Operating basics
AFG31000 Series Arbitrary Function Generator Service Manual
15
Floating ground
Because the common ground (input and output channel common) of the AFG31000 Series is
electrically isolated from the chassis ground (the instrument chassis and ground line of the ac
connector), you can make a floating connection between the instrument and other equipment.
All the signal output connectors are connected to the common ground, and the remote interface
connector is connected to the chassis ground.
WARNING. To avoid personal injury due to electric shock, use this product so that the sum of the
floating voltage and the output voltage of the instrument does not exceed 42 V
pk
. Do not touch the
center of the BNC connector while the equipment and instrument are in use.
CAUTION. The maximum rated voltage between the chassis ground and common ground is 42 V
pp
(dc + peak ac). When the potential voltage between the chassis ground and common ground goes
over 42 V
pp
, the internal protective circuit is activated to protect the circuits. However, voltages
continuously exceeding 42 V
pp
may cause the internal circuits in the instrument to be damaged.
When a potential voltage exists between the chassis ground and common ground, a short circuit
from output to ground causes the instrument internal fuse to open and the output is stopped. If the
fuse opens, you need to contact your local Tektronix Service Support. When a potential voltage
exists between the common ground and chassis ground, short-circuiting between them may lead to
excessive current flow and the internal or external circuits may be damaged.
Figure 2: AFG31000 Series floating ground
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