The Instek GDS-3504, 500MHz , 4 Ch Digital Storage Oscilloscope (DSO) has been added to the series to expand its performance coverage with a higher bandwidth and a higher sampling rate per channel. While retaining all the features of the Instek GDS 3000 Series family, the GDS 3504 with 4 channel inputs offer enhanced bandwidth and sampling rate, both carrying a high performance of 500MHz bandwidth, and 4GSa/s sampling (2GSa/s sampling per channel).The extension of bandwidth to 500MHz and sampling rate to 2GSa/s per channel allows the new DSOs to better fit applications that require higher speed and higher time resolution waveform analysis. The Visual Persistence Oscilloscope (VPO) feature of the Instek 3504 500MHz digital storage oscilloscope that enables the GDS-3000 series to acquire less-frequently-occurred signals now displays more value in capturing higher speed spike or glitch signals over a higher bandwidth testing platform.