On Sat, Nov 26, 2022 at 12:49 PM, John Cunliffe W7ZQ wrote:
... Thank you it is great. Being the nerd I am I checked the cal output for oscillator feed-trough. It seems to be at -45 to -50dbm level, perfect. That is a level that can easy be boosted with a couple of MMIC to be used for a tracking generator for the 1-800Mhz band. I probably will build one just for grins lol. I don't need it, I have build one for my 8ghz spectrum analyzer that works very well. But it is the challenge to build it that I enjoy.
?The LO output (977 MHz??) is directly available at the CAL output at a much higher level by selecting CONFIG->MORE->LO OUTPUT.? The leakage you observed limits the dynamic range of tracking generator measurements to less than the tinySA Ultra is capable off, and less than can be achieved with a nanoVNA measuring S21.
Herb
