Bristol 428 - Page 41

Model 428 User’s Manual REMOTE COMMUNICATIONS
Bristol Instruments, Inc. 41
:FETCh {:ARRay | :SCALar} {:POWer |
:ENVironment | :FREQuency | :WAVelength |
:WNUMber}?
Queries power, or wavelength that was measured
during the last measurement cycle and returns
immediately.
When used with a :SCALar command, only one
value is returned. When used with an :ARRay
command, a comma delimited array of values,
preceded by the number of values, is returned.
CALCulate Subsystem
These commands obtain calculated values from the
instrument, or set calculation parameters in the
instrument. In general, calculated values are values
derived from actual measurements.
:CALCulate:DATA? {POWer | FREQuency |
WAVelength | WNUMber }
Queries the data resulting from delta and drift
measurements.
:CALCulate:DRIFt[:STATe]?
Queries if DRIFt is to be calculated.
:CALCulate:DRIFt[:STATe] { ON | OFF }
Selects DRIFt as the quantity to be calculated.
:CALCulate:DRIFt:METHod?
Queries the method used for DRIFt calculation
(either Max-Min, Max, Min, or Diff).
:CALCulate:DRIFt:METHod {STARt | MAXMin
|MAX | MIN}
Selects the method used for DRIFt calculation (either
Max-Min, Max, Min, or Diff).
:CALCulate:DELTa[:STATe]?
Queries if DELTa is to be calculated.
:CALCulate:DELTa[:STATe] { ON | OFF }
Selects DELTa as the quantity to be calculated.
:CALCulate:DELTa:METHod?
Queries the method used for DELTa calculation
(either REF or ITU).
:CALCulate:DELTa:METHod {REF | ITU}
Selects the method used for DELTa calculation
(either REF or ITU).
:CALCulate:DELTa:REF?
Queries the method used as the reference for the
delta calculations.
:CALCulate:DELTa:REFerence {ITU | channel
number}
Selects the signal to be used as the reference for the
delta calculations.
:CALCulate:RESet
Resets the CALCulate subsystem. This command
resets the Elapsed Time counter, sets the Min & Max
values to the Current value, and sets the Start value
to the Current value.
:CALCulate:TIMe[:ELAPsed]?
Returns the time since last power on or reset.
CALC2 Subsystem
These commands set and query the spectral data,
the peak thresholding, and the secondary
calculations e.g. drift, max-min, etc.
:CALCulate2:DATA?
Queries the frequency spectrum of the input signal.
:CALCulate2:PEXCursion?
Queries the peak excursion threshold.
:CALCulate2:PEXCursion
Sets the peak excursion threshold.
:CALCulate2:PTHReshold?
Queries the peak threshold.
:CALCulate2:PTHReshold
Sets the peak threshold.
CALCulate2:THREShold?
Queries the peak threshold type.
:CALCulate2:THREShold {REL | ABS}
Sets the peak threshold type, either relative or
absolute
CALCulate2:WCOE?
Queries the wavelength calibration coefficient.
:CALCulate2:WLIMit[STATe]?
Queries the wavelength limits state ( ON or OFF).