HP 3457A

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**Hewlett-Packard 3457A**

Status	supported
Source code	hp-3457a
Counts	30300000
IEC 61010-1	450V p-p max
Connectivity	GPIB
Measurements	voltage, current, resistance, frequency, period
Features	autorange, readings memory, four-wire resistance
Website	keysight.com

The Hewlett-Packard 3457A is a 7.5 digits (30300000 counts) bench digital multimeter with GPIB connectivity.

Hardware

Precision Subsurface Zener Voltage reference: Linear Technology LM399
Analog board microprocessor: Intel 8051
Digital board microprocessor: Motorola 6800

Resources

EEVBlog teardown of the 3457A

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