FNIRSI DPOX180H vs Siglent SDS2104X Plus
Head-to-head spec comparison to help you pick the right scope for your bench.
FNIRSI
$110
Siglent
$1099
Spec-by-Spec Comparison
| Spec | FNIRSI DPOX180H | Siglent SDS2104X Plus |
|---|---|---|
| Bandwidth | 180 MHz | 100 MHz |
| Sample Rate | 0.5 GSa/s | 2 GSa/s |
| Channels | 2 | 4 |
| Memory Depth | 28 Kpts | 200 Mpts |
| Display Size | 2.8" | 10.1" |
| Weight | 0.285 kg | 4.5 kg |
| Price | $110 | $1099 |
| Rating | 5.0/10 | 8.0/10 |
| Protocol Decoder | Yes | Yes |
| Function Gen | Yes | Yes |
| WiFi | No | No |
| Battery | Yes | No |
| Buy on Amazon · $110 | Buy on Amazon · $1,099 |
Pros & Cons
FNIRSI DPOX180H
Pros
- Very affordable at ~$110 for what it packs
- 180MHz bandwidth in a genuinely pocket-sized device
- Battery powered and truly portable — shirt-pocket size
- Built-in function generator and multimeter
- Protocol decoding for UART, SPI, and I2C
Cons
- 28Kpt memory depth is critically shallow — limits capture usefulness significantly
- 2.8-inch screen is very small — detailed waveform analysis is uncomfortable
- 500MSa/s sample rate is modest even for a pocket scope
- Accuracy concerns typical of FNIRSI at this price tier
- Build quality is mediocre — the housing feels flimsy
Siglent SDS2104X Plus
Pros
- 200Mpt memory depth is exceptional — capture minutes of data at full sample rate
- 10.1-inch IPS touchscreen is genuinely gorgeous to work with
- 2GSa/s sample rate handles fast signals better than 1GSa/s scopes
- Comprehensive protocol decoding including FlexRay, I2S, and MIL-STD-1553
- Built-in 25MHz AWG function generator
- Feels like a professional instrument — because it is one
Cons
- At ~$1,099, it's at the top of hobbyist budgets
- 100MHz bandwidth is surprisingly low for this price tier
- Large and heavy — needs permanent bench space
- Overkill for casual Arduino projects or simple bench work
Our Verdicts
FNIRSI DPOX180H
The FNIRSI DPOX180H is a pocket oscilloscope with surprisingly high bandwidth for the money — 180MHz in something smaller than a deck of cards is legitimately impressive. At $110, you also get protocol decoding, a function generator, and a multimeter in the same device. The hard truth is the 28Kpt memory depth and 2.8-inch screen kill its usefulness for anything beyond quick spot checks — you can glance at a signal, but capturing and analyzing a long serial transaction is off the table. The OWON HDS2202S is better in almost every meaningful way if portability is your goal, but it costs $439 versus this scope's $110. At this price, the DPOX180H is best understood as a capable probe-and-check tool, not a primary bench instrument.
Siglent SDS2104X Plus
The Siglent SDS2104X Plus is a professional-grade scope that happens to be affordable enough for serious hobbyists, and using it for a long debugging session makes the price feel justified. The 200Mpt memory depth is the headline — you can capture minutes of data at full sample rate, then scroll back and zoom into any moment without re-triggering. The 10.1-inch IPS touchscreen is excellent. The comprehensive protocol decoding (including FlexRay and I2S) makes it the right tool for serious automotive or audio embedded work. The surprise is that all this comes with only 100MHz bandwidth — you're paying for depth, features, and build quality, not raw frequency response. At $1,099, this is a serious investment. It only makes sense if you do electronics work regularly enough to amortize that cost, and if you want an instrument you genuinely won't outgrow.