3GHz Universal Counter, 10 Digits, unit with option: 030= 3GHz Channel 2 to standard 225MHz Channel 1 The Agilent (now Keysight) 53181A RF counter provides fast, precise results with the core measurements needed for RF tests. It provides the same signal processing and test automation features as the 53131A and 53132A universal counters, along with 10 digits/second resolution. The 53181A offers a single 225 MHz channel standard, and you can choose an optional second channel that measures up to 1.5 GHz, 3 GHz, 5 GHz or 12.4 GHz. Want to connect your instrument and PC? Take a look at Agilent´s (now Keysight) IntuiLink free PC connectivity software. Measurements include frequency, frequency ratio (with optional channel 2), period and peak voltage Automated limit tests and one-button measurement setups for fast, easy operation 10 digits/second resolution Built-in statistics feature lets you simultaneously measure average, min/max, and standard deviation One 225 MHz input channel, plus optional second channel up to 12.4 GHz GPIB Standard, USB optional