This unique plug-on transmitter design will ideally match any microphone or line level source via a standard XLR connector. The DPR 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 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.Main Features:Wideband UHF tuning range 470-608 MHz (470-614 MHz for E01 version)Accepts microphone or line level signalsSelectable 5, 15, 48 volt phantom powerSelectable 25/50 mW RF output powerAdjustable low frequency roll-offPowered by two AA batteriesIR (infrared) port for fast setupRemote controlled dweedle tones (audio tone set-up control)Time code jam sync withSolid machined aluminum housingOn board recordingEncryption 256 Bit AES, CTR ModeSpecifications:Transmitter:Operating Frequencies:US: 470.100 – 607.950 MHzE01: 470.100 -614.375 MHzFrequency Selection Steps: 25 kHzRF Power output: Selectable 25/50 mWFrequency stability: 0.002%Digital modulation: 8PSKSpurious radiation:US: Compliant with ETSI EN 300 422-1 v1.4.2E01: Compliant with ETSI EN 300 422-1 v2.1.2Equivalent input noise: 125 dBV (A-weighted)Input level: Nominal 2 mV to 300 mV, before limiting Greater than 1V maximum, with limitingInput impedance: 1K OhmInput limiter: Dual envelope type; 30 dB rangeGain control range: 55 dB in 1 dB steps; digital controlModulation indicators:Dual bi-color LEDs indicate modulation of -20, -10, 0, +10 dB referenced to full modulationLCD bar graphEncryption: AES 256-CTR (per FIPS 197 and FIPS 140-2)Audio Performance:Frequency Response: 25 Hz to 20 kHz, (+0, -3dB)Low frequency Roll-off: Adjustable for -3dB @ 25, 35, 50, 70, 100, 120 and 150 HzInput Dynamic Range:110 dB (A), before limiting125 dB (with full Tx limiting)Controls & Indicators:LCD w/membrane switchesLED audio level indicatorsAudio Input Jack: Standard 3-pin XLR (female)Phantom Power: 5V @ 18 mA max., 15V @ 15 mA max. and 48 V @ 4 mA max., plus OFFIR (infrared) port: For quick setup by transferring settings from an IR enabled receiverAntenna: Housing and attached microphone form the antenna.Battery: Two 1.5 Volt AA (lithium recommended)Battery Life:AA lithium; No Phantom Power: 6h 0m*AA lithium; 48V Phantom Power: 3h 30m**(*Tested with a dynamic microphone) (**Tested with a Sanken CS1 for a phantom-powered microphone)Weight: 7.8 ozs. (221 grams)Dimensions: 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)Emission Designator: 170KG1E