Excellent! Real good resolution... I used your idea and found two ways I could use to combine the I and Q so that I could see a single gain figure and its slope across the spectrum; and the difference between the two in a single phase angle relationship, one subtracted from the other. +/-
The resolution was way better. It lead me to go backwards in my 455 kHz I - Q circuit and improve the match to the op amp (R4 and R5 changed now to 17k each). I used a simple test fixture for this but had to remove it and restore the I - Q as it was to look at them individually again. But I left in the improvements to the op amp made with the test fixture. It was basically an improvement to the match between the transformer and op amp. And made fine changes in terms of 10ths of a degree resolution in the phase angle. It was a good suggestion. And it appears it might give me insight into making a better determination of the final load at the end of the circuit chain? I will try that idea here soon. I think it will give me more insight into the end terminating loads. Kind of fine tune the load. I will upload the test fixtures as soon as I have some of the previous models checked with it. Dan
