Agilent Technologies Signal Analyzer N9030a - Manual (Page 123)

3 Programming the Analyzer
Remote Measurement Functions
:CALCulate:DATA[1]|2|...6:PEAKs? <threshold>,<excursion>[,AMPLitude |
FREQuency | TIME[,ALL | GTDLine | LTDLine]]
For most other measurements:
:CALCulate:DATA[1]|2|...6:PEAKs? <threshold>,<excursion>[,AMPLitude |
FREQuency | TIME]
Example Example for Swept SA measurement in Spectrum Analyzer Mode:
CALC:DATA4:PEAK? –40, 10, FREQ, GTDL
This identifies the peaks of trace 4 that are above –40 dBm, with excursions of at least 10 dB.
The peaks are returned in order of increasing frequency, starting with the lowest frequency. Only
the peaks that are above the display line are returned.
Query Results 1:
With FORMat:DATA REAL, 32 selected, returns a list of floating-point numbers. The first value in
the list is the number of peak points that are in the following list. A peak point consists of two
values: a peak amplitude followed by its corresponding frequency (or time).
If no peaks are found, then the peak list consists of only the number of peaks, (0).
Notes
l
<n> - is the trace that will be used
l
<threshold> - is the level below which trace data peaks are ignored. Note that the threshold
value is required and is always used as a peak criterion. To effectively disable the threshold
criterion for this command, provide a substantially low threshold value such as –200 dBm.
Also note that the threshold value used in this command is independent of and has no effect
on the threshold value stored under the Peak Criteria menu.
l
<excursion> - is the minimum amplitude variation (rise and fall) required for a signal to be
identified as peak. Note that the excursion value is required and is always used as a peak
criterion. To effectively disable the excursion criterion for this command, provide the
minimum value of 0.0 dB. Also note that the excursion value used in this command is
independent of and has no effect on the excursion value stored under the Peak Criteria
menu.
Values must be provided for threshold and excursion, but the sorting and display line parameters
are optional (defaults are AMPLitude and ALL).
Note that there is always a Y-axis value for the display line, regardless of whether the display
line state is on or off. It is the current Y-axis value of the display line, which is used by this
command to determine whether a peak should be reported.
l Sorting order:
l
AMPLitude - lists the peaks in order of descending amplitude, with the highest peak first
(default if optional parameter not sent)
l
FREQuency - lists the peaks in order of occurrence, left to right across the x-axis.
Remote Language Compatibility Measurement Application Reference 123