0

Consider a continuous wave signal being displayed on a spectrum analyzer at f=5GHz. It's a single peak. When I put marker on the peak it shows me the peak measured power. Now when I decrease the span of the instrument from 10MHz to, lets say, 1MHz, the measured peak power is increased. Can someone explain why this is so?

I am sure it has something to do with the RBW of the instrument. Also if the power changes with span, if I just need to measure the peak power should I be using zero span mode?

JRE
  • 67,678
  • 8
  • 104
  • 179
hacker804
  • 602
  • 5
  • 19
  • [This](https://electronics.stackexchange.com/a/150609/9612) looks like it might be related; can you take a brief look? (not marking as a duplicate because I don't know enough about spectrum analyzers to know whether it is in fact a dupe) – nanofarad Dec 29 '20 at 15:53
  • By how much did the measured power increase when you lowered the resolution bandwidth to 1 MHz? – Andy aka Dec 29 '20 at 16:11
  • @Andyaka I do not remember exactly but it was something like 0.6dBm – hacker804 Dec 29 '20 at 16:29

0 Answers0