Additional Features: Two 225 MHz input channels, plus optional third channel up to 12.4 GHz 10 digits per second, 500 ps time interval resolution Automated limit tests and one-button measurement setups for fast, easy operation Built-in statistics feature lets you simultaneously measure average, min/max, and standard deviation GPIB Standard The Agilent 53131A has a 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 measure up to 3 GHz, 5 GHz, or 12.4 GHz. The Agilent 53131A has the capability to do the job quickly and correctly from fast signal processing to automated limit tests.