If you need to see a waveform before you trust it, the first question isn't which oscilloscope is best but which trade-off you can live with. In the oscilloscopes signal spectrum analyzers space, the real choices come down to bandwidth, sampling, condition, and whether you need a scope that does more than plot voltage over time. These four scopes from Tektronix, FNIRSI, and HANTEK each solve a different bench problem.
Quick take
- Tektronix TDS220: the budget pick for basic bench work.
- Tektronix TDS 380: the high-bandwidth pick for fast signals.
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Listed price comparison
| Model | Listed price | Price bar | What stands out |
|---|---|---|---|
| Tektronix TDS220 | USD 149.99 | 100 MHz, 1 GS/s, 2 channels, used | |
| Tektronix TDS 380 | USD 195.00 | 400 MHz, 2 GS/s, GPIB/RS-232 | |
| FNIRSI DPOS350P | USD 225.00 | 4-in-1 with signal generator and spectrum analyzer | |
| HANTEK DSO2D15 | USD 370.50 | 150 MHz digital storage, new in box |
Decision matrix
- If your budget is tight and you mostly need basic wave shapes, audio signals, or MCU logic, the Tektronix TDS220 is the low-cost way in.
- If you need high bandwidth, the Tektronix TDS 380 is the scope to grab.
- If you want one multifunction box that can do more than look at waveforms, the FNIRSI DPOS350P is the multifunction pick.
- If you want a clean-condition scope and are willing to pay the top price, the HANTEK DSO2D15 is the pick.
Product notes
Tektronix TDS220 100MHz 1GS/s 2-Channel Digital Real Time Oscilloscope TDS 220
At $149.99, this used Tektronix is the least expensive path into a 100 MHz digital scope. It is described as producing a clear wave on both channels when connected to a signal generator, so it is a reasonable start for audio repairs, basic logic, and power-on checks. The two channels and 1 GS/s sample rate are enough for basic wave viewing. The limitation is the condition: it is used, the BNC cable is not included, and calibration may be needed before precision work. Budget time and money for that before you depend on it.
Tektronix TDS 380 400MHz 2GS/s 2 Channel Digital Real-Time Oscilloscope Tested
This used Tektronix offers 400 MHz bandwidth and a 2 GS/s real-time sampling rate for $195.00. That puts it well ahead of the TDS220 and the HANTEK when you need to capture faster edges. The feature set is also strong for the price: autoset, automatic measurements, cursor tracking, math functions, hardcopy, and rear-panel RS-232, GPIB, and video output. The trade-off is that this is a CRT instrument with 8-bit resolution, so it will not sit as neatly on a modern bench as a flat digital storage scope. If you need speed more than style, this is the one.
4IN1 Digital Oscilloscope DPOS350P 350MHz 2CH Signal Generator Spectrum Analyzer
At $225.00, this FNIRSI is the only open-box unit here that combines a signal generator and spectrum analyzer with the oscilloscope. That 4-in-1 design is its main reason to pick it: you can generate a test signal and look at the frequency response without adding another instrument. The 7-inch 1024×600 display is a generous viewing area, and the real-time sampling rate is rated at 1GSa/s. The limitation is condition: it is new open-box, not sealed new, so you are trading factory-fresh certainty for the convenience of several tools in one box.
New In Box HANTEK DSO2D15 Digital Storage Oscilloscope 150MHz 2CH
The HANTEK DSO2D15 is the one model here that is sold new in box, and that is its main reason to be considered. At $370.50, it costs more than the other three, but you are paying for a fresh 150 MHz two-channel digital storage oscilloscope with no used-unit wear. It is a straightforward call when you want certainty for service bench work and do not want to gamble on a used CRT or an open-box multifunction unit. The limitation is simply the price: this is the highest-priced scope in the group. If new-in-box condition matters more than the lowest cost, this HANTEK earns its place.
Final recommendation by use case
- For a strict budget: Tektronix TDS220. It is the least expensive scope in this group and still covers basic bench needs. Add a BNC cable and plan for possible calibration.
- For high-frequency work without paying the top price: Tektronix TDS 380. Its bandwidth and sampling are strong for the price, and its rear-panel connections make it a capable bench partner.
- For an all-in-one bench tool: FNIRSI DPOS350P. It is the only unit here that bundles extra test functions into the same enclosure.
- For new-condition certainty: HANTEK DSO2D15. It is the one when you want a sealed unit and can accept the group's highest price.
