Keysight (Agilent/HP) 53132A
Universal counter, frequency range 0.1 Hz to 225 MHz, for measuring frequency, period, pulse width, rise and fall time, phase and peak voltage, frequency and time interval resolution 10 digits (500 ps), output impedance 50 ohms, LED display, connection for external reference 1, 5 and 10 MHz, IEEE and RS-232 interfaces. Universal counter 0.1 Hz - 225 MHz
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Keysight (Agilent/HP) 53132A