3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
Measure at Marker
When this control is pressed, the instrument executes one Measure at Marker
function and then returns. Measure at Marker goes to the frequency of the selected
marker and takes a reading with each of the three detectors selected in the
Detectors menu, using the dwell times specified there, then displays the readings in
a window on the display, using the current Y-Axis Unit.
When the Measure at Marker is complete, the instrument restores all settings to
their pre-Measure-at-Marker values and normal sweeps resume.
Remote Command
:CALCulate:MARKer[1]|2|…|24:FUNCtion:MAMarker?
Example Perform a Measure at Marker function at Marker 2’s current frequency and, when completed, return
the results of the measure at marker window:
:CALC:MARK2:FUNC:MAM?
Notes Returns comma-separated values for the 3 specified detectors and the frequency value of the marker
If a Detector is off, or if no measurement has yet completed, –999.0 is returned. This can happen, for
example, if you are operating with too large a value of (span/sweep points) and the Measure at Marker
function does not execute but instead displays the advisory message, “Span per point too large,
narrow span or increase RBW or number of points” (see below)
The size of the return data array is fixed at 4. The elements are:
1. Detector 1 value ( if off, –999.0 for backwards compatibility)
2. Detector 2 value ( if off, –999.0 for backwards compatibility)
3. Detector 3 value ( if off, –999.0 for backwards compatibility)
4. Frequency of Marker
If a sweep is in process when this function executes it aborts, and restarts after the function is
complete
Dependencies Only appears in the N/W6141A application or when Option EMC is installed and licensed
If BW & Avg Type is in an Autocoupled state, the (up to three) measurements taken by Measure at
Marker are taken with Auto Coupled settings for the functions in the BW menu, even if those functions
are in manual
Couplings If the specified Marker is not on, the instrument turns it on at the center of the screen and does a peak
search before performing the function
Annunciation In the status line messages indicate the progress of the function
Annotation In the Measure at Marker Window
Status Bits/OPC
dependencies
OPC goes true when the measurement is complete
Backwards
Compatibility SCPI
:MEASure:EMI:MARKer[1]|2|…|12?
Backwards
Compatibility
Notes
Included for compatibility with the E7400 and PSA option 239. Performs a Measure at Marker function
at the specified marker’s current frequency and returns the results
362 Spectrum Analyzer Mode User's &Programmer's Reference
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