6 List Sequence Measurements
List Sequence Measurements
•
BLOCk or block data - returns all the data points from the region of the trace data that you specify. For
example, it could be used to return the data points of an input signal over several timeslots, excluding
the portions of the trace data that you do not want. (This is x,y pairs for trace data and I,Q pairs for
complex data.)
•
CFIT or curve fit - applies curve fitting routines to the data. <soffset> and <length> are required to define
the data that you want. <roffset> is an optional parameter for the desired order of the curve equation.
The query will return the following values: the x-offset (in seconds) and the curve coefficients ((order + 1)
values).
MIN, MAX, MEAN, DME, RMS, RMSC, SAMP, SDEV and PPH return one data value for each specified region
(or <length>) of trace data, for as many regions as possible until you run out of trace data (using <roffset>
to specify regions). Or they return the number of regions you specify (using <rlimit>) ignoring any data
beyond that.
•
MINimum - returns the minimum data point (y value) for the specified region(s) of trace data. For I/Q
trace data, the minimum magnitude of the I/Q pairs is returned.
•
MAXimum - returns the maximum data point (y value) for the specified region(s) of trace data. For I/Q
trace data, the maximum magnitude of the I/Q pairs is returned.
•
MEAN - returns a single value that is the arithmetic mean of the data point values (in dB/ dBm) for the
specified region(s) of trace data. For I/Q trace data, the mean of the magnitudes of the I/Q pairs is
returned. See the following equations.
•
If the original trace data is in dB, this function returns the arithmetic mean of those log values, not log of
the mean power which is a more useful value. The mean of the log is the better measurement technique
when measuring CW signals in the presence of noise. The mean of the power, expressed in dB, is useful in
power measurements such as Channel Power. To achieve the mean of the power, use the RMS option.
Equation 1
Mean Value of Data Points for Specified Region(s)
where Xi is a data point value, and n is the number of data points in the specified region(s).
Equation 2
Mean Value of I/Q Data Pairs for Specified Region(s)
where |Xi| is the magnitude of an I/Q pair, and n is the number of I/Q pairs in the specified region(s).
•
DMEan - returns a single value that is the mean power (in dB/ dBm) of the data point values for the
specified region(s) of trace data. See the following equation:
274
Sequence Analyzer User's & Programmer's Reference
Содержание E6650A EXF
Страница 34: ...1 About the Test Set Mouse and Keyboard Control 34 Sequence Analyzer User s Programmer s Reference...
Страница 94: ...2 Programming the Test Set Common Commands 94 Sequence Analyzer User s Programmer s Reference...
Страница 129: ...4 Mode Functions Undefined variable Primary ProductName Sequence Analyzer User s Programmer s Reference 129...
Страница 145: ...5 System Functions Undefined variable Primary ProductName Sequence Analyzer User s Programmer s Reference 145...
Страница 206: ...5 System Functions System 206 Sequence Analyzer User s Programmer s Reference...
Страница 214: ...6 List Sequence Measurements File File See File on page 146 214 Sequence Analyzer User s Programmer s Reference...
Страница 474: ...6 List Sequence Measurements Mode Mode See Mode on page 130 474 Sequence Analyzer User s Programmer s Reference...
Страница 478: ...6 List Sequence Measurements Print Print See Print on page 151 478 Sequence Analyzer User s Programmer s Reference...
Страница 642: ...6 List Sequence Measurements System System See System on page 152 642 Sequence Analyzer User s Programmer s Reference...