Hi Joerg, well done on the build.
The tracking generator is in the code.? There is a bug in version 0.11 that is fixed in version 0.12 which is close to release, but I don't think that is the problem here.
In the tracking menu there is an option for offset (there is also a console command) to offset the tracking generator IF from the SA IF.? If both IF are the same then the signal from the TG IF gets through into the SA receiver, which is what you are seeing, I think.??
I have a bodged build, not the VK3PE boards, but with the offset at zero I get similar results to you.? Set the offset to say -800000 and you should see a huge improvement.? You can play around and see what works best for you.? I have my SA IF set quite high (434.1MHz) to reduce the LO breakthrough at low frequencies, if you stay with an IF in the middle of the SAW filter range (433.92MHz) then something like -500,000 may work out better.? Positive values are also OK.? If you go too far then you will fall outside the range of the SAW filter on the TG board (if fitted), though this could possibly be to some advantage in reducing the signal level from the TG which really needs some attenuation to avoid overloading the receiver.
simpleSA version 0.12 will include support for an encoder to aid navigation and some additional marker features.
Can you confirm what version of the TFT-eSPI library you have installed?? The gain trace axis scale comes out green on my version, though I don't have the latest version of TFT-eSPI installed yet.
73
Dave M0WID
