Lectrosonics SMV Wireless Microphone Transmitter (multiple blocks)

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.

Full Description:

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.

 

Operating Frequency 537.600 - 563.100 MHz (FOR BLOCK 21)
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

 

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