Agilent Technologies Signal Analyzer N9030a - Manual (Page 695)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
Marker
State Saved Saved in instrument state
Backwards Compatibility
Notes The X Axis Scale of a marker (Readout in legacy analyzers) now has only one value, not one
value for frequency domain and another value for time domain. The value changes (if in Auto)
when the domain of the trace it is on changes. This means that the default behaviors are
identical, but if the user changes the readout manually in swept and expects the default to
remain in zero span, there may be some backwards compatibility problems. As an example, in the
old instruments, if the user set Readout to Period in a swept span, and the instrument was set to
zero span, the readout changed to Time, the default for Zero Span. Now, it will stay in Period
even in Zero Span until the user changes it or sets it back to Auto.
Additionally, all choices for X Axis Scale are now always allowed. In legacy analyzers the choices
of X Axis Scale were restricted based on the domain the instrument was currently in. Since the
new behavior is less restrictive this should not show up as a backwards compatibility issue.
Initial S/W Revision Prior to A.02.00
More Information
The X Axis Scale of a marker is the scale of its X Axis value. This affects the units displayed in the
Marker Result block and used to specify the marker’s X Axis location. The X Axis Scale is
specified using the Marker, Properties, X Axis Scale key.
All markers in swept spans have both a time and frequency value. Which of these is used for the
result display, and for positioning the marker, depends on the X Axis Scale setting. The X Axis
Scale
setting can be Frequency or Time, as well as the reciprocal of either (Period or Inverse Time).
There is also an Auto setting - when in Auto, a marker’s X Axis Scale changes whenever the domain
of the trace, upon which it set, changes. All choices for X Axis Scale are allowed. Note that this
behavior differs from the behavior in previous instruments: previously the instrument
remembered a different X Axis Scale (formerly called Readout) for each domain, and the choices of X
Axis Scale
were restricted. These restrictions were based on the current domain of the instrument.
Auto
When in Auto, the X-Axis Scale is Frequency if the Marker Trace is a frequency domain trace, Time
if the Marker Trace is a time domain trace. When in Auto, if the marker changes traces, or the
domain of the trace the marker is on changes, the auto result is re-evaluated. If the X Axis Scale is
chosen manually, that Scale is used regardless of the domain of the trace.
Key Path Marker, Properties, X Axis Scale
Example CALC:MARK2:X:READ:AUTO ON sets the marker 2 X-axis scaling to automatically select the
most appropriate units.
Initial S/W Revision Prior to A.02.00
Remote Language Compatibility Measurement Application Reference 695