Agilent / HP 53131A 225 MHz Universal Frequency Counter/Timer, in use in an electronics lab until recently. In good condition, works perfectly. Multiple units available.

The two-channel 53131A counter offers 10 digits per second of frequency/period resolution and a bandwidth of 225 MHz. Time interval resolution is specified at 500 ps. Standard measurements include frequency, period, ratio, time interval, pulse width, rise/fall time, phase angle, duty cycle, totalize, and peak voltage.

Power cord or test leads are not included. 

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