Model 2601B-PULSE System SourceMeter Instrument Reference Manual Section 4: Sourcing and measuring
2601B-PULSE-901-01A April 2020 4-21
Figure 48: Connections for guarding
Noise shield
Use a noise shield (see following figure) to prevent unwanted signals from being introduced into the
test circuit. Low-level signals may benefit from effective shielding. The metal noise shield surrounds
the test circuit and should be connected to LO, as shown.
Connect the enclosure of all metal test fixtures to protective earth (safety ground). See your
specific test fixture for information. Nonconductive test fixtures must be rated to double the
maximum capability of the test equipment in the system.
Connections to LO on the 2601B-PULSE are not necessarily at 0 V. Hazardous voltages could
exist between LO and chassis ground. Make sure that high-voltage precautions are taken
throughout the test system. Alternatively, limit hazardous levels by adding external
protection to limit the voltage between LO and chassis. Failure to make sure high-voltage
precautions are used throughout the test system or a failure to limit hazardous levels could
result in severe personal injury or death from electric shock.
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