Hello,
This is has refernce to MXA (N9020A) CCDF measurement.
In CCDF measurement, what is the siginficance of Info BW?. Is is related to the RBW of the MXA? I read about an option to increase this infoBW or signal analysis BW to 40 MHz from 25 MHz.
Suppose I have 4 carrier WCDMA. spaced 5MHz apart. This signal will have 20 Mhz BW (BW od 5 MHz for each WCDMA). I should be able to analyze CCDF etc using 25MHz InfoBW, right?
This is has refernce to MXA (N9020A) CCDF measurement.
In CCDF measurement, what is the siginficance of Info BW?. Is is related to the RBW of the MXA? I read about an option to increase this infoBW or signal analysis BW to 40 MHz from 25 MHz.
Suppose I have 4 carrier WCDMA. spaced 5MHz apart. This signal will have 20 Mhz BW (BW od 5 MHz for each WCDMA). I should be able to analyze CCDF etc using 25MHz InfoBW, right?
In CCDF, the info BW is the BW used by the analyzer to generate the CCDF. The preset for the info BW is 5 MHz, but it can be modified by pressing the BW hard key in the CCDF measurement mode.
Therefore, given the entire 20 MHz W-CDMA signal that you have suggested, you would want to change the info BW to 20 MHz in order to obtain power level data for the entire signal. If you are interested in the power measurement for a single carrier with BW of 5 MHz, you would set the info BW to 5 MHz.
The limit of the info BW is based upon the analysis BW of the analyzer that you are using. If you have an analyzer with 25 MHz of analysis BW, the hard cap for the info BW will be limited to 25 MHz (and this would indeed be sufficient for the measurement that you have suggested).
Purchasing option B40 will allow you to increase the analysis bandwidth limit to 40 MHz, which will increase the hard cap for the info BW to 40 MHz.
Also, resolution BW is related to the BW of the IF filter, and not to the info BW.
Thanks, and Best Regards,