Keysight Technologies C Series - How to Set Up Electromagnetic Interference (EMI) Mode Settings; EMI Measurement Mode Setup Procedure

Keysight N9915-90020 User’s Guide 345
Electromagnetic Interference (EMI) Measurements – Option 361
How to Set Up Electromagnetic Interference (EMI) Mode Settings
How to Set Up Electromagnetic Interference (EMI) Mode Settings
This section reviews the steps in setting up an example EMI measurement. If
you are not familiar with this process or would like more information, refer to
“Using EMI Measurements (Option 361)” on page 327.
EMI Measurement Mode Setup Procedure
1. Selecting EMI Measurement mode:
Press Mode
> More (Depends on number of Options) > EMI Measurements
2. Setting the EMI Measurement type:
For this example, press Measure 1
> Measurement > CISPR Band Scan
— The display updates to show three traces: PosPeak T1 (P),
QuasiPeak T2 (
Q), and EmiAverageT3 (A). Learn more, see “CISPR
(International Special Committee on Radio Interference) Control” on
page 331
.
3. Setting the CISPR Band:
For CISPR Band Scan, these traces become active and begin sweeping.
Optional: for this example, press
PosPeak T1, QuasiPeak T2, or
EmiAverage T3 to enable/disable each detector/trace. (default = all on.)
Learn more, see
“How to set the EMI Traces” on page 339.
4. Setting the EMI detectors for each trace:
For this example, press CISPR Band > C 30 – 300 MHz (default).
Learn more, see “How to set a CISPR Band” on page 333.
5. Setting the Log Freq AxisX state for the displayed trace:
For this example, press
Log Freq AxisX > ON (default). Optional: Press to
OFF to change display to linear view.
Learn more, see “How to set Frequency Range and Frequency Context” on
page 329
.
IMPORTANT! See also,
“Alignments” on page 206, in SA mode, Chapter 9,
“SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)FUTURE.”
The EMI Resolution bandwidth is auto-coupled to keep frequency range
with the selected CISPR band. If the Start or Stop frequencies are
changed, the FieldFox displays a reminder message about the CISPR band
limits.
Example of CISPR messages: "CISPR band StartFreq limited to
30000000" and "CISPR band StopFreq limited to 300000000".