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4-19
Programming Commands
Measurement Instructions
MEASure{:ARRay | [:SCALar]} :POWer:FREQuen-
cy?
Returns frequency values.
Syntax
:POWer:FREQuency? [<expected_value>[,<resolution>]]
Description When used with a :SCALar command, a single value is returned. The
display is placed in the single-wavelength mode, and the marker is
placed on the signal having a frequency that is closest to the
<expected_value> parameter. Default units for <expected_value>
parameter are in Hz. When used with an :ARRay command, an array
of frequencies is returned. The display is placed in the list-by-wave-
length mode.
The <resolution> parameter sets the resolution of the measurement. It
is a unitless number whose value will be limited to either 0.01 or
0.001 (whichever is closer). MAXimum resolution is equivalent to the
FAST measurement update mode. MINimum resolution is equivalent to
the NORMAL measurement update mode.
Returned values are in Hz (display is in THz). Power units are not
affected.
<expected_value>
Constants
MAXimum The highest frequency signal
MINimum The lowest frequency signal
Used With <expected_value> <resolution>
SCALar optional optional
ARRay
ignored
a
a. Although ignored, this argument must be present if the resolution argument is specified.
optional
CONFigure command
When this function is used with the CONFigure command, the query question
mark character “?” must not be included in the string. However, the FETCh, READ,
and MEASure command are queries and require the question mark. Refer to the
examples for this command.