720 Keysight N9038A MXE Service Guide
Tests
Quasi-Peak Detector Accuracy
4. Tune the receiver to 500 MHz with a span of 0 Hz by pressing FREQ
Channel, Center Freq, 500 MHz then SPAN X Scale, Zero Span.
5. Set the Sweeptime to 2 seconds by pressing Sweep / Control, 2 s.
6. Set the EMI receiver input attenuator to 18 dB by pressing AMPTD Y Scale,
Attenuation, 18 dB.
7. Set the amplitude units to dBμV by pressing AMPTD Y Scale, More, Y Axis
Unit, More, dBμV.
8. Set the reference level to 80 dBμV by pressing AMPTD Y Scale, 80 dBμV.
9. Change the detector used by the EMI receiver to Quasi-Peak by pressing
Trace / Detector, More, Detector, More, Quasi Peak.
10.Put the EMI receiver in single sweep operation by pressing Single.
11.Take a single sweep on the EMI receiver by pressing Restart.
12.Once the sweep has completed find the peak of the detector output by
pressing Peak Search.
13.Record the marker value in Table 22-36 as the Measured value for the
Band D reference PRF.
14.Put the marker in Delta mode by pressing Marker, Delta.
15.Turn on the continuous peak function by pressing Peak Search, More,
Continuous Peak Search On
.
16.Change the Pulse Frequency on the IGUU 2916 EMI pulse generator to 20
Hz.
17.Take a single sweep on the EMI receiver by pressing Restart.
18.Once the sweep on the EMI receiver has completed and the auto peak
value is found record the marker delta amplitude value for the pulse
frequency being measured in Table 22-37.
Table 22-36 Quasi-Peak Sine-Wave Voltage Accuracy Band D - CISPR 16-1-1: 2010 Section 4.3
Pulse Frequency (Hz) Band D
Lower Limit (dBμV) Measured (dBμV) Upper Limit (dBμV)
100 58.0 62.0
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