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Because the calibration is performed under actual measurement conditions, the
NO T E
Double-sided Spur Method and the Single-sided Spur Method are the two most accurate
calibration methods.
Disadvantages
• Requires a phase modulator which operates at the desired carrier
• Requires audio calibration source.
• Requires RF spectrum analyzer for manual measurement of
PPP P
Most phase modulators are typically narrow-band devices; therefore, a wide range of test
NO T E
frequencies may require multiple phase modulator.
Procedure
1
Source
Figure 157 Calibration setup
2
Agilent E5505A User's Guide
frequency.
or preferably a modulation analyzer.
Connect circuit as per
Power
splitter
-10 dB
attenuator
50Ω
load
Measure the power level that will be applied to the signal input port of the
test set's phase detector.
for the E5505A system phase detectors.
Residual Measurement Fundamentals
Figure 157
and tighten all connections.
Optional line
stretcher
Signal
input
Phase
modulator
Ref input
Table 34
shows the acceptable amplitude ranges
ΦM
sidebands
Test set
Phase
detector
E5505a_calibration_setup
27 Feb 04 rev 1
7
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