Jackson Labs PHASE STATION 53100A, User Manual

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PhaseStation 53100A User’s Manual V1.04 25-Apr-2022 87
boundaries. As seen in the figures above, a straight line in the phase record corresponds to a
flat region in the
Measurement → Frequency difference ( f ) view.
You can use Edit → Flatten selected or zoomed phase data ( Ctrl-f ) to remove glitches
and outliers from an acquisition. Subsequently, Edit → Undo last flatten or subtract
operation ( Ctrl-z ) can be used to restore the flattened data. Unless you absolutely must
preserve the original length of the phase record, though, it’s better to use
Edit → Remove selected or zoomed phase data ( F4 ) in most cases.
No active background tasks may be under way for the selected plot at the time this
command is issued. Active background tasks are those in which the plot’s memory-
resident phase record is being written, such as during initial acquisition and when
reloading a saved .TIM file. If the phase record has finished loading but the xDEV
statistical traces are still being refreshed, the refresh operation will be cancelled, then
restarted after the command finishes.
Remove selected or zoomed phase data ( F4 )
Like Edit → flatten selected or zoomed phase data ( Ctrl-f ) , this command is useful for
removing glitches and outliers from the selected plot’s phase record. Instead of
replacing the affected region with a straight line, however,
Edit → Remove selected or
zoomed phase data ( F4 ) shortens the phase record by removing the data altogether.
This command has the same requirements and constraints as Edit → Flatten selected or
zoomed phase data ( Ctrl-f ) , except that it cannot be undone with Edit → Undo last
flatten or subtract operation ( Ctrl-z ). Consider saving your original data to a .TIM file
first so that it can be recovered if necessary.
When removing data from the middle of the phase record, you’ll be asked if you want to
maintain phase continuity. In virtually all circumstances you should respond “Yes” to
this prompt. TimeLab will then ensure a seamless transition between the two remaining
regions by applying a constant offset to the phase data following the removed region.
Otherwise, an abrupt phase change due to lost continuity may appear as a glitch in the
data.
No active background tasks may be under way for the selected plot at the time this
command is issued. Active background tasks are those in which the plot’s memory-
resident phase record is being written, such as during initial acquisition and when
reloading a saved .TIM file. If the phase record has finished loading but the xDEV
statistical traces are still being refreshed, the refresh operation will be cancelled, then
restarted after the command finishes.
When the phase record associated with a cross ADEV measurement’s primary or
secondary plot is being altered by this command, the same region of data will