Lectrosonics DSR 2-Channel Digital Slot Mount Receiver

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The Lectrosonics DSR digital receiver provides the highest level of RF and audio performance available with a versatile feature set in a compact design for camera-mounted applications. Settings can be made from the front panel, making the unit ideal for use in camera hop configurations, in bags and on sound carts. An RF spectrum analyzer and SmartTune are built into the receivers to alleviate interference problems in an increasingly congested RF spectrum.

The mechanical design of the receivers fits into the SuperSlot ecosystem and combines field-proven features developed over many years of experience in motion picture and television production. To decrease weight, the DSR provides a two-channel receiver in one unit powered by external DC. The receiver is also equipped with an IR port for data transfer between units. The machined aluminum housing and panels are surfaced with a hard-anodized finish with laser etched markings to withstand the rigors of field production.

The RF gain stages in the front-end use a newly developed design to provide low-noise RF amplification, excellent sensitivity, and extremely low susceptibility to intermodulation and de-sensitization.

Vector Diversity
An ideal diversity system constructively combines all the energy available at both antennas. Traditional "true diversity" or "ratio diversity" methods use two complete receivers and blend the audio. This works well for FM and Digital Hybrid systems, but falls short of the ideal for today's all-digital modes. The DSR's Diversity subsystem smoothly and continuously combine RF signals from two receiver front-ends per channel, with differing phase angles in order to obtain maximum energy. Not only does this method deliver clean, artifact-free performance in all modes, it is actually able to take two signals compromised by multipath interference and reassemble them into a usable signal.

Compatibility
The DSR offers compatibility with the D-Squared and Duet digital transmitters, including the DBu, DHu, DPr, DBSM, DCHT, and M2T, and backward compatibility with any Digital Hybrid Wireless transmitters including the SM and SMWB series, WM, HM Series, MM400 Series, HH Series, LT, LMb, UM400 Series, and SSM.

SmartNR
With a noise floor at -120 dBV and a frequency response to 20 kHz, high frequency noise in the source audio is more apparent than in conventional wireless systems. The SmartNR algorithm has three modes. When OFF, no noise reduction is performed. When NORMAL is selected, enough noise reduction is applied to remove most of the hiss from the mic preamp and some of the hiss from lavaliere microphones. When FULL is selected, enough noise reduction is applied to remove most of the hiss from nearly any signal source of reasonable quality, assuming levels are set correctly at the transmitter.

Lectrosonics DSR Digital Receiver - Features:

• Two independent channels, compact design
• Vector diversity for superior performance
• Latest generation of SR Series: Compatible with huge existing ecosystem
• Compatible with D2, HDM, Duet and DCHX Digital modes and all hybrid modes
• 24 bit/48 kHz digital for flawless audio
• AES 256-bit, CTR mode encryption, with 4 different key policies available
• Analog and AES3 digital audio outputs
• External DC powering options and USB input for firmware updates and data transfer

• Operating Frequencies:
  • Model A1B1: 470.100 - 614.375 MHz
  • Model B1C1: 537.600 - 691.175 MHz
  • 941: 941.525 - 959.825 MHz
• Frequency Selection Steps: 25 kHz
• Frequency Stability: ± 0.001 %
• Front End Bandwidth: ± 5.5 MHz @ -3 dB
• Sensitivity:
  • 20 dB SINAD: 1.0 uV (-107 dBm), A-weighted
  • 60 dB Quieting: 1.12 uV (-105 dBm), A-weighted
• AM Rejection: > 60 dB, 2 uV to 1 Volt
• Modulation Acceptance: 85 kHz
• Spurious Rejection: 85 dB
• 3^rd Order Intercept: +11 dBm
• Diversity Method: Vector diversity
• Antenna Inputs: 50 Ohm; SMA female connectors
• Audio Outputs Connectors:
  • Interchangeable D connector adapters for camera slot interfaces
  • Dual TA3 male (mini XLR) balanced output adapter
  • Balanced sled adapters with TA3 male outputs
• Front Panel Output (DSR5P version): Control panel TA5M with two balanced outputs
• Audio Performance (Overall System):
  • Frequency Response: 25 Hz to 20 kHz (+0/-3 dB)
  • THD: 0.2% (typical)
  • SNR at Receiver Output (db):

  SmartNR	No Limiting	With Limiting
  OFF	103.5	108.0
  NORMAL	107.0	111.5
  FULL	108.5	113.0

• Input Dynamic Range: 125 dB (with full Tx limiting)
• Overall Latency (Time Delay): 1.4 ms with digital source, <2.9 ms with Hybrid TX
• Audio Test Tone: 1 KHz, -50 to +7 dBu, <1%THD
• Controls:
  • Front Panel:
    • Color LCD display
    • Menu/Sel, Pwr/Back, Up/Down Arrow Buttons
    • USB port
    • IR port
  • Rear Panel: proprietary connector for audio/power accessory panels
• Powering & Current Consumption: Min. 7 V to max. 18 Volts DC; 2.2 W
  • 125 mA @ 18 VDC
  • 80 mA @ 12 VDC
  • 295 mA @ 7 VDC
• External Power: Minimum 9 Volts to maximum 17 VDC 2.7 W; 225 mA at 12 VDC
• Dimensions (W x H x D): 3.23 x 1.23 x 5.5 in | 82 x 31 x 140 mm
• Weight:
  • DSR: 5.8 oz | 164 g, w/o audio adapter
  • DSR5P: 6.9 oz | 195 g