Three things this time: the Airspy R2 is supported natively, sdrtop now runs on a Mac, and Wi-Fi has a new view called Airtime.
Let's start in with the Airspy R2. All three Airspy and SDRplay radios are here at last, and I've opened the first one up and taken it out of the box: the R2. sdrtop now drives it directly, along with the HackRF and the RTL-SDR. I've measured its gain stages out on the bench, rather than read the spec sheet. The gain knob tracks the Radio's Linearity and Sensitivity curves, giving a single knob to control all three stages, as the R2 is supposed to be used.
The bench also had a surprise. The R2's tuner begins clipping the signal before the converter, so the clip counter could be reading zero while the signal was being clipped. sdrtop now knows where that limit is and warns you before you reach it.
The Mac. That began with a problem: an RTL-SDR that refused to work with macOS. Makes sense: no one had ever tried. I don't have a Mac, so GitHub's Apple Silicon machines became mine, and all development is now done and tested there as well. This release includes builds for Apple Silicon and Intel Macs, and the one line installer works there too.
Airtime visualizes one Wi-Fi channel, second by second, and what portion of it was used by what. The result is often quite comical: hundreds of modern fast frames get barely noticeable, while one old-school 802.11b beacon swallows a good chunk of airtime.
Tip
Airtime requires a radio capable of 20 Msps, such as a HackRF.
The other two, the SDRplay RSP1B and the Airspy HF+ Discovery, are next in line, one after the other.
Full Changelog: v0.6.8...v0.6.9