Agilent Technologies PSA Series Manual page 50

Source Key and Programming Commands
External Source Configuration
Dependencies and
Couplings:
Remote Command
Notes:
Example:
50
The external source stop frequency is changed each time the
stop frequency of the PSA changes.
If the calculated external source stop frequency exceeds the
frequency range of the external source Error Message 13227
will be reported and the sweep stopped until you adjust either
analyzer start or stop frequency, the frequency offset (if ON) or
harmonic (if ON) so that the frequency range can be swept by
the signal source and analyzer simultaneously.
Query only
SOUR:EXT:SWE:STOP?
Chapter 4