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Agilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide 251
Real–Time Phase Noise Impairments (Option 432)
The Agilent MXG Phase Noise Shape and Additive Phase Noise Impairments
The Agilent MXG Phase Noise Shape and Additive Phase Noise Impairments
Flat mid–frequency offset
−50 dBc/Hz
−50 dBc/Hz
Phase Noise Plots Without Phase Noise Impairment
The Agilent MXG demonstrates a definitive
shape to its phase noise plot. The
mid–frequency offsets are characterized by a
leveling (flattening) of the phase noise
amplitude from approximately a 3 kHz offset
to approximately a 70 kHz offset.
Close in and far out offsets demonstrate
slopping characteristics (areas before and
after the mid–frequency offsets).
The signal generator degrades the phase noise by moving the mid–frequency characteristics and/or
changing its amplitude using the following settings:
• Start frequency (f1) of the mid–frequency characteristics
• Stop frequency (f2) of the mid–frequency characteristics
• Amplitude (Lmid) of the mid–frequency characteristics
f1
f2
Mid–frequency characteristics
−50 dBc/Hz
−50 dBc/Hz
Amplitude
(Lmid)
This is a plot of the unmodified phase noise
shape that shows the location that each
value alters.