Lectrosonics SMWB Wideband Beltpack Transmitter (C1: 614.400 to 691.175 MHz)

Lectrosonics SMWB Wideband Beltpack Transmitter (C1: 614.400 to 691.175 MHz)

Lectrosonics SMWB Wideband Beltpack Transmitter (C1: 614.400 to 691.175 MHz)

B&H # LESMWBC1 MFR # SMWBC1
Lectrosonics SMWB Wideband Beltpack Transmitter (C1: 614.400 to 691.175 MHz)

Lectrosonics SMWB Wideband Beltpack Transmitter (C1: 614.400 to 691.175 MHz)

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Product Highlights

  • For Broadcast, EFP and ENG Applications
  • Digital Hybrid Wireless Technology
  • Alternate Recording Function
  • 35 Hz to 20 kHz Frequency Range
  • Runs on 1 x AA Battery
  • 44 dB of Gain Range
  • Use with Lavs & Dynamic Mics or Line Levels
  • Selectable High-Pass Filtering
  • Built-In Limiter with 30 dB of GR
  • Flexible Steel-Cable Antenna
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Frequency Band: C1: 614.400 to 691.175 MHz

A1: 470.100 to 537.575 MHz

New Item - Coming Soon

B1: 537.600 to 614.375 MHz

New Item - Coming Soon

C1: 614.400 to 691.175 MHz

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Lectrosonics SMWB overview

  • 1Description

The Lectrosonics SMWB is a wireless beltpack transmitter that can also act as a recording device, capturing audio onto microSDHC cards. Paired with a lavalier or dynamic microphone, the transmitter is suitable for ENG (Electronic News Gathering), EFP (Electronic Field Productions), interviews for broadcast TV, and more. It provides Digital Hybrid Wireless technology, combining 24-bit digital-audio processing with an analog FM radio link to give you the benefits of both worlds, such as fewer dropouts and audio artifacts while maintaining a robust range of operation. The transmitter is housed in a machined aluminum case, lending the unit a rugged and dependable shell. Its water-resistant control panel adds to its usability.

Operating in the C1 range (614.400 to 691.175 MHz), the transmitter offers selectable outputs to bolster its operating range, specifically among 25, 40, and 100mW. At lower values, the transmitter’s battery life will last longer; at higher values, the operating range is increased, though at the expense of battery life. Lightweight at 2.7 oz, the transmitter boasts settings which make it compatible with dynamic microphones, electret lavaliers, and even line-level sources—so long as they can plug into the TA5M 5-pin input connector.

Input gain adjustment is possible in 1 dB increments for a total range of 44 dB. You’ll also note the low-pass filters, which can be switched to roll off at 30, 50, 70, 120, or 150 Hz to mitigate low-end disturbances. This input section also boasts servo-bias input circuitry proprietary to Lectrosonics, as well as an analog limiter controlled with DSP that, sitting ahead of the mic preamp itself, protects the audio path from overload. With its dual-release envelope, it maintains acoustic transparency, even though it can achieve over 30 dB of gain reduction.

The SMWB utilizes DSP that renders it suitable for use with all Lectrosonics Digital Hybrid receivers, though it is also backward compatible for use with 100 and 200 series transmitters, IFB receivers, and various analog receivers from third-party manufactures. The unit is powered by one AA battery, making use of switching power supplies to offer consistent voltages to its internal circuitry throughout its battery life.

Expanding the SMWB’s functionality is its built-in recording capability, for use when transmission is simply not possible due to the conditions of the environment. The recorder operates at 24-bit/44.1 kHz, recording .WAV files to microSDHC cards. As a transmitter, the SMWB supplies an audio frequency range of 35 Hz to 20 kHz, though during recording, that lower value extends down to 20 Hz. You cannot use the transmitter and the recorder simultaneously, but it’s nice to have the option to select between the two. The transmitter includes a flexible steel-cable antenna.

Key Features at a Glance
  • Selectable output power to maximize battery life or operating range
  • 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 three standard frequency blocks
  • Update firmware in the field via MicroSD card reader
  • Can also be used as a recorder on internal microSDHC memory card
In the Box
Lectrosonics SMWB Wideband Beltpack Transmitter (C1: 614.400 to 691.175 MHz)
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Lectrosonics SMWB specs

    Transmitter
    Operating Frequencies C1: 614.400 to 691.175 MHz
    Channel Spacing Selectable between 25 or 100 kHz
    RF Power Output Switchable among 25, 50 and 100 mW
    Compatibility Modes Digital Hybrid Wireless (NU Hbr), 200 Series, 100 Series, Mode 3, Mode 6, IFB
    Pilot Tone 25 to 32 kHz; 5 kHz deviation (digital hybrid mode)
    Frequency Stability 0.002%
    Deviation 75 kHz maximum (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 to 50 mV before limiting, greater than 1 V with limiting
    If set for a lavalier mic: 1.7 to 170 uA before limiting; greater than 5000 uA (5 mA) with limiting
    If set for line-level input: 17 mV to 1.7 V before limiting; greater than 50 V with limiting
    Input Impedance Dynamic mic: 300 Ohms
    Lavalier: Input is virtual ground with servo adjusted constant current bias
    Line level: 2.7 kOhms
    Input Level Soft limiter, 30 dB range
    Bias Voltage Fixed 5 V at up to 5 mA; selectable servo bias for any electret lavalier (2 or 4 V)
    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 with 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 Off: 103.5 dB (no limiting); 108.0 dB (with limiting)
    Normal: 107.0 dB (no limiting); 111.5 dB (with limiting)
    Full: 108.5 dB (no limiting); 113.0 dB (with limiting)
    THD 0.2% typical (400 Series mode)
    Audio Input Jack Switchcraft 5-pin locking (TA5F)
    Recorder
    Storage Media microSDHC memory card
    File Format .WAV files (BWF)
    A/D Converter 24-bit
    Sampling Rate 44.1 kHz
    Recording Modes HD mono mode
    24-bit: 144 kbps 32-bit: 192 kbps

    Split gain mode
    24-bit: 288 kbps
    32-bit: 384 kbps
    Input Analog mic/line level compatible; servo bias preamp for lavalier microphones (2 and 4 V)
    Input Level Dynamic mic: 0.5 to 50 mV
    Electret mic: Nominal, 2 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-weighted), before limiting
    Distortion: < 0.035%
    Operating Temperature Range -5 to 122°F / -20 to 50°C
    General
    Antenna Flexible, unbreakable steel cable
    Battery AA lithium, disposable
    Battery Life (approx.) 50 mW (1 x AA): 7.3 hours
    100 mW (1 x AA): 5.5 hours
    Dimensions 2.3 x 1.8 x 0.6" / 58 x 46 x 16 mm (without microphone)
    Weight 2.7 oz / 75.9 g (with batteries)

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