Bristol 871A - Page 47

Model 871A User’s Manual REMOTE COMMUNICATIONS
Bristol Instruments, Inc. 47
{ :MEASure | :READ | :FETCh } { :POWer | :ENVironment | :FREQuency | :WAVelength |
:WNUMber | :ALL }?
Description
Queries a reading of the given type from the measurement subsystem.
Query Response
See below.
Examples
See below.
Measurement Instruction Functions
:POWer?
Description
Returns a power reading as a relative value between 0 and 1
indicating the signal level on the detector.
Query Response
A fixed point value (e.g. 0.75).
Examples
:READ:POW?
:FETC:POW?
:ENVironment?
Description
Returns the instrument’s internal temperature in degrees Celsius (ºC)
and pressure in millimeters of mercury (mm Hg).
Query Response
Two numerical values with units, separated by a comma
(e.g., 28.5 C, 740 MMHG).
Examples
:MEAS:ENV?
:FETC:ENV?
:FREQuency?
Description
Returns an input laser reading in units of THz.
Query Response
A numerical value (e.g., 193.673574). The model 871A returns 9
significant digits.
Examples
:FETC:FREQ?
:MEAS:FREQ?
:WAVelength?
Description
Returns an input laser wavelength value in units of nm.
Query Response
A numerical value (e.g., 1548.9981). The model 871A returns 9
significant digits.
Examples
:FETC:WAV?
:READ:WAV?