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Lectrosonics LR
75 MHz Mini Digital Receiver


The purpose and intent of Lectrosonics' LR receiver design is excellent performance in a small package for ENG and DSLR video production.
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Selected Model Price: $1,219.00
List Price: $1,665.00
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Lectrosonics LR
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The purpose and intent of Lectrosonics' LR receiver design is excellent performance in a small package for ENG and DSLR video production.

Its front-end tracking filters block interference from high powered RF signals on nearby channels to preserve the extended operating range, and RF spectrum scanning displays results on the LCD to make finding clear spectrum quick and easy.

The receiver is powered by internal AA batteries or with an optional battery eliminator, and the top panel includes an IR port for transmitter setup. Firmware updates are enabled via a USB port on the side panel. The housing is made from a solid machined aluminum billet.

Lectrosonics LR Receiver Features:

  • Tunes over a 75 MHz range*
  • Tracking front-end filters
  • Digital Hybrid Wireless® with compatibility modes for use with earlier transmitters
  • Compact size powered by two AA batteries or an optional battery eliminator
  • LCD with RF spectrum scanning
  • SmartSquelchTM noiseless muting adapts automatically for near/far operation
  • DSP-based pilot tone for squelch control
  • USB port for firmware updates
  • IR sync port for transmitter setup

Lectrosonics LR Receiver Specifications:

  • Operating Frequencies:
    • Tuning range A1: 470.100 - 537.575 MHz
    • Tuning range B1: 537.600 - 614.375 MHz
    • Tuning range C1: 614.400 - 691.175 MHz
    • Tuning range D1: 691.200 - 767.975 MHz (export only)
  • Frequency selection steps: Selectable; 100 kHz or 25 kHz
  • Receiver Type: Dual conversion, superheterodyne
  • IF Frequencies: 243.950 MHz and 250.000 kHz
  • Frequency stability: ±0.001 %
  • Front end bandwidth: 20 MHz @ -3 dB
  • Sensitivity
    • 20 dB SINAD: 1.0 uV (-107 dBm), A weighted
    • 60 dB Quieting: 2.2 uV (-100 dBm), A weighted
  • Squelch quieting: Greater than 100 dB typical
  • Modulation acceptance: +/-100 kHz max.; varies with selected compatibility mode
  • Image and spurious rejection: 85 dB
  • Third order intercept: 0 dBm
  • Diversity method: SmartDiversity phased antenna combining
  • FM detector: Digital Pulse Counting Detector
  • RF spectrum analyzer: Single and multiple block scanning modes; coarse and fine views of results
  • Antenna inputs: 50 Ohm; SMA female connectors
  • Audio output: TA3 male (mini XLR) balanced output
  • Audio output level: Adjustable -50 to +5 dBu in 1 dB steps; unbalanced output level is 6 dB lower
  • Front panel controls and indicators:
    • Sealed panel with membrane switches
    • LCD for setup menus and monitoring
  • Audio test tone: 1 kHz, -50 dBu to +5 dBu output (bal); 1% THD
  • Transmitter battery type selection: AA alkaline or lithium; timer available for use with alkaline, lithium and HiMH
  • Audio polarity selection: Normal or inverted
  • Compatibility modes:
    • Digital Hybrid (North American and European)
    • Lectrosonics 100, 200 and 300 Series
    • Lectrosonics IFB
    • Non-Lectrosonics modes 3, 6 and 7 (contact the factory fordetails)
  • SmartNR (noise reduction): OFF, NORMAL, FULL modes (available in Digital Hybrid mode only)
  • System frequency response: 32 Hz to 20 kHz (+/- 1 dB) receiver only (see transmitter documentation for overall system response)
  • Signal-to-noise ratio:
    • SmartNR OFF: 103.5 (no limiting); 108.0 (w/ limiting)
    • SmartNR NORMAL: 107.0 (no limiting); 111.5 (w/ limiting)
    • SmartNR FULL: 108.5 (no limiting); 113.0 (w/ limiting)

*Note: The dual envelope "soft" limiter provides exceptionally good handling of tranients using variable attack and release time constants. Once activated, the limiter compresses 30+ dB of transmitter input range into 4.5 dB of receiver output range, thus reducing the measured figure for SNR without limiting by 4.5 dB

  • Total harmonic distortion: <0.4 (0.2% typical in Digital Hybrid mode)
  • Top panel features:
    • TA3M audio output jack
    • (2) SMA antenna jacks
    • IR (infrared) port
  • Operating runtimes: 4 hours, AA alkaline
  • Operating temperature: -20° C to +50° C
  • Weight: 185.4 grams (6.54 oz) with two AA lithium batteries
  • Dimensions (housing): 3.21 x 2.45 x .84 in. (82 x 62 x 21 mm)
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