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53131A/132A/181A Data Sheet
Description and technical specifications for the Keysight 53131A, 53132A, and 53181A frequency counters.

Data Sheet 2011-11-08

RF & Universal Frequency Counter Comparison Guide
This technical overview provides a comparison of the 53131A, 53132A, 53181A frequency counters and their replacement, the 53200 Series RF & universal frequency counters/timers. A quick reference product replacement guide is also included.

Technical Overview 2011-04-07