The TDS644A 4 Channel Digitizing Oscilloscope has a real-time bandwidth of 500MHz and a sample rate of 2 GS/s. The unit has a maximum record length of 2,000 points per channel. Other features include: Waveform Math and Advanced Waveform DSP, Color VGA Display, 3.5" DOS Format Floppy Drive, RS-232, Centronics, GPIB and VGA I/O Ports.