Agilent Technologies E1420B, User Manual

Page: 219 / 476

Residual Measurement Fundamentals
7
Agilent E5505A User’s Guide 219
Disadvantages
• Requires a phase modulator which operates at the desired carrier
frequency.
• Requires audio calibration source.
• Requires RF spectrum analyzer for manual measurement of
Φ
M
sidebands
or preferably a modulation analyzer.
PPP P
Procedure
1 Connect circuit as per Figure 157 and tighten all connections.
2 Measure the power level that will be applied to the signal input port of the
test set’s phase detector.
Table 34 shows the acceptable amplitude ranges
for the E5505A system phase detectors.
NO T E
Because the calibration is performed under actual measurement conditions, the
Double-sided Spur Method and the Single-sided Spur Method are the two most accurate
calibration methods.
NO T E
Most phase modulators are typically narrow-band devices; therefore, a wide range of test
frequencies may require multiple phase modulator.
Figure 157 Calibration setup
Power
splitter Phase
detector
Source
-10 dB
attenuator
E5505a_calibration_setup
27 Feb 04 rev 1
Optional line
stretcher
Phase
modulator
Test set
Signal
input
Ref input
50
Ω
load