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9. Disconnect the power sensor from the 100 MHz REF 1 OUT port, and connect it to the 100 MHz REF 2
OUT port.
10. Record the power reading from the power meter for the 100 MHz REF 2 OUT port.
Measurement Uncertainty
The expanded uncertainty of measurement for this test (noted as the "Uncertainty" value provided in the
Record Card
-- see page 36) represents the standard uncertainty of measurement multiplied by the coverage factor
k=2. For normal distribution, this corresponds to a coverage probability of approximately 95%.
Phase Noise Test
Test Method
Phase Noise is measured using the phase noise measurement capability of either a PXA or PSA signal analyzer.
Limitations and Considerations
Phase Noise
The limiting factor in this measurement is the base phase noise of the signal analyzer. Ideally, the phase noise of
the signal analyzer is much lower than the measured phase noise of the device under test. The PXA series of sig-
nal analyzers have low phase noise and are ideal for this measurement. The PSA series of signal analyzers phase
noise is about the same as the device under test. The PSA is only suitable if it is first calibrated with a low noise
signal source and the noise cancellation feature is employed, which was not considered for this test.
Specification
Table 1
Phase Noise
Conditions
≤ -115 dBc/Hz
@10 GHz, 10 kHz Offset
Equipment
Table 2
Equipment
Signal Analyzer
Cable: APC 3.5
Agilent M9302A PXI Local Oscillator Service Guide
Supported Models
Agilent N9030A, Opt 513 + N9068A Phase Noise Measurement
8120-4921
Source
M9302A Data Sheet
Performance Verification Tests
Test
25
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