Sig32C-4 Multichannel DSP Board, with Very High Signal Quality

This board is not suggested for new applications. It is still supported by Signalogic, and may be available in some limited cases. Please check in with Signalogic.

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The Sig32C-4 is a plug-in board for PCs (ISA bus) which combines the power of the 32-bit floating point DSP32C device with four (4) channels of highest-quality analog input and output. Each I/O channel is 16-bit sigma-delta and is capable of sample rates up to 48 kHz. All input and output channels are sampled simultaneously. The sigma-delta technology provides sharp roll-off (more than -160 dB/octave) anti-alias and reconstruction filters which track automatically with the software-programmed sampling rate, and nearly ideal linear phase response.

Primary applications are in the fields of acoustic and audio measurement and analysis, speech processing, vibration measurement and analysis, 3-D sound, signal synthesis, and applications requiring multiple sensors.

Sig32C-4 Feature Summary

half-size ISA board with 32-bit floating-point DSP, onboard SRAM, 4-channel analog I/O subsystem with programmable gain, and parallel digital I/O
50 or 80 MHz, 32-bit floating-point Lucent (AT&T) DSP32C (80, 62.5, or 50 nsec instruction cycle)
either 128 or 640k x 32 of onboard zero wait-state SRAM
four (4) channels of 48 kHz 16-bit analog input and output with following features:
- based on 2x CS5336 stereo A/D and 2x CS4328 stereo D/A sigma-delta converters with simultaneous sampling, "brickwall" anti-alias and reconstruction filtering, and linear phase response
- 92 dB SNR, typical
- channel-independent, software-programmable input gain from 0 to 18 dB using differential input amplifiers (Burr-Brown PGA205)
- inputs and outputs are dc-coupled
- software programmable sampling rate from 8 to 48 kHz, including audio rates 11.025, 22.5, and 44.1 kHz
16-bit parallel digital I/O
supported by DirectDSP® and Hypersignal software
PCI version available 4Q99

Sig32C4 Specifications and Data Sheets

Sig32C-4 Software Support

The Sig32C-4 is fully supported by Signalogic's Hypersignal®-Macro and Hypersignal-Acoustic software packages. In addition, both the board and Hypersignal packages can also be used with DirectDSP, which offers C/C++, Visual Basic, and MATLAB® programming interfaces. Used in conjunction with the Sig32C-4, the DirectDSP/Hypersignal software combination provides sophisticated DSP-based instrumentation, visualization and display of waveforms, block-diagram based automation of development and test sequences, and numerous tools for all levels of DSP product, system, and algorithm development. The complete range of DSP/math functions, interactive waveform display and editing, difference equations, filter design, and real-time code development facilities offered by the software is fully active with the Sig32C-4. Display examples include interactive frequency domain waterfall and contour (joint time-frequency), .WAV display, pole-zero, unwrapped phase, and group delay.

Signalogic software takes full advantage of the multichannel capability of the Sig32C-4. Instruments can show any two of the four channels at once, and any number and combination of the four channels can be recorded and generated continuously to/from hard disk. Instrumentation includes digital oscilloscope, real-time spectrum analyzer, continuous signal generator (up to 4 channels), stimulus & response measurement, digital tape recorder, and more. The spectrum analyzer allows measurements such as transfer function (deconvolution), impulse response, and selective-band real-time digital filtering to be performed.

Additionally, the DSP32C DSP Source Code Interface allows real-time code to be designed, simulated and developed for the DSP32C, and results downloaded, tested and graphically debugged in real-time with the Hypersignal and DirectDSP software packages.