FNIRSI DST-210 3-in-1 handheld digital multimeter oscilloscope signal generator

The FNIRSI DST-210 is a handheld digital multimeter that combines three instruments in one device: a True RMS multimeter, a handheld oscilloscope with 10 MHz bandwidth and 48 MSa/s sampling rate, and a DDS signal generator (SigGen). It suits diagnostics, servicing and fieldwork, for example when checking power supplies, audio circuits, PWM signals or automotive electronics.

The oscilloscope displays waveforms in real time, with trigger functions, Auto, Normal and Single modes, and an Infinite Afterglow display that makes brief glitches, peaks and jitter visible. The signal generator outputs 13 waveform types from 0 to 50 kHz, with 0.1 to 3.0 V amplitude and an adjustable duty cycle, so amplifiers and filters can be tested without extra equipment.

Measurement functions cover AC and DC voltage and current, resistance, capacitance, frequency, temperature, diodes and continuity. Curve Mode and data logging help track fluctuations over time, and Waveform Hold freezes a signal for closer analysis. The 2.8-inch TFT display offers light and dark themes and is powered by a 3000 mAh battery that charges via USB-C.