Keysight N9038A MXE Service Guide 753
Tests
RMS Average Detector Accuracy
Band D Testing
1. Setup the IGUU 2916 EMI pulse generator as follows:
a. Aux. Generator: Band C/D
b. Pulse Frequency: 1000 Hz
c. Amplitude: 40 dBµV
2. Connect the IGUU 2916 EMI pulse generator Output Auxiliary Generator
Band A/B/C/D to the EMI receiver RF Input.
3. Preset the EMI receiver by pressing Mode Preset.
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 1 second by pressing Sweep / Control, 1 s.
6. Set the amplitude units to dBµV by pressing AMPTD Y Scale, More, Y Axis
Unit, More, dBµV.
7. Set the reference level to 80 dBµV by pressing AMPTD Y Scale, 80 dBµV.
8. Change the detector used by the EMI receiver to RMS Average by pressing
Trace / Detector, More, Detector, More, RMS Average.
9. Set the EMI receiver input attenuator to 0 dB by pressing AMPTD Y Scale,
Attenuation, 0 dB.
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 22-68 as the Measured value for the
Band D reference PRF.
14.Calculate the Error with the following formula and enter the value in Table
22-68.
Error = Measured – 40 dBµV + 10.41 dB
15.Put the marker in Delta mode by pressing Marker, Delta.
Table 22-68 RMS Average Amplitude Relationship Band D – CISPR 16-1-1 :2010 Section 7.5.2
Pulse Frequency
(Hz)
Band D
Measured
(dBµV)
Lower Limit
(dB)
Error
(dB)
Upper Limit
(dB)
5000 -2.0 +2.0
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