Tektronix TDS 640 A Digital Storage Oscilloscope features : 500 MHz Bandwidth 2 GS/s Sample Rates 4 Channels 8-Bit Vertical Resolution Greater than 11-Bits with Averaging Record Length to 15,000 Points 1 mV/div to 10 V/div Sensitivity 1.5% Vertical Accuracy Waveform Math and Advanced Waveform DSP Fully Automated Measurement System Waveform Pass/Fail Template Testing Color VGA Display 3.5 in. DOS Format Floppy Drive RS-232, Centronics, GPIB and VGA I/O Ports