Jackson Labs PHASE STATION 53100A, User Manual

Page: 90 / 225

PhaseStation 53100A User’s Manual V1.04 25-Apr-2022 90
fundamental interference from ground loops in countries that utilize North American power
distribution standards.
Note that AC line-frequency interference in 50 Hz environments may appear as long-term
artifact(s) with a period close to DC. If this is suspected, consider using the 5 Hz or 500 Hz
measurement bandwidths instead. The former setting will eliminate most AC line interference
adequately, while the latter setting will allow it to be removed with the notch filter.
The effect of the notch filter can be reverted with the Undo last flatten or subtract operation
( Ctrl-z ) command.
Undo last flatten or subtract operation ( Ctrl-z )
This command rolls back the most recent change to the selected plot performed by any of the
following other commands:
• Edit→Flatten selected noise region ( Ctrl-F8 )
•
Edit → Flatten selected or zoomed phase data ( Ctrl-f )
• Edit → Subtract global linear phase trend (frequency offset) (
Ctrl-o
)
•
Edit → Subtract global linear frequency trend (drift line) ( Ctrl-l)
•
Edit → Subtract quadratic linear frequency trend (drift curve) ( Ctrl-q )
•
Edit → Trace properties ( e ) ( applies to Rescale Phase only )
•
Edit→Apply notch filter to phase record ( Ctrl-n )
A second “undo” command will redo the last-reverted action in all cases except for
flattening operations in AM noise or phase noise plots. These commands must be
reissued manually.
If the selected plot has any background tasks in progress when this command is issued,
an error message will be displayed. Background tasks are those in which the plot’s
memory-resident phase record is being accessed by a background thread during initial
acquisition, when reloading a saved .TIM file, and when reconstructing the xDEV
statistical traces after a previous modification to the phase record.