Taking Signals to bits, Modularly

Blog Post created by HighSpeedADC on Feb 13, 2017

Modular digitizers are at the heart of data-acquisition systems and, with appropriate architecture and software, can perform well as oscilloscopes. Of course, a digitizer has an analog front end, and for best results, it needs to match your signal: differential or single-ended, voltage range, floating or grounded, 50 Ω or 10 MΩ, etc. The digitizer’s ENOB combines accuracy, resolution, noise, and distortion so all of these factors must be optimized to result in a high ENOB. If a higher ENOB device is available that also suits the rest of your requirements, your measurements will be more accurate, although probably more expensive as well. Whether a digitizer is used as a scope or DAQ system, trade-offs are necessary when you require high performance. As shown via the products that have been discussed, very high-resolution measurements are restricted in speed. Very high-speed measurements typically need more power and more volume in which to dissipate it. The highest speed modules cost more and typically don’t have a large number of channels. And, if you already have developed part of a PXI/PXIe test system, multiple PXIe digitizer modules may be more economical than opting for a high channel-count AXIe module. However, there are many hybrid systems that mix formats to advantage and some hybrid chassis that support them. Read full article on Evaluation Engineering Magazine: http://www.evaluationengineering.com/2016/02/18/taking-signals-bits-modularly


32-channel M9709A 8-bit digitizer samples at up to 1-GS/s, accommodating signal frequencies up to 500 MHz. Up to 16 GB of onboard memory supports synchronous data acquisitions.