PC-based scopes use USB 3.0, add 512 Msample memory depth option

January 26, 2015 // By Graham Prophet
PicoScope 3000D Series oscilloscopes have up to 200 MHz bandwidth, two or four analogue channels plus 16 digital channels on the mixed-signal (MSO) models, and deep memories from 64 to 512 mega-samples.

The scopes offer a maximum real-time sampling rate of 1 Gsample/sec and feature a USB 3.0 interface; they also host a built-in arbitrary waveform generator (AWG). Deep memory enables long timebases with the fastest sampling rates; for example, at 1 Gsample/sec sampling rate you can capture a 500 msec waveform—that's half a billion samples, Pico points out—while hardware acceleration keeps the display updating smoothly.

The 512 Msample buffer memory can be segmented, enabling acquisition of up to 10 000 individual waveform segments of 50 000 samples, with less than 1 µsec re-arm time between each segment. Memory segmentation is beneficial when analysing waveform bursts or serial data packets that include long gaps. The PicoScope can be set to trigger on each packet and skip the gaps that are of no interest. This function allows users to acquire, for instance, CAN data packets over several minutes and then analyse the packet content at a later point in time.

The oscilloscopes are multi-function include a spectrum analyser and arbitrary waveform generator (AWG), and advanced functions as standard, such as serial bus decoding, mask limit testing, maths channels and filtering. Advanced triggers include pulse width, interval, window, window pulse width, level dropout, window dropout, runt pulse, variable hysteresis, and logic. All triggering is digital, ensuring low jitter, high accuracy and single-LSB voltage resolution. MSO models combine these triggers with edge and pattern triggering on the digital inputs.