MPN #SMWB-B1    
Lectrosonics SMWB (B1: 537.600 - 614.375 MHz, BLOCKS 21, 22, 23)


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The design of the SMWB transmitter delivers the advanced technology and features of Digital Hybrid Wireless in a Lectrosonics belt-pack transmitter at a modest cost. Single Battery

To meet the demand for both extended operating range and extended battery life, the "WB" series SM transmitters offer selectable output power of 25, 50 and 100 mW. With higher power output, the operating range is improved at the expense of battery life. When range is not an issue, a lower power level can be used to extend the battery life.

The transmitters offer hands free setup and adjustment using audible tones. They can be put to sleep to conserve battery power during setup while buried inside costuming, then awakened for normal operation when the production begins. Other features include input gain adjustment in 1 dB increments over a 44 dB range and adjustable low frequency audio roll-off for 3 dB down points at 35, 50, 70, 100, 120 or 150 Hz to control subsonic and very low frequency audio conten

The DSP-based design works with all Digital Hybrid receivers, and is backward compatible for use with Lectrosonics 200 and 100 Series, IFB receivers and some analog receivers from other manufacturers in addition to its native Digital Hybrid Wireless operating mode.
  • Selectable output power to maximize battery life or operating range
  • Ultra-lightweight, corrosion resistant housing
  • Water resistant seals for use in damp environments
  • LCD interface with lockout option
  • Programmable compatibility modes for use with a wide variety of different receivers
  • Servo Bias input circuitry
  • IR (infrared) port for fast setup
  • Covers 3 standard frequency blocks
  • Update firmware in the field via Micro SD card reader
  • Alternate use as recorder on internal microSDHC memory card
  • Transmitter
    Operating frequencies: B1 (537.600 - 614.375 MHz)

    Channel Spacing: Selectable; 25 or 100 kHz
    RF Power output: Switchable; 25, 50 or 100 mW
    Compatibility Modes: Digital Hybrid Wireless (NU Hbr), 200 Series, 100 Series, Mode 3, Mode 6, IFB

    Pilot tone (Digital Hybrid Mode): 25 to 32 kHz; 5 kHz deviation
    Frequency stability: ± 0.002%
    Deviation: ± 75 kHz max. (Digital Hybrid Mode)
    Spurious radiation: Compliant with ETSI EN 300 422-1
    Equivalent input noise: -125 dBV, A-weighted

    Input level
    If set for dynamic mic: 0.5 mV to 50 mV before limiting, Greater than 1 V with limiting
    If set for electret lavaliere mic: 1.7 uA to 170 uA before limiting, Greater than 5000 uA (5 mA) with limiting
    Line level input: 17 mV to 1.7 V before limiting, Greater than 50 V with limiting

    Input impedance
    Dynamic mic: 300 Ohms
    Electret lavaliere: Input is virtual ground with servo adjusted constant current bias
    Line level: 2.7 k ohms

    Input limiter: Soft limiter, 30 dB range
    Bias voltages: Fixed 5 V at up to 5 mA, Selectable 2 V or 4 V servo bias for any electret lavaliere
    Gain control range: 44 dB; panel mounted membrane switches
    Modulation indicators: Dual bicolor LEDs indicate modulation -20, -10, 0, +10 dB referenced to full modulation
    Controls: Control panel w/ LCD and 4 membrane switches
    Low frequency roll-off: Adjustable from 35 to 150 Hz
    Audio Frequency Response: 35 Hz to 20 kHz, +/-1 dB

    Signal to Noise Ratio (dB)

    OFF: No Limiting, 103.5, w/Limiting, 108.0
    NORMAL: No Limiting, 107.0, w/Limiting, 111.5
    FULL: No Limiting, 108.5, w/Limiting, 113.0

    Total Harmonic Distortion: 0.2% typical (400 Series mode)
    Audio Input Jack: Switchcraft 5-pin locking (TA5F)
    Antenna: Flexible, unbreakable steel cable.
    Battery: AA lithium, disposable

    Battery Life w/ Lithium AA
    SMWB 50 mW (1 AA): 5.8 hrs
    SMWB 100 mW (1 AA): 4.4 hrs
    SMDWB 50 mW (2 AA): 11.6 hrs
    SMDWB 100 mW (2 AA): 11.2 hrs

    Weight (w/ litium batteries)
    SMWB: 3.2 oz. (90.72 grams)
    SMDWB: 4.0 oz. (113.40 grams)

    Overall Dimensions (without microphone)
    SMWB: 2.366 x 1.954 x 0.642 inches; 60.096 x 49.632 x 16.307 mm
    SMDWB: 2.366 x 2.475 x 0.642 inches; 60.096 x 62.865 x 16.307 mm

    Emission Designator: 180KF3E


    Storage media: microSDHC memory card
    File format: .wav files (BWF)
    A/D converter: 24-bit
    Sampling rate: 44.1 kHz

    Recording modes/Bit rate
    HD mono mode: 24 bit - 144 kbytes/s, 32 bit - 192 kbytes/s
    Split gain mode: 24 bit - 288 kbytes/s, 32 bit - 384 kbytes/s

    Type: Analog mic/line level compatible; servo bias preamp for 2V and 4V lavaliere microphones

    Input level
    Dynamic mic: 0.5 mV to 50 mV
    Electret mic: Nominal 2 mV to 300 mV
    Line level: 17 mV to 1.7 V

    Input connector: TA5M 5-pin male

    Audio Performance
    Frequency response: 20 Hz to 20 kHz; +0.5/-1.5 dB
    Dynamic range: 110 dB (A), before limiting
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