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!
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!
Changing the number of points has several effects on the analyzer. Since markers are read at the point location, the marker reading may change. All trace data for the active trace is cleared.
NOTE By selecting a number of sweep points greater than 601, you are optimizing frequency resolution and accuracy while accepting a reduced measurement speed. In addition to sweep points, the span, resolution bandwidth, video bandwidth, average detection and center frequency will also affect measurement speed.
This function is coupled with the span setting. Increasing the span can change the number of sweep points. In order to maintain accurate measurements, the number of sweep points is increased if required to keep the width of each sweep point at most 150 MHz.