jks

The "git pull" is a little redundant. But it won't hurt anything. You must login to the Beagle as user "root" and not "debian". Contents of "up" file, in part:

make stop
git clean -fd
git checkout .
git pull -v
make clean
make
make install
make start

I've only had one other complaint and a manual rebuild (I think) cured whatever the problem was.
Hundreds of other Kiwis have updated just fine.

I need more information. Do you know how to login to your Kiwi using ssh (Linux/Mac) or PuTTY (Windows)? If so, can you try these commands and let me know what error messages occur after the build starts:

cdp
mst (stops Kiwi server running in background)
k (runs server in foreground)

If this doesn't work type "up" to do a manual build and see if that clears it up.

Yes, but a couple things about buying BBG/BBB from Mouser/DigiKey. Because of the encryption content of the TI chip used on the Beagle Mouser will require you to fill out some paperwork saying you are the end-user and/or agree not to divert the device. Or when you actually go to order it will say "not available in your country". This is of course insane given that you can buy them all day long from Seeed in China who will ship anywhere.

Second, if your order total is >= US $50 Mouser and DigiKey will ship *free* using FedEx or UPS. I get stuff in 3-4 days this way (assuming below the duty threshold). So add a few things to your order to get over $50.

Extremely rushed, but v1.230 has a graph of the Goertzel filter output along with the current threshold value (which can also be adjusted). Plotted in dB because it was easier.

@Phil Mouse-based adjustments of the passband already exist: http://kiwisdr.com/quickstart/index.html#id-user-pbt

I personally find it easier to use the new keyboard interface. If I know I want the pbc to be 425 Hz I type ":425" (since the frequency entry box is always selected by default) and I'm done. No tedious shift-dragging the yellow passband image around to get it exactly to 425.