ADVANCED OPERATION
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9. Press Scale Type[F5] to set the frequency scale to
logarithmic or linear. Logarithmic frequency
scaling is often used for compliance testing.
10. If any test fails, use the EMI M, EMI E or
Voltage Probes functions to find the cause(s) of
the test failure. Rectify the causes and then re-
test.
Near Field Testing ~ EMI M Probe
The EMI M Probe function can be used to
narrow down sources of strong magnetic fields
before making a radiated compliance test as
this function allows you to simulate the
radiated emissions from 3 or 10 meters when
using any of the GW Instek EMI-M probes.
Magnetic field sources are characterized by
high current, low voltage sources, such as PCB
traces with high current.
The 3m and 10m simulated results are based on
the probe factors of the GW Instek EMI M probe
antennas, and as such can only be used with a GW
Instek M probe.
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