Bristol 428 - Page 49

Model 428 User’s Manual REMOTE COMMUNICATIONS
Bristol Instruments, Inc. 49
:WNUMber?
Description
Returns an input laser reading in units of cm
-1
.
Query Response
A single numerical value (e.g., 6643.2891) for SCALar.
An integer value indicating the number of entries, followed by an array of
comma separated numerical values (e.g. 2, 6643.2891, 6654.1123) for
ARRay.
Examples
:FETC:SCAL:WNUM?
:MEAS:ARR:WNUM?
CALCulate Subsystem
The CALCulate subsystem { XE “Commands:CALCulate” } is used to read and control
the instrument's calculated values. The instrument continuously updates minimum and
maximum readings as well as deriving differences such as maximum minus minimum
and current minus start.
To retrieve CALCulate subsystem data, first choose a calculate data type and then
perform a calculate query. For example, to read the delta power, issue the following
commands:
:CALC:DELT:STAT ON Set up to read a delta value.
:CALC:DELT:METH REF Delta values are relative to the reference channel.
:CALC:DATA? POW Read the delta power.
CALCulate Subsystem Functions
:DATA? { POWer | FREQuency | WAVelength | WNUMber }
Description
Returns a calculated value of a pre-selected data type in the specified
units. In order for this function to return a result, you must first set up the
CALCulate subsystem using the :DRIFt, :DELTa, or :RESet commands.
Query Response
A numerical value in fixed point notation.
Examples
:CALC:DATA? POW
:CALC:DATA? WAV