Keysight NFA Series Noise Figure Analyzers Service Guide 515
Functional Tests
Scale Fidelity
Figure 17-7 Scale Fidelity Setup
Procedure
1. Configure the equipment as shown in Figure 17-7.
2. Preset the Source and press MODE/MEAS on the analyzer. Select the
Spectrum Analyzer mode, Swept SA measurement, and Normal view.
Press OK. Press Mode Preset.
3. Set up the synthesized sweeper by pressing:
Frequency, 50, MHz
Amplitude, +5, dBm
RF On/Off, On
4. Set up the signal analyzer by pressing:
Input/Output, Freq Ref Input, Freq Ref Input External
FREQ, Center Frequency, 50, MHz
Span, 1, MHz
AMPTD, Y Scale, Ref Level, 0, dBm
Meas Setup, Avg/Hold Number, 10, Enter
Trace, Trace Average
Peak Search
5. Set the external 10 dB step attenuator to 0 dB.
6. Adjust the amplitude on the signal source until the marker amplitude on
the analyzer reads –15 dBm ±0.2 dB.
Averaging is used for all measurements to improve repeatability and
reduce measurement uncertainty.
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