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.Main Features:Wideband UHF tuning range 470-608 MHzAccepts 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)Removeable SMA-mount antennaSolid machined aluminum housingOn board recording with time code jam syncEncryption 256 Bit AES, CTR ModeSpecifications:Operating Frequencies:DPR-A: 470.100 – 607.950 MHzDPR-A/E01: 470.100 – 614.375 MHzDPR-A/E01-B1C1: 537.600 – 691.175 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 v1.4.2Equivalent input noise: 125 dBV (A-weighted)Input level:Nominal 2 mV to 300 mV, before limitingGreater 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 OFF IR (infrared) port: For quick setup by transferring settings from an IR enabled receiverAntenna: External SMA antenna jackBattery: 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 0mWeight: 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: 170KG1