Wow! You have gone the extra Mile/KM! You see, what you have done is what I couldn't do because my Feeltech was never sent after ordering back in April, 2 times now!
BTW the 3rd one is sitting in an Amazon parcel locker as we speak for pickup in the morning. Dishonest or downright nasty sellers who steal your money for months and deliver nothing.
Well that's in another post. I paid the extra $$ and it's here in less than a week.
The signal sources I were using were 2 old Wavetek 148 20MHz and 166 50Mhz function generators, that were unstable, bulky and old. I then went to a combination of function generators and oscillator modules. I knocked the oscillator modules down with pi attenuators to the right levels of course.
If I only had what needed from the beginning, it certainly would have been as easy as you appear to make it.
I appreciate your photos and setup. I don't have my HP spectrum analyser any more as I sold it for living expenses a few years back. Things are better now. Hopefully in the future a Rigol or other will fall into my lap.
You have done a most excellent job in explaining the process without anything blowing up.
I thank you. You have given me the confidence to duplicate this experiment tomorrow if the Feeltech FY6900 #3 finally exists and functions properly. Stay tuned to this frequency....
Now, it's time for bed.