Mixed Signal Oscilloscope 1GHz 4GS/s, 4 analog + 16 digital channels 1 GHz bandwidth; 4 GSa/s sample rate 4 analog plus 16 digital channels Standard 8 Mpts MegaZoom III deep memory Automatic Search and Navigate Engineered for the best signal visibility 12.1" XGA display with 256 levels of intensity shows subtle signal detail Industry's-fastest uncompromised update rate of up to 100,000 waveforms/sec displays infrequent events 3x USB