Keysight Technologies C Series - Page 339

Keysight N9915-90020 User’s Guide 339
Electromagnetic Interference (EMI) Measurements – Option 361
EMI Measurements Mode Settings
How to set the EMI Traces
When the EMI measurement type is set to CISPR Band Scan or CISPR Zoom
Scan Trace 1, Trace 2, Trace 3 have default values assigned. The trace can be
disabled under the Measure 1
(toggle to enable/disable) or the Trace 6
hardkeys or re-assigned to measure a different value on the trace by using the
Trace 6
hardkey (e.g., you can re-assign trace 1 to measure Quasi-peak or EMI
averaging). These detector choices are inactive when the EMI measurement
type is set to, Fast SA Scan or APD Statistics. (i.e., APD statistics does not uses
detection; it uses inputs. Refer to “Measure 1 Hardkey – EMI ’Convenience’
Softkeys” on page 339
and “Input – (Trace Input for APD Measurements)” on
page 341).
Learn more, see “How to Set the EMI Measurement Settings (Fast SA Scan,
CISPR Band Scan, CISPR Zoom Scan, and APD Statistics)” on page 331.
Measure 1 Hardkey – EMI ’Convenience’ Softkeys
—Press Measure 1 then choose:
— PosPeak T1 – Enable/Disable trace 1 to display positive peak data
and retains the peak value of a signal, indicating the worst-case
summary data (Default = on). P annotation is displayed. This softkey
is inactive, when APD Statics is ON.
— QuasiPeak T2 – Enable/Disable trace 2 to display quasi-Peak data
that weighs each component based on its repetition rate: the faster
repetition rate, the higher the weight given to that component
(Default = on). Q annotation is displayed. This softkey is inactive,
when APD Statics is ON and or CISPR Band E is selected.
—
EMIAverage T3 – Enable/Disable trace 3 to display EMI average data
displays the average amplitude of each signal component across its
period (Default = on). A annotation is displayed. This softkey is
inactive, when APD Statics is ON.
These softkeys are inactive when the EMI measurement choices are Fast
SA Scan or APD Statistics. Learn more, see
“Input – (Trace Input for APD
Measurements)” on page 341
.
IMPORTANT!
When you press the Measure 1 hardkey a softkey menu is displayed and
has, as a convenience, fixed values for Trace 1 (PosPeak T1), Trace 2
(QuasiPeak T2), Trace 3 (EMIAverage T3) assigned. While the softkey
labels cannot be re-assigned, the trace values can be changed manually
under the Traces 6 hardkey using the Detector softkey. Learn more, refer
to
“How to set Detection Method” on page 340.