Lectrosonics SPNCWB - Wideband Bridging Conference Interface

Lectrosonics SPNCWB - Wideband Bridging Conference Interface

Lectrosonics SPNCWB - Wideband Bridging Conference Interface

B&H # LESPNCWB MFR # SPNCWB
Lectrosonics SPNCWB - Wideband Bridging Conference Interface

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Product Highlights

  • Wideband Acoustic Echo Canceller
  • 3-Way Bridging
  • Dual Codec interfaces
  • TCP/IP Ethernet Addressable
  • Full ASPEN Digital Matrix Integration
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  • 1Description
The SPNCWB from Lectrosonics is a wideband conference interface that makes tele-presence and multi-site bridging simple and effective in any conference room, with full bandwidth audio frequency response and a unique Quad-reference AEC (Audio Echo Canceller).

Each conference connection includes a dedicated AEC for fast and reliable echo cancellation. The AEC converges very fast and will remain converged during double-talk and any signal type, including sine waves, enabled by an advanced DSP algorithm. Cancellation depth increases even with brief signal peaks from the far ends.

The AEC in combination with the proportional gain mixing algorithm provides excellent audio quality without echo heard at the far ends. Signals from the far ends of the conference are routed to the local sound system and to three mixes that are used as reference signals by the AEC. Audio from the local microphones (which includes far end audio delivered by local loudspeakers) is routed to the AEC via another final mix for cancellation of the far end signals. After processing, the output of the AEC is routed back to the far ends through the matrix.

A full complement of audio signal processing is provided for all inputs and outputs. In addition, a proprietary NRF (Noise Reduction Filter) is provided on each input to suppress noise in severe conditions. The NRF employs a proprietary noise reduction algorithm using a 1/3 octave analysis and downward expansion.

The amount of noise reduction applied to the signal at each input is adjustable from 6 dB to 35 dB as needed for the signal conditions and individual preferences. The process is very effective, with almost no audible artifacts up to about 18 dB. Higher values are available for very poor conditions where noise is extremely high and intelligibility is improved at the expense of artifacts in the audio.

A two channel power amplifier is included for loudspeakers in the local sound system. The power amplifier is driven by final mix outputs from the matrix and has a full set of signal processing, including delay, parametric EQ, compressor and limiter. Class-D amplification with a late generation component provides efficiency, low heat and excellent audio performance. The amplifiers cannot be damaged by wiring errors or unusual loads. The processor interconnects with other ASPEN processors via the 1Gbp bus built into all models.
Quad-reference wideband acoustic echo canceller supporting 3-way bridging
Two maximum speed grade, 4th generation SHARC processors
Dual codec interfaces
TCP/IP Ethernet addressable
Fully integrated with ASPEN digital matrix
Adaptive proportional gain automatic mixing at the matrix cross-points
Third octave noise filter on each channel
Sigma-Delta class-D audio power amplifiers
In the Box
Lectrosonics SPNCWB - Wideband Bridging Conference Interface
  • AC Power Cable
  • Three (3) Year Limited Warranty
  • Table of Contents
    • 1Description
    Echo Cancellation Acoustic Echo Canceller: 128 ms tail time - will never diverge, regardless of signal type (i.e. sine wave)
    Line Echo Canceller: 48 ms tail time
    Telephone Hybrid Return Loss: 26 dB + line echo canceller = 45 dB
    Audio Inputs Codec: 1 x 5-pin Phoenix
    Input Impedance: 15kΩ (differential); 375kΩ (common)
    Gain: -20 dB to +20 dB, programmable in 1 dB steps
    Audio Outputs Codec: 1 x 5-pin Phoenix, floating balanced
    Output Impedance: 50Ω
    Nominal Level: 0 dBu
    Headphone: 1 x 1/4" TRS (front panel)
    Amplifier Output: 1 x 5-pin Phoenix
    Other Connectors 1 x USB Type B (front panel)
    2 x RJ-11 Telephone Set/Line
    2 x RJ-45 Remote Control
    2 x RJ-45 ASPEN Port
    2 x DB-25 Programmable Logic
    1 x RJ-45 Ethernet
    1 x DB-9 RS-232
    Proprietary Network Physical level: LVDS (Low Voltage DIfferential Signal) high speed
    Cable Type: CAT-6
    Transmission Speed: 1 Gbps
    Control Input Number of Inputs: 15
    Analog Voltage Range: 0-5V
    Logic Input: TTL, LVTTL, CMOS, LVCMOS
    Control Output Number of Logic Outputs: 8
    Logic Control: Active low
    Max Sink Current: 100 mA
    Max Supply Voltage: 40V
    Supply Voltage for Control I/O: 5V
    Max Current: 750 mA
    Remote Control Codec 1: Lectrosonics RCWTH4, RJ-45 jack
    Telephone: Lectrosonics RCWTH4, RJ-45 jack
    Power Requirements 100~240VAC, 50/60 Hz
    15W power consumption
    Dimensions (WxDxH) 19 x 7.25 x 1.72" (483 x 184 x 44 mm)
    Weight 3.6 lb (1.6 kg)
    Packaging Info
    Package Weight 9.0 lb
    Box Dimensions (LxWxH) 24.0 x 14.6 x 6.6"

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