The Tektronix TDS684A is a top class four channel Digital Oscilloscope / Colour DSO Features Bandwidth: 1 GHz Sampling rate: 5 GSa/s Channels: 4 Advanced Waveform DSP/Math 7 inch colour display Time base system Time base: Main and delayed Time/div Range: 200 ps/div to 10 s/div Vertical system Vertical resolution: 8 bits ( < 11 bits with averaging) Vertical sensitivity: 1 mV/div to 10 V/div Maximum input voltage: ± 400 V