The TDS540A Digitizing Oscilloscope is excellent for circuit design, R&D, manufacturing test, and telecommunication applications. " Bandwidth: 500MHz " Samplers: 4 " Channels: 4 " Sample Rate: 1 GS/s (single channel); 500 MS/s (dual channels); 250 MS/s (four channels) " Record Length: 500 to 50,000 points Features: Bandwidth: 500 MHz Sample Rate: 1 GS/s per channel Channels: 4 Record Length: Up to 50,000 points per channel Display: Digital monochrome CRT Vertical Sensitivity: 1 mV/div to 10 V/div Input Impedance: 1 M? or 50 ? switchable Time Base Range: 500 ps/div to 10 s/div Triggering: Advanced options including edge, video, pulse width, and logic triggers