPR can be powered on and off, and the frequencies and audio levels can be adjusted. Other features include input gain adjustment in 1 dB increments over a 55 dB range and adjustable low frequency audio roll-off for 3 dB down points at 25, 35, 50, 70, 100, 120 or 150 Hz to control subsonic and very low frequency audio content.

Specifications

<Operating Frequencies> US: 470.100 - 607.950 MHz <//Operating Frequencies> <Frequency Selection Steps> 25 kHz </Frequency Selection Steps> <RF Power output> Selectable 25/50 mW </RF Power output> <Frequency stability> ± 0.002% </Frequency stability> <Digital modulation> 8PSK </Digital modulation> <Spurious radiation> US: Compliant with ETSI EN 300 422-1 v1.4.2, E01: Compliant with ETSI EN 300 422-1 v2.1.2 </Spurious radiation> <Equivalent input noise> –125 dBV (A-weighted) </Equivalent input noise> <Input level> Nominal 2 mV to 300 mV, before limiting Greater than 1V maximum, with limiting </Input level> <Input impedance> 1K Ohm </Input impedance> <Input limiter> Dual envelope type; 30 dB range </Input limiter> <Gain control range> US: 44 dB in 1 dB steps; digital control E01: 55 dB in 1 dB steps; digital control </Gain control range> <Modulation indicators> Dual bi-color LEDs indicate modulation of -20, -10, 0, +10 dB referenced to full modulation, LCD bar graph </Modulation indicators> <Encryption> AES 256-CTR (per FIPS 197 and FIPS 140-2) </Encryption> <Audio Performance> </Audio Performance> <Frequency Response> US> 25 Hz to 20 kHz, (+0, -3dB) </Frequency Response> <E01> 20 Hz to 20 kHz, (+/-1dB) </E01> <Low frequency Roll-off> US: Adjustable for -12dB @ 10, 20, 80, or 135 Hz E01: Adjustable for -3dB @ 20, 35, 50, 70, 100, 120 or 150 Hz </Low frequency Roll-off> <Input Dynamic Range> 110 dB (A), before limiting 125 dB (with full Tx limiting) </Input Dynamic Range> <Controls & Indicators> LCD w/membrane switches, LED audio level indicators </Controls & Indicators> <Audio Input Jack> Standard 3-pin XLR (female) </Controls & Indicators> <Phantom Power> 5V @ 18 mA max., 15V @ 15 mA max. and 48 V @ 4 mA max., plus “OFF” </Phantom Power> <IR (infrared) port> For quick setup by transferring settings from an IR enabled receiver </IR (infrared) port> <Antenna> Housing and attached microphone form the antenna. </Antenna> <Battery> Two 1.5 Volt AA (lithium recommended) </Battery> <Battery Life> AA lithium; No Phantom Power: 6h 0m AA lithium; 48V Phantom Power: 3h 30m </Battery Life> <Weight> 7.8 ozs. (221 grams) </Weight> <Dimension> 4.21” L [excluding antenna> DPR-A] x 1.62” W x 1.38” H (106.9 L x 41.1W x 35.0 H mm) </Dimension> <Emission Designator> 170KG1E </Emission Designator> <RECORDER> </RECORDER> <Storage media> microSDHC memory card (HC Type) </Storage media> <File format> .wav files (BWF) </File format> <A/D converter> 24-bit </A/D converter> <Sampling rate> 48 kHz </Sampling rate> <Recording modes/Bit rate> HD mono: 24 bit - 144 kb/s </Recording modes/Bit rate> <Input Type> Analog mic/line level compatible; servo bias preamp for 2V and 4V lavaliere microphones </Input Type> <Input level> Dynamic mic: 0.5 mV to 50 mV, Electret mic: Nominal 2 mV to 300 mV, Line level: 17 mV to 1.7 V </Input level> <Input connector> TA5M 5-pin male <Input connector> <Timecode Connector> 3.5 mm TRS </Timecode Connector> <Signal voltage> 0.5 Vp-p to 5 Vp-p </Signal voltage> <Input impedance> 10 k Ohms </Input impedance> <Format> SMPTE 12M - 1999 compliant </Format> <Audio Performance> </Audio Performance> <Frequency response> 25 Hz to 20 kHz; +0.5/-1.5 dB </Frequency response> <Dynamic range> 110 dB (A), before limiting 125 dB (with full Tx limiting) </Dynamic range> <Distortion> < 0.035% </Distortion> <Operating temperature range> Celsius -20 to 50, Fahrenheit: -5 to 122 </Operating temperature range>

In the Box

DPR-A transmitter
PHTRAN3-A pouch with belt clip
(2) AA Lithium batteries
AMM-19 antenna
AMM-22 antenna

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