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Electromagnetic Interference (EMI) Measurements – Option 361
EMI Measurements Mode Settings
How to set Frequency Range and Frequency Context
For EMI mode, you are able to change the center, frequency span, start, and
stop frequencies or select a specific CISPR band. See also,
(International Special Committee on Radio Interference) Control" on
page
— Press Freq/Dist.
— Then choose from the following:
In the CISPR Band Scan measurement, the default span is the full range of
the particular CISPR band selected. The Span can be changed, to examine
part of the CISPR band in more detail, but the Span can never exceed the
full width of the CISPR band, and never be less than the minimum span
which CISPR Zoom Scan achieves. The Full Span button causes a CISPR
Band Scan to return to the default full range of the particular CISPR band.
Learn more, see
Interference) Control" on page
Keysight N9915-90020 User's Guide
331.
Center
Freq Span
—
and
of entering frequency range. Enter the frequency of interest. The
Center frequency is at the exact center of the X-axis. The Frequency
Span places half of the frequency range on either side of center.
When the Center and Frequency Span values are entered, then the
X-axis annotation on the screen shows the Center and Span
frequencies.
"CISPR (International Special Committee on Radio
Start
Stop
—
and
frequencies. Start is the beginning of the X-axis and
Stop is the end of the X-axis. When the Start and Stop frequencies
are entered, then the X-axis annotation on the screen shows the Start
and Stop frequencies. Start and Stop are not active choices for
CISPR Zero Scan (i.e., for CISPR Band Scan and CISPR Zero Scan
ZSpan
in the lower right of the display indicates you are at the span
limit).
Zero/Last Span
—
For EMI mode, which defaults to log sweep, this
softkey toggles between log (FFT) – previous screen and start/stop
frequencies and linear (Time) – in zero Span.
More
— Optionally, press
——Freq Annotation
AutoSelect
setting (Center Span or Start Stop).
CenterSpan
StartStop
displayed.
frequencies. This is the most common method
331.
then:
and one of the following:
(Default) – The FieldFox selects a frequency annotation
-The center frequency and span are displayed.
- The start and stop frequencies of the frequency span are
"CISPR
329
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