Product Description
HP 5302A / Agilent 5302A 50MHz - Universal Counter 
The 5302A Universal Counter Module offers two input channels and it is designed to use in the 5300A Mainframe.
This unit has the following specifications:
* Channel A counter range is 10Hz to 50MHz
* Channel B counter range is 10Hz to 10MHz
* Sensitivity (min): 25 mV rms sine wave 50Hz to 1MHz, 50 mV rms sine wave 10Hz to 10MHz, 100 mV rms sine wave at 50MHz, 150 mV p-p pulse at minimum pulse width, 50 ns
* It measures period, period average, time interval, ratio, and open/close (totalizing)