Agilent Technologies E4428C ESG, Руководство по установке

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Chapter 3 31
Operation Verification
Power Level Accuracy Check
Configure the Spectrum Analyzer
1. Preset the spectrum analyzer.
2. Set the analyzer to external 10 MHz reference.
3. Set the center frequency to 277 kHz.
4. Set the frequency span to 100 Hz. (This will result in a 1 Hz resolution bandwidth with a digital filter.)
Measure the Power Level Accuracy
1. Transfer the power level results for each frequency at
−
45 dBm from the Measured Power column in
Table 3-8 to the Power Meter Reading for
−
45 dBm column in Table 3-9 .
2. On the spectrum analyzer, use the marker to measure the signal.
a. Use the marker peak and search features to set a marker on the signal peak.
b. Set the marker to the reference level of the spectrum analyzer.
c. Enable the marker delta function. Ensure that the delta shows 0 dB.
3. On the ESG, decrease its amplitude in 10 dB steps as shown for the power levels in Table 3-9 for the
current frequency. With each 10 dB step, select the marker menu and peak the marker to ensure that the
marker is on the signal peak.
4. Using the marker peak search, reset the marker to the signal peak.
5. Measure the power levels listed in the Power Level Setting (dBm) column of Table 3-9 for the current
frequency, and record the values in the Spectrum Analyzer Marker (dB) column.
6. Return the signal generator amplitude to
−
45 dBm, and set the signal generator frequency and the
spectrum analyzer’s center frequency to the next frequency listed in Table 3-9 and repeat the process
from step 2 .
7. Repeat steps 2 – 6 until all of the frequencies have been measured and recorded (to the maximum signal
generator frequency).