For example: Agilent E4440A or Anritsu 68369
Frequencym counter

Model:5326B

Manufactured by: Keysight / Agilent

Category:Frequency Time Standards

Keysight / Agilent 5326B - Frequency Time Standards

Keysight / Agilent 5326B Overview

The unit has a frequency range of DC to 50MHz (DC coupled) and 20Hz to 50MHz (AC coupled).
Features also include 1 Mohm and 50-ohm inputs, display storage, and blanking for insignificant digits in the display.
Time base is 10MHz with stability of <3x10E-07 / month.
Sensitivity is 0.1 V rms sine wave and 0.3 V p-p pulse with 8 ns minimum pulse width.
Attenuator has x10 and x100 positions.
Display is 7-digit with leading zero suppression. Built-in DVM allows setting trigger levels and allows external DC measurements from 1 µV to 1 kV DC.

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