Lectrosonics DPR-A Digital Plug On Transmitter

This unique plug-on transmitter design will ideally match any microphone or line level source via a standard XLR connector. The DPR-A can tune in 100 kHz or 25 kHz 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. The external antenna provides exceptional operating range.

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.

Key Features

• Wideband UHF tuning range - 470-608 MHz
• Accepts microphone or line level signals
• Selectable 5, 15, 48 volt phantom power
• Selectable 25/50 mW RF output 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)
• Removeable SMA-mount antenna
• Solid machined aluminum housing
• On board recording with time code jam sync
• Encryption 256 Bit AES, CTR Mode

Technical Specifications

Operating Frequencies
DPR-A 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
US Compliant with ETSI EN 300 422-1 v1.4.2
Equivalent input noise
-125 dBV (A-weighted)
Input level
Nominal 2 mV to 300 mV, before limiting
Greater than 1V maximum, with limiting
Input impedance
1K Ohm
Input limiter
Dual envelope type; 30 dB range
Gain control range
55 dB in 1 dB steps; digital control
Modulation indicators
Dual bi-color LEDs indicate modulation of -20, -10, 0, +10 dB referenced to full modulation
LCD bar graph
Encryption
AES 256-CTR (per FIPS 197 and FIPS 140-2)
Frequency Response
25 Hz to 20 kHz, (+0, -3dB)
Low frequency Roll-off
Adjustable for -3dB @ 25, 35, 50, 70, 100, 120 and 150 Hz
Input Dynamic Range
110 dB (A), before limiting
125 dB (with full Tx limiting)
Controls & Indicators
LCD w/membrane switches
LED audio level indicators
Audio Input Jack
Standard 3-pin XLR (female)
Phantom Power
5V @ 18 mA max., 15V @ 15 mA max. and 48 V @ 4 mA max., plus “OFF”
IR (infrared) port
For quick setup by transferring settings from an IR enabled receiver
Antenna
External SMA antenna jack
Battery
Two 1.5 Volt AA (lithium recommended)
Battery Life
AA Lithium, 48v phantom power engaged:
SCHOEPS CMIT 5U 7h 25m
SCHOEPS CMC6-U/MK41 7h 20m
SANKEN CS-1 8h 0m
Weight
7.8 ozs. (221 grams)
Dimensions
4.21” L x 1.62” W x 1.38” H (106.9 L x 41.1W x 35.0 H mm)
Emission Designator
170KG1E

Recorder
Storage media
microSDHC memory card (HC Type)
File format
.wav files (BWF)
A/D converter
24-bit
Sampling rate
48 kHz
Recording modes/Bit rate
HD mono 24 bit - 144 kb/s
Input
Type Analog mic/line level compatible; servo bias preamp for 2V and 4V lavaliere microphones
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
Timecode
Connector 3.5 mm TRS
Signal voltage 0.5 Vp-p to 5 Vp-p
Input impedance 10 k Ohms
Accuracy <1 PPM with TCXO
Format SMPTE 12M - 1999 compliant
Frequency response
25 Hz to 20 kHz; +0.5/-1.5 dB
Dynamic range
110 dB (A), before limiting
125 dB (with full Tx limiting)
Distortion
< 0.035%
Operating temperature range
Celsius -20 to 50
Fahrenheit -5 to 122
Included Accessories
PHTRAN3-A pouch with belt clip
AA Lithium batteries
AMM-19 antenna
AMM-22 antenna