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Chapter 7 111
Phase Noise Measurement Application
General Specifications
Description Specifications Supplemental Information
Offset Frequency
Range 3 Hz to (ƒ
opt
− ƒ
CF
) Hz
ƒ
opt
: Maximum frequency determined by option
a
ƒ
CF
: Carrier frequency of signal under test
a. For example, ƒ
opt
is 3.6 GHz for Option 503.
Accuracy
b
b. The frequency offset error in octaves causes an additional amplitude accuracy error proportional to the
product of the frequency error and slope of the phase noise. For example, a 0.01 octave frequency error
combined with an 18 dB/octave slope gives 0.18 dB additional amplitude error.
±0.5
%
±0.0072 octave
Nominal Phase Noise at Different Center Frequencies
See the plot of basebox Nominal Phase Noise on page 55