What Reviewers Are Saying
The ZT-703S has earned rare praise from Elektor Magazine — one of the most respected independent electronics publications in the world — for its oscilloscope performance and multimeter accuracy that exceeded rated specifications. This isn’t a “good for the price” compromise; it’s a legitimately capable instrument that happens to cost under $100.
Dual-Channel Oscilloscope with Selectable Sampling Rate
Two BNC inputs let you simultaneously capture and compare signals — essential for analyzing filter behavior, timing relationships, clock-to-data jitter, and differential measurements. Bump the run mode from Normal (200MSa/s) to High (280MSa/s) when you need to push toward the 50MHz bandwidth ceiling. Persistence Mode lets you overlay waveforms over time to catch intermittent faults that a single-shot capture would miss.
The Multimeter That Outperforms Its Spec Sheet
25,000 counts and 0.05% basic accuracy puts the ZT-703S in the same tier as dedicated DMMs costing significantly more. Voltage, current, resistance (to 250MΩ), capacitance (to 100mF), frequency, diode, and continuity — all autoranging, all with the safety of internally fused inputs with user-replaceable fuses.
Built for Real-World Use
The rubberized housing absorbs drops and vibration. Standard BNC oscilloscope connectors (not proprietary) mean you can use any probes you already own. USB-C handles both charging and PC connectivity for firmware updates and waveform screenshot export. The included carrying case keeps everything organized in the field.
Honest Note on the Signal Generator
The generator covers sine, triangle, pulse, and sawtooth waveforms to 5kHz in the main menu, with extended frequency access (up to 344kHz sine, 500kHz square) via the secondary settings menu. Firmware updates continue to improve functionality. If a high-frequency AWG is your primary need, consider pairing this with a dedicated generator — but for calibration signals and circuit stimulus in everyday work, it gets the job done.
Focus Keyphrase: dual channel handheld oscilloscope multimeter signal generator
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