Engineering-style comparison of the two—useful if you’re deciding for SDR work like interferometry or radio astronomy.
Compared devices
Key specifications comparison
| Feature | ||
|---|---|---|
| Frequency range | 24–1700 MHz native | 24–1800 MHz (similar frontend) |
| ADC | 12-bit @ 20 MSPS | 12-bit @ 20 MSPS |
| Effective resolution | ~10.4 ENOB (up to ~16-bit via oversampling) | Same architecture (similar ENOB) |
| Max bandwidth (IQ) | 10 MHz | 6 MHz (USB bandwidth limited) |
| Noise figure | ~3.5 dB | Similar (same tuner) |
| RF frontend | Tracking filters, +35 dBm IIP3 | Same RF chip, slightly simplified layout |
| Clocking | External clock input (10–100 MHz) | ❌ No external clock input |
| Bias-T | Yes (software switchable) | Yes |
| Connectors | SMA + extra I/O, GPIO, ADC inputs | Single SMA only |
| Form factor | Small box (~65 g) | USB stick (ultra-compact) |
| Power | ~340 mA via USB | Lower (~200–250 mA typical) |
| Special features | GPIO, clock outputs, expansion ports | Minimal hardware (plug-and-play only) |
Practical differences (what actually matters)
1. Bandwidth
- R2: Full 10 MHz IQ → better for wideband captures, trunking, interferometry baselines
- Mini: ~6 MHz → still good, but noticeably narrower
👉 For your interferometry work: R2 wins.
2. Clocking / coherence
- R2: External clock input → phase-coherent arrays possible
- Mini: No clock input
👉 This is the deciding factor for multi-receiver setups.
3. RF performance
- Surprisingly similar:
- Same tuner family (R820T2/R860)
- Same ADC architecture
- R2 may have slightly better shielding and dynamic range in practice.
4. Expandability
- R2: GPIO, sync clocks, ADC inputs → experimental setups
- Mini: essentially none
5. Portability
- Mini: wins easily (true USB dongle)
- R2: still small, but more “lab instrument”
Bottom line
- Choose Airspy R2 if:
- You need coherent receivers / interferometry
- You want maximum bandwidth (10 MHz)
- You care about clock discipline and expandability
- Choose Airspy Mini if:
- You want portable, cheap, simple SDR
- You don’t need external clocking
- 6 MHz bandwidth is enough