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Chapter 2 159
Performance Verification Tests
21. Resolution Bandwidth Accuracy
Attenuator Error (6 dB) ___________ dB
3 dB Resolution Bandwidth Accuracy
6. Press
Peak Search (or Search), Meas Tools, Mkr→ CF on the analyzer.
7. Adjust the amplitude of the synthesized signal generator for a
marker amplitude reading of
−5dBm ±0.2 dB.
8. Press
Peak Search (or Search), Marker, Delta on the analyzer.
9. Set the attenuator to 0 dB.
10.On the analyzer, press Marker. Lower the marker frequency by
adjusting the knob until the marker delta amplitude is 0 dB plus the
attenuator error (3 dB) noted in step 5 to a tolerance of
±0.05 dB.
11.Record the marker frequency readout in Column 3 of Table 2-38.
12.Using the analyzer knob, raise the marker frequency so that the
marker delta amplitude is maximum. Continue increasing the
marker frequency until the marker reads 0.0 dB plus the attenuator
error (3 dB) noted in step 5 to a tolerance of
±0.05 dB.
13.Record the marker frequency readout in Column 4 of Table 2-38.
14.Set the attenuator to 3 dB.
15.Press
Marker, Normal on the analyzer.
16.Repeat step 6 through step 15 for each of the analyzer Res BW and
Analyzer Span settings listed in Table 2-38.
17.Subtract the Lower Marker Frequency from the Upper Marker
Frequency. Record the difference as the 3 dB Bandwidth, in the
performance verification test record as indicated in Table 2-38.
3 db Bandwidth = Upper Marker Frequency
− Lower Marker