APPH6000 User Manual V1.0 2010
- | Measurement using the Graphical User Interface (GUI)
18
Phase Noise Measurement
This function locks on the DUT’s output signal and measures the phase of the signal in the
specified offset frequency range. The following section describes the basic measurement
method of the DUT’s phase noise corresponding to the offset frequency from the carrier by
using the APPH6000’s GUI phase noise measurement window. This section describes the
following topics:
Setting Phase Noise Measurement Parameters
Perform Measurement and Visualize Results
Follow the steps below to measure the phase noise in the phase noise measurement tab of the
GUI.
A)
Select measurement configuration (see Fig 2)
DUT versus tunable internal or external reference: select this mode to measure the DUT
against a reference source. Either the DUT or the reference may be tuned by the TUNE1
output voltage. This measurement assumes that the reference phase noise is
substantially better than the DUT’s. The reference can be internal (option IS or IS400) or
external.
DUT versus tunable DUT comparison measurement: select this mode if two identical
DUTs are measured against each other. The 3 dB correction is taken into account.
Figure 5 Choice of supported phase noise measurements
