Digilent Analog Discovery 3 vs Siglent SDS814X HD
Head-to-head spec comparison to help you pick the right scope for your bench.
Digilent
$379
Siglent
$587
Spec-by-Spec Comparison
| Spec | Digilent Analog Discovery 3 | Siglent SDS814X HD |
|---|---|---|
| Bandwidth | 50 MHz | 100 MHz |
| Sample Rate | 0.125 GSa/s | 2 GSa/s |
| Channels | 2 | 4 |
| Memory Depth | 32 Kpts | 50 Mpts |
| Display Size | N/A | 7" |
| Weight | 0.15 kg | 2.6 kg |
| Price | $379 | $587 |
| Rating | 7.5/10 | 7.5/10 |
| Protocol Decoder | Yes | Yes |
| Function Gen | Yes | No |
| WiFi | No | Yes |
| Battery | No | No |
| Buy on Amazon · $379 | Buy on Amazon · $587 |
Pros & Cons
Digilent Analog Discovery 3
Pros
- 14 instruments in one: scope, logic analyzer, protocol analyzer, function gen, power supplies, network analyzer, and more
- WaveForms software is excellent, free, and regularly updated
- 16-channel logic analyzer is invaluable for digital protocol debugging
- Fits in a pocket — genuinely portable full lab capability
- Great for students and educators who need multiple instrument types
Cons
- Only 125MSa/s — significantly lower than benchtop scopes
- Requires a PC to operate — no standalone use in the field
- 2 analog channels with limited bandwidth compared to benchtop alternatives
- 32Kpt analog memory depth is very shallow for longer captures
- Not a replacement for a dedicated scope when analog performance matters
Siglent SDS814X HD
Pros
- 12-bit ADC with Siglent's clean analog front-end — LeCroy lineage in the signal path
- 100MHz bandwidth with the option to unlock higher via software license
- 2GSa/s sample rate outperforms the competing Rigol DHO814's 1.25GSa/s
- 50Mpt memory depth for extended capture sessions
- CAN and LIN decoding included free — Siglent's consistent protocol advantage
- 16 digital channels available with optional logic probe for mixed-signal work
Cons
- At ~$587, you're paying a premium over the DHO924S ($449) which has 250MHz
- Siglent's smaller community means fewer tutorials and troubleshooting resources
- No built-in function generator without the optional add-on
- The SDS804X HD at $438 offers 70MHz (unlockable to 200MHz) for $150 less
Our Verdicts
Digilent Analog Discovery 3
The Digilent Analog Discovery 3 isn't really an oscilloscope — it's a multi-instrument lab that happens to include a 2-channel oscilloscope alongside 13 other tools. The 16-channel logic analyzer is its killer feature for embedded work: you can monitor SPI, I2C, GPIO pins, and PWM outputs simultaneously, something a 4-channel scope simply cannot do. WaveForms software is genuinely excellent — one of the best oscilloscope software experiences on any platform. As a pure oscilloscope, the 125MSa/s sample rate and 32Kpt memory are real limitations that you'll notice on any non-trivial analog signal. This is the right tool if you need a logic analyzer AND a scope AND a function generator and can only buy one device — especially for embedded development and student labs. If you primarily need to measure analog signals or capture long waveforms, a dedicated benchtop scope will serve you better.
Siglent SDS814X HD
The Siglent SDS814X HD steps up to 100MHz from the SDS804X HD's 70MHz, keeping the same excellent 12-bit ADC, 2GSa/s sample rate, and 50Mpt memory. It competes directly with the Rigol DHO814 at a similar price point, and wins on sample rate and memory depth. The free CAN/LIN decoding is Siglent's consistent advantage over Rigol for automotive work. At ~$587 though, the value proposition gets complicated — the DHO924S offers 250MHz and a function generator for $449, and the SDS804X HD below it at $438 can be unlocked to 200MHz. The SDS814X HD makes the most sense if you need that clean 12-bit Siglent ADC at 100MHz and want CAN/LIN decoding without additional license fees, particularly for automotive or precision analog work.