496 Keysight NFA Series Noise Figure Analyzers Service Guide
Functional Tests
Frequency Readout Accuracy
Figure 17-2 Frequency Readout Accuracy Test Setup
Procedure
1. Configure the equipment as shown in Figure 17-2. Confirm the analyzer’s
built-in auto alignment has been performed within the past 24 hours.
2. On the synthesized sweeper, press PRESET, then set the controls as
follows:
FREQUENCY, 1505, MHz
POWER LEVEL, –10, dBm
3. Set up the signal analyzer by pressing:
MODE/MEAS. Select Spectrum Analyzer mode, Swept SA
measurement, Normal view. Press OK. Press Mode Preset
Input/Output, Freq Ref Input, Freq Ref Input External
FREQ, Center Frequency, 1505, MHz
Span, 2990, MHz
Trace, Detector, Sample
Single/Cont to place analyzer in Single Sweep.
4. Press Restart.
Press Peak Search on the analyzer. If the instrument is functioning
correctly, the marker reading in the active function block will be between
the values listed in Table 17-4. Record the marker value in the Marker
Frequency Readout column in Table 17-4.
5. On the signal analyzer, change the span and center frequency as listed in
Table 17-4.
6. Change the synthesized sweeper frequency to match the center frequency
of the analyzer.
7. Repeat step 4 through step 6 until the Marker Frequency Readout column
of Table 17-4 is complete.
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