The Agilent 53131A universal counter has the capability to do the job quickly and correctly from fast signal processing to automated limit tests. The Agilent 53131A has frequency resolution of 10 digits per second, 500 ps time interval resolution and a complete set of test and analysis features. The unit comes with two 225 MHz channels, and you can choose an optional third channel that measures up to 3 GHz, 5 GHz, or 12.4 GHz.