98 Chapter 2
Performance Verification Tests
12. Display Scale Fidelity
16. Press SPAN, Zero Span on the analyzer.
17.Adjust the synthesized signal generator amplitude until the analyzer
marker amplitude reads 0 dBm ± 0.1 dB.
75 Ω Input: Adjust the synthesized signal generator amplitude until the
analyzer marker amplitude reads 48.75 dBmV ± 0.1 dB.
NOTE Do not adjust the synthesized signal generator amplitude after the reference is
established.
18. On the analyzer, press Marker, Delta.
Measure the Cumulative Log Fidelity
19.On the analyzer, press Single, BW/Avg, Average, 5, Enter.
20.Perform step 22 to step 24 for each measurement value in
Table 2-17.
21.Set the 1 dB and 10 dB step attenuators as indicated in Column 2
and Column 3 of Table 2-16 for the various dB from REF LVL
settings.
22.Press Single and wait for “VAvg 5” to be displayed to the right of the
graticule area.
23.Record the marker delta (∆ Mkr1) amplitude reading in Column 7 of
Table 2-16.
24.Calculate the Cumulative Log Fidelity Error (CLFE) as follows, and
record the result in the performance verification test record as
indicated in Column 8 of Table 2-16.
CLFE = Total Actual Attenuation + ∆Mkr Reading – Total
Actual Atten (0 dB from Ref Level)