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HomepageWirelessWireless Receivers › Lectrosonics R400a
Lectrosonics R400a

The R400a is a high performance, triple-conversion, frequency synthesized, UHF receiver fully compatible with all Lectrosonics 400 series transmitters, and various of analog models

The proprietary audio processing includes a DSP (digital signal processor) for very low distortion and a superior signal to noise ratio. The DSP eliminates a compandor and its artifacts to provide exceptional audio quality when operating in its native hybrid mode. Special DSP algorithms also provide compatibility modes for use with Lectrosonics 100 and 200 Series analog transmitters.

The R400a features a powerful menu-driven LCD graphic display operated with a push-button switch and a dual function rotary encoder control as a convenient means of viewing and altering settings. The LCD main window displays the pilot tone indicator, diversity antenna activity, RF and audio levels, operating frequency, transmitter frequency switch settings and transmitter battery status. Settings can be changed using the MENU functions. A built-in RF spectrum analyzer is included to conduct site surveys to find interference-free operating frequencies. The analyzer quickly tunes the receiver across its 256 frequencies and records a marker on the LCD indicating the strength of any RF signals picked up. Within less than a minute, a complete display is generated showing the RF activity across the entire tuning range of the receiver. An area with little or no RF activity is then easy to locate and select.
Features
  • Digital Hybrid Wireless® (U.S. Patent #7,225,135)
  • SmartSquelch™
  • SmartDiversity™
  • SmartTune™ for auto frequency selection
  • 256 selectable UHF frequencies
  • RF-controlled digital noise filters
  • Low noise, Robust RF Front End
  • DSP-based pilot tone
  • Graphics type backlit LCD display
  • Independent balanced XLR and unbalanced 1/4-inch audio outputs
  • Compatiblity modes for use with analog transmitters
  • Specifications
    Operating Frequencies (MHz)
  • Block 470: 470.100 - 495.600
  • Block 19: 486.400 - 511.900, 614.100 - 614.300
  • Block 20: 512.000 - 537.500
  • Block 21: 537.600 - 563.100
  • Block 22: 563.200 - 588.700
  • Block 23: 588.800 - 607.900
  • Block 24: 614.400 - 639.900
  • Block 25: 640.000 - 665.500
  • Block 26: 665.600 - 691.100

  • Frequency Adjustment Range: 25.5 MHz in 100 kHz steps
    Channel Separation: 100 kHz
    Receiver Type: Triple conversion, superheterodyne, 244 MHz, 10.7 MHz and 300 kHz
    Frequency Stability: ±0.001 %
    Front end bandwidth: ±30 MHz @ -3 dB

    Sensitivity
  • 20 dB Sinad: 1 uV (-107 dBm), A weighted
  • 60 dB Quieting: 1.5 uV (-104 dBm), A weighted

  • Squelch quieting: Greater than 100 dB
    AM rejection: Greater than 60 dB, 2 uV to 1 Volt (Undetectable after processing)
    Modulation acceptance: 85 kHz
    Image and spurious rejection: 85 dB
    Third order intercept: 0 dBm
    Diversity method: Phased antenna combining - SmartDiversity™
    FM Detector: Digital Pulse Counting Detector operating at 300 kHz
    Antenna inputs: Dual BNC female, 50 Ohm impedance

    Audio outputs
  • Rear Panel XLR adjustable from -50 dBu to +5 dBu in 1 dB steps. Calibrated into a typical 10 k Ohm balanced load. Can drive 600 Ohm load.
  • Rear Panel 1/4 inch jack adjustable from -55 dBu to +0 dBu in 1 dB steps.


  • Front Panel Controls and Indicators
  • Rotary Control Knob: Combined push/rotate switch combination for menu selection and system configuration.
  • Pushbutton: Press and hold several seconds for POWER OFF. Momentary press (if unit is powered up) for return to previous window

  • LCD Main window: Pilot tone; antenna phase, transmitter battery status; audio level, RF level; Battery timer; Frequency; and Transmitter switch setting

  • Audio output level adjustment: -50 dBu to +5 dBu, XLR and 1/4 inch connectors independently adjustable
  • Reviews
    Price
    $1555.00
    $1097.00
    Eligible for free shipping in Canada. Learn more
    Additional information
    For more information about the R400a, please visit the website of Lectrosonics
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