Reply To: SA44B noise measurement

Hey Justin,
OK, I am advancing in understanding of what happens there and it helps me to understand why I got results as I got..
Some more, please:
1. What IF/s frequency is/are used for spans of more than 200 KHz? Is it/them remain the same for spans up to 200 MHz?
2. What is the reason to select for spans below 200 KHz the better (lower) measured value between results with two different IF-s, why lower reading value is declared to be more truthful, what philosophy stands behind this approach?
Thank you