• 2 or 4 channel operation, true independent differential operation.
• Gain settings from 100x to 1,000,000x.
• Easy to use front panel controls.
• Programmable second order high pass and low pass, and 50/60Hz notch filtering.
• Isolating noise immune optical interface to head stages.
• Automatic overload and clip monitoring.
• Single button impedance checking (1 kHz adjustable).
• Built in programmable test signal output.
• Long 35 hour battery life with auto power-down battery saver.
• Programmable filters from 5Hz to 5khz (high) 7khz (low).

The DBA-S Digital Biological Amplifier System is a high performance programmable amplifier for EEG, EMG and ABR recording. Employing the latest in Digital Signal Processing (DSP) technology and specialized analogue and digital circuits, the DBA-S is the first digital biological amplifier. The four-channel headstage amplifies and digitizes biological signals using high performance instrumentation amplifiers and special high resolution A/D converters. The headstage is connected to the controller /receiver via a noise immune optical fibre, offering optically isolated loss-less communication. Digital Signal Processors provide precision programmable high pass, low pass and 50/60 Hz notch filtering and automatic impedance measuring. Processed headstage signals are converted back to analogue in the DB4 and made available on front panel BNC connectors. The DBA-S can be ordered with two or four channels and later upgraded to allowing up to 512 channels.

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The optional Computer Control Interface (DBA-C) allows you to control the amplifier settings from a PC. Software control can be either through the software interface that is provided or by programming from your own software (included are drivers for MATLAB, Delphi, Microsoft Visual C++, and Visual Basic).