I'm trying to perform some receive system fault finding, and I'd like to understand how the sig_gen extension works a bit better.
Where exactly does it inject the signal into the Kiwi ?
Is it an actual RF signal injected into the antenna port before the LPF, or is it a bit further down the chain ?
Does it actually make use of the ADC, or is it routed internally in the FGPA simulating an ADC output and therefore entirely bypassing the whole ADC stage ?
No need for a detailed reply, just a quick answer would be fine. I'm just trying to understand the basics.