The frequency resolution of a conventional spectrum analyser is defined by the chosen RBW (resolution bandwidth) filter. Because of the limited number of data points that can be collected and displayed, a high resolution view of a signal can only be achieved over a narrow frequency span.
For some applications it is desirable to observe and record frequencies and levels to high resolution over a wide span. This is outside of the capability of a conventional swept spectrum analyser.
However, in scan mode a narrow RBW can be set whilst retaining a wide span because all data points (up to 210,000) are written to a file. When the scan is completed a compressed version of the data is displayed with pan and zoom controls enabling any portion of the data to be observed in detail.
Large numbers of scan files can be saved to the internal memory and exported as CSV data for use with PSA-Manager software or application specific third party software.
The Aim-TTi PSA Series 5 includes the 3.6 GHz PSA3605 and the 6 GHz PSA6005. These analysers are truly handheld and weigh less than 600 grams.