The MS420 from Extech integrates a dual-channel oscilloscope and multimeter into a single portable instrument, tailored to both bench and field usage. With a 20 MHz bandwidth and 100 MS/s sampling rate, it captures a wide range of standard signals while its peak-detect mode (down to ~50 ns) allows for catching fast glitches.In oscilloscope mode, you’ll find functions like auto-set (which auto-adjusts range, timebase and trigger for a stable display), waveform math (add/subtract/multiply/divide channels), persistence mode, averaging, XY mode, FFT, and the ability to store/recall up to four waveform screens and setups.device is powered by a rechargeable Li-ion battery or AC adaptor, making it usable in portable scenarios. Overall, the MS420 offers good functionality for electronics engineers, technicians or hobbyists needing both oscilloscope and multimeter functionality. Features 20 MHz bandwidth with two channels, suitable for most basic electronics-signal work. 100 MS/s real-time sampling rate and ~17.5 ns rise time for decent response to signal edges. Peak Detect mode for capturing short-duration glitches (~50 ns) that might be missed by standard modes. Waveform Math functions (add, subtract, multiply, divide) for comparing channel signals. Persistence and averaging modes to help observe signal stability or dynamic variations. Store and recall up to 4 waveform screens and setups, useful when repeating tests or switching tasks. USB interface and software included for transferring waveforms/data to a PC for further analysis. Integrated multimeter functions: the unit also supports AC/DC voltage, current, resistance, capacitance, diode/continuity measurements—making it a dual-function instrument. Includes Two 1X/10X oscilloscope probes Test leads Windows XP/Vista compatible USB software and cable Capacitor measuring module Adjustment screwdriver AC adaptor/charger Hard carrying case User manual Manufacturer’s two-year limited warranty
