Agilent Technologies Signal Analyzer N9030a - Manual (Page 723)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
Marker
Notes Fixed markers are not counted, but a Fixed marker will have a count stored in it if it is selected or
is the reference marker for the selected marker. The count already in the marker is stored when
the marker becomes fixed and if there is none or the marker moves (for example, Pk Search) it is
counted and stored after the next sweep.
If a Fixed marker has a count stored in it, that count will be displayed when the marker is
selected, and used as the reference count when that marker is a reference marker.
If a Fixed marker has a count stored in it, that count will be deleted if the marker X is adjusted.
If a Fixed marker has a count stored in it, and a Search function is performed using the Fixed
marker, while the counter is on, the count stored in the marker will be updated.
If a Fixed marker has a count stored in it, and is a reference marker, and the reference is moved
to a valid trace point by re-zeroing the delta (by pressing Delta again or sending the DELTa SCPI
command), while the counter is on, the count stored in the marker will be updated.
Notes This command causes the specified marker to become selected.
Dependencies Marker Count is unavailable (grayed out and Off) if the Gate function is on.
Couplings If the selected marker is Off when the counter is turned on, the selected marker is set to Normal
and placed at center of screen on the trace determined by the Marker Trace rules.
If a marker that is OFF is selected while the counter is on, the counter remains on, but since the
marker is off, the count is undefined. In this case the analyzer will return not a number to a SCPI
count query.
The counter is turned OFF when the selected marker is turned OFF.
Preset OFF
State Saved The state of the counter (on/off) is saved in instrument state. In the case of Fixed markers, the
count stored in the marker is saved in instrument state.
Backwards Compatibility
Notes In some legacy analyzers (e.g., the 8560 series) the FreqOffset value was applied to the Marker
Count. In others (e.g., ESA and PSA) it was not. The X-Series follows the ESA/PSA model and
does not apply Freq Offset to the Marker Count.
In ESA and PSA the reference marker for Delta markers was always counted. In the X-Series the
marker is counted for Normal and Delta markers; but for the reference marker, if it is a Fixed
marker, we use the count stored in the Fixed marker. This enhanced capability may require a
change to some users’ code and/or test procedures.
Initial S/W Revision Prior to A.02.00
Query Count Value
Queries the frequency count. The query returns the absolute count unless the specified marker is
in Delta mode, then it returns the relative count. If the marker is off, or the marker is on but the
counter is off, the analyzer will return not a number to a SCPI count query. A marker with no
stored count, or a non-Fixed marker on a stored trace, will also return not a number to a SCPI
Remote Language Compatibility Measurement Application Reference 723