Hi All,

Stated in PSA E4440A datasheet, the W-CDMA ACP dynamic range (typical) is around -75dB, but it doesn't stated under what condition this value was produced. Is there any way/method to prove or verify the W-CDMA ACLR dynamic range of my PSA? Is directly connect to the signal source (E4438C w W-CDMA signal) will do the job?

As far as I understand, the dynamic range normally is a positive numbers (range) but not sure why is the datasheet is "-ve". i.e -75dB.

Here is the url for the datasheet.

http://cp.literature.agilent.com/litweb ... -1284E.pdf

Thanks,

Syuhaimi

Stated in PSA E4440A datasheet, the W-CDMA ACP dynamic range (typical) is around -75dB, but it doesn't stated under what condition this value was produced. Is there any way/method to prove or verify the W-CDMA ACLR dynamic range of my PSA? Is directly connect to the signal source (E4438C w W-CDMA signal) will do the job?

As far as I understand, the dynamic range normally is a positive numbers (range) but not sure why is the datasheet is "-ve". i.e -75dB.

Here is the url for the datasheet.

http://cp.literature.agilent.com/litweb ... -1284E.pdf

Thanks,

Syuhaimi

I don't know what measurement method they use to come up with the number for the brochures. But typically, the sources will have worse distortion than the spectrum analyzer. One popular method is to put a stopband filter in the adjacent channel on the output of the source. Of course, this filter will limit the frequency at which you can do the test.

A simpler method is to distort the PSA to a level well above the source's distortion, step the PSA attenuator to make sure you are in the 3:1 slope range, and extrapolate using the noise slope and phase noise floor to calculate a dynamic range. See page 28 of the application note. Also see pages 36-37 for how noise subtraction can improve this range.

Usually, negative numbers are used with dB units and positive numbers are used with dBc units. But this is often abused.