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3-9
Programming
Making Measurements
Measurement instructions give quick results
The easiest way to measure wavelength, frequency, or power is to use
the MEASure command. The MEASure command is one of four mea-
surement instructions: MEASure, READ, FETCh, and CONFigure. The
syntax for measurement instructions is documented in “Measurement
Instructions” on page 4- 15.
Each measurement instruction has an argument that controls the mea-
surement update rate. This is equivalent to using the NORMAL and
FA S T softkeys.
:MEASure command
MEASure configures the Agilent 86120C, captures new data, and que-
ries the data all in one step. For example, to measure the longest
wavelength, send the following command:
:MEASure:SCALar:POWer:WAVelength? MAX
Specifying SCALar places the display in the single wavelength format
and returns a single value to the computer. Specifying ARRay places
the display in the List by Power or List by WL modes; an array of data is
returned to the computer.
Table 2-5. The Different Forms of MEASure
Desired
Measurement Data
Use this
MEASure Query
Display Format
Power (W, dBm) :MEASure:ARRay:POWer? List by Power
:MEASure:SCALar:POWer? single wavelength mode
Frequency (Hz) :MEASure:ARRay:POWer:FREQuency? List by WL (frequency)
:MEASure:SCALar:POWer:FREQuency? single wavelength mode
Wavelength (m) MEASure:ARRay:POWer:WAVelength? List by WL
MEASure:SCALar:POWer:WAVelength? single wavelength mode
Wavenumber (m
–1
)
:MEASure:ARRay:POWer:WNUMber? List by WL
:MEASure:SCALar:POWer:WNUMber? single wavelength mode