Meet
the
HP
8904A
1-17
The floating ground configuration
(LED
on) allows the HP
8904A’s
circuitry to be referenced
to
an external ground rather than to chassis
ground. This configuration eliminates ground loops between the
HP
8904A
and the input device. Figure
1-9
shows
two
methods for
connecting the floating Output Port to an input device.
Caution
The voltage differential between the
HP
8904A’s
floating ground level
and
its
chassis ground level should not exceed
a
maximum
of
10
Vpk.
a. Using
two
BNC
cables provides maximum shielding where
High and Low inputs are also available.
b. Using an adapter allows the High and Low Output
Ports
to
be connected to a single input port.
Figure
7
-9.
Cable Connections for the Floating Ground Output Configuration.
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