3M ScanEM-QC CTK019, Руководство пользователя

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There are just too many variables to make the numerical results of near-
field tests trustworthy. If the readings taken with a near-field probe cannot
be trusted, what are the benefits of using it? The answer is simple: a near-
field test, regardless of the test equipment used, provides only relative
results. The near-field test can show where the emission is stronger and
where it is weaker, and what type of field is dominant. The 3M
™
ScanEM-
QC Electromagnetic Near-Field Probes can locate the exact source of the
offending radiation, saving days or even weeks and a substantial amount
of money in unnecessary trial-and-error testing in an agency-certified
laboratory. The ScanEM-QC Probes have a high detection capability, and
depending on circumstances, can narrow problem areas down to a single
seam of enclosure or specific cable.
ESD Primer
Electrostatic discharge is an electromagnetic phenomenon. Electrostatic
discharges, or ESD events, create very electromagnetic waves of short
duration (as short as 1 nanosecond). Due to a wide frequency range of
3M
™
ScanEM-QC probes, it is possible to observe ESD events using a high-
speed oscilloscope. Connect the output of the ScanEM-QC Probe to an
oscilloscope, set the Level dial of the ScanEM-QC Probe to zero and press
Operate button. The ScanEM-QC Probe is now ready to work as an active
antenna for an oscilloscope. The 3M
™
ScanEM-EQC Probe is helpful for
measurements of radiated field created by ESD Events. The 3M
™
ScanEM-
HQC Probe works well for observing ESD Events in cables and wires, as
well as in ground planes.
ESD Events can be extremely harmful for electronic equipment,
semiconductors, disc drive heads, etc. Proper observation of ESD Events
provides the possibility of controlling them.