Phase Noise - Keysight M9290A Manual

Phase Noise

Description
Phase Noise
(Center Frequency = 1 GHz,
Best-case Optimization
b
Internal Reference )
Offset Frequency
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
10 MHz
a. Noise sidebands for lower offset frequencies, for example, 10 kHz, apply with the phase noise
optimization (PhNoise Opt) set to Best Close-in  Noise. Noise sidebands for higher offset
frequencies, for example, 1 MHz, as shown apply with the phase noise optimization set to Best
Wide-offset  Noise.
b. Specifications are given with the internal frequency reference. The phase noise at offsets below
100 Hz is impacted or dominated by noise from the reference. Thus, performance with external
references will not follow the curves and specifications. The internal 10 MHz reference phase
noise is about –120 dBc/Hz at 10 Hz offset; external references with poorer phase noise than this
will cause poorer performance than shown.
34
Specifications
a
20 to 30C
–102 dBc/Hz
–106 dBc/Hz
–108 dBc/Hz
–130 dBc/Hz
Supplemental
Information
Noise Sidebands
Full range Typical
–90 dBc/Hz (nominal)
–100 dBc/Hz –105 dBc/Hz
–105 dBc/Hz –110 dBc/Hz
–107 dBc/Hz –110 dBc/Hz
–129 dBc/Hz –132 dBc/Hz
–145 dBc/Hz (nominal)