Keysight U1610A Guia Del Usuario página 33

1 Getting Started
Independently Isolated Scope Input Channels
There are two main categories of signal sources:
– Earth ground referenced signal—the voltage signals are referenced to a system
– Floating ground referenced signal—a floating signal in which the voltage signal
Floating ground
referenced signal
Floating ground
referenced signal
Figure 1-5
When measuring floating signals with instruments that have multiple inputs,
unwanted ground loops may occur. These ground loops can induce measurement
errors and cause electrical shock or power surges. Ground loop occurs between
the negative terminals of two inputs as shown in
Instruments with channel-to-channel isolation can be used to eliminate the
ground loops. Isolated channels separate the two signal path effectively from each
other by eliminating any potential common circuit path between the two inputs.
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ground, such as earth ground.
is not referenced to earth ground.
Floating ground
referenced signal
Floating ground reference signal and earth ground
reference signal
Earth ground
referenced signal
Earth ground
referenced signal
Figure 1-6.
Keysight U1610/20A User's Guide
Earth ground
referenced signal