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About spectrum analyzer E4440 sweep trace point number

Question asked by wangyiliu99 on Apr 10, 2011
Latest reply on Apr 12, 2011 by wangyiliu99
Hi, everyone,

I am now using the PSA series E4440, for the sweep trace points range, it is 101 to 8192.
It is clear that with more points, the spectrum can be displayed with better resolution, meanwhile,
if the trace is saved, more points one would be greater in saved file size.

For the same signal measurement, changing the number of trace points would not affect the sweep time
(at least in my measurement). I am asking, is there any rule of thumb in determining the optimum
number of trace points for the measurement? Is it simply the greater the better, any trade-offs in measurement?

Your help is greatly appreciated!