Chapter 15 311
Functional Tests
Scale Fidelity
Figure 15-7 Scale Fidelity Setup
NOTE Averaging is used for all measurements to improve repeatability and reduce
measurement uncertainty.
Procedure
1. Configure the equipment as shown in Figure 15-7.
2. Preset the Source and press
Mode, Spectrum Analyzer, Mode Preset on the
analyzer.
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, More, Freq Ref In, External
FREQ Channel, Center Freq
, 50, MHz
SPAN X Scale, Span
, 1, MHz
AMPTD Y Scale, Ref Level,
0, dBm
Meas Setup, Average/Hold Number,
10, Enter
Trace/Detector, 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.
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