Lectrosonics SMV Super Miniature Wireless Microphone Transmitter (Freq Block 21)

Lectrosonics SMV Super Miniature Wireless Microphone Transmitter (Freq Block 21)

Lectrosonics SMV Super Miniature Wireless Microphone Transmitter (Freq Block 21)

B&H # LESMV21Q MFR # SMV-21
Lectrosonics SMV Super Miniature Wireless Microphone Transmitter (Freq Block 21)

Lectrosonics SMV Super Miniature Wireless Microphone Transmitter (Freq Block 21)

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Product Highlights

  • Frequency Block 21
  • Digital Hybrid Wireless Technology
  • Variable, Selectable Power Output
  • Membrane-Switch Controls w/ LCD Display
  • 256 Synthesized UHF Frequencies
  • Wide Input Dynamic Range
  • DSP-Based Pilot-Tone Signal
  • Circulator/Isolator Output Stage
  • Splash-Proof, Machined Aluminum Housing
  • Non-Corrosive, Damage-Resistant Finish
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  • 1Description

The Lectrosonics SMV Super Miniature Wireless Microphone Transmitter incorporates Lectrosonics patented Digital Hybrid Wireless technology, in a package no bigger than a pager. The SMV transmitter is miniature in size yet rugged enough to withstand rigorous daily use in the field or in studios.

To meet the demand for both extended operating range and extended battery life, the SMV transmitters offer selectable output power of 100 or 250 mW. A third selection at 50 mW is provided for some theatrical applications, where the system design specifies lower transmitter power. The SMV transmitter offers 256 user-selectable UHF frequencies. The Switchcraft TA5M audio input has user-calibrated 44 dB gain range, and accepts electret lavaliere mics, dynamic mics, or line level signals. A DSP-controlled analog audio limiter is employed before the A-D converter. The limiter has a range of more than 30 dB and a dual-release envelope, making the limiter transparent while maintaining low distortion.

Lectrosonics patented Digital Hybrid technology revolutionizes wireless microphone transmission. Digital audio signal is converted and encoded for analog transmission, then decoded and converted back to digital audio at the receiver. The result is an exceptionally low noise floor as the compandor circuit is eliminated and clear audio reception is retained at greater distances.

The non-corrosive, machined aluminum casing is splash proof and features an LCD display with membrane switch control panel. The transmitter is powered by one AA lithium, NiMH or alkaline battery for up to 7.25 hours (lithium). The SMV transmitter is completely compatible with all Lectrosonics Digital Hybrid wireless receivers, as well as older Lectrosonics analog receivers.

Variable, Selectable Output Power
The SMV features selectable 50, 100, 250 mW output power.
Miniature Design
The miniature design allows for a variety of mounting possibilities in film, video, theater, performances, etc.
Digital Hybrid Wireless Architecture
Lectrosonics incorporates digital and analog audio technology to enhance range and eliminate the noise associated with compandor circuits.
Locking TA5-Male Connection
A locking TA5M input is compatible with Lectrosonics and third-party microphones and cables. The input accepts line and microphone level signal.
Backwards Compatibility
The SMV transmitter is completely compatible with all current Lectrosonics Digital Hybrid receivers and older Lectrosonics analog receiver models as well.
Splash-Proof Enclosure
The polished aluminum enclosure is moisture proof and ideal for use in rain.
Extended Battery Life
The SMV transmitter is powered by one AA alkaline, NiMH or lithium rechargeable battery. With Lithium power, the unit is capable of up to 7.25 hours of use.
In the Box
Lectrosonics SMV Super Miniature Wireless Microphone Transmitter (Freq Block 21)
  • Antenna
  • Mic Connector Kit
  • 2 x Foam Insulating Pads
  • Belt Clip
  • Carrying Pouch
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description
    Operating Frequency 537.600 - 563.100 MHz
    Frequency Range 256 frequencies in 100 kHz steps for one 25.5 MHz wide block
    Channel Spacing 100 kHz
    Frequency Selection Control panel mounted membrane switches
    RF Power Output Switchable; 50, 100 or 250 mW
    Compatibility Modes Digital Hybrid Wireless® (400 Series), 200 Series, 100 Series, Mode 3 , Mode 6, IFB
    Pilot Tone 25 to 32 kHz; 5 kHz deviation (in 400 Series Mode)
    Frequency Stability ± 0.002%
    Deviation ± 75 kHz max. (in 400 Series Mode)
    Spurious Emission 60 dB below carrier
    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
    Limiter DSP Controlled Soft limiter, 30 dB range
    Bias Voltage(s) Fixed 5 V at up to 5 mA; selectable 2 V or 4 V servo bias for any electret lavaliere
    Gain Range 44 dB; panel mounted membrane switches
    Modulation Dual bicolor LEDs indicate modulation of -20, -10, 0, +10 dB referenced to full modulation
    Controls Control panel with LCD and four 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 SmartNR Off:
    • No Limiting: 103.5 dB
    • Limiting: 108 dB
    SmartNR Normal:
    • No Limiting: 107 dB
    • Limiting: 111.5 dB
    SmartNR Full:
    • 108.5 dB
    • 113 dB
    Total Harmonic Distortion 0.2% typical (400 Series mode)
    Audio Input Jack Switchcraft 5-pin locking (TA5F)
    Antenna Flexible, unbreakable steel cable
    Batteries One 1.5 Volt AA lithium or rechargeable; NiMH recommended
    Battery Life 50 mW:
    • Alkaline: 2 hrs
    • Lithium: 7.25 hrs
    • 2500 MA NiMH: 5 hrs
    100 mW
    • Alkaline: 1.5 hrs
    • Lithium: 5.5 hrs
    • 2500 MA NiMH: 4 hrs
    250 mW
    • Alkaline: not recommended
    • Lithium: 3 hrs
    • 2500 MA NiMH: 2.25 hrs
    Emission Standard 180KF3E
    Dimensions 2.3 x 1.8 x 0.64" (58 x 46 x 16 mm) not including microphone/lanyard
    Weight 3.7 oz.(105 g) with lithium batteries
    Packaging Info
    Package Weight 1.0 lb
    Box Dimensions (LxWxH) 9.7 x 7.9 x 3.1"

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