148 Chapter 4
Optimizing Performance
Optimizing Phase Noise and Harmonics Below 3.2 GHz (Option UNX/UNY)
Optimizing Phase Noise Below 250 MHz (serial prefix > xx4928 and higher)
This feature is available on instruments with Option UNX or Option UNY, and serial number prefix
>
xx4928 and higher.
CAUTION Maximum available power below 3.2 GHz is lower when the Optimizing Phase Noise
Below 250 MHz softkey is been pressed. Refer to the PSG’s Data Sheet.
The PSG’s low band phase noise can be improved below 250 MHz by using the Low Phase Noise
Below 250 MHz softkey. Refer to the PSG’s Data Sheet. See also “Optimizing Harmonics Below 2 GHz”
on page 149.
Figure 4-7 Low Band Phase Noise Below 250 MHz
Frequency > More > More > RF Path
For SCPI commands, refer to the SCPI Command Reference.
When the
Low Phase
Noise Below
250 MHz
softkey has
been
pressed, the
Frequency
Status
Information
displays the
setting in the
RF Path
annunciator.
Enables
improved
phase noise
below
250 MHz.
Caution:
Enabling this
feature may
degrade
power below
3.2 GHz.
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