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Programming Commands
SENSe Subsystem
CORRection:DEVice
Selects the wavelength measurement algorithm.
Syntax
:SENSe:CORRection:[DEVice]{?| {NARRow | BROad}}
Constant Description
NARRow Selects wavelength measurements for narrowband devices such
as DFB lasers and modes of FP lasers.
BROad Selects wavelength measurements for broadband devices such
as optical filters and LEDs.
Attribute
Summary
Non-sequential command
Preset State:
NARRow
*RST sets this value to NARRow
SCPI Compliance: instrument specific
Description The narrow bandwidth algorithm, used for measuring lasers, deter-
mines the wavelength based upon the peak.
The broad bandwidth algorithm, used for LEDs, filters, and chirped
lasers, determines the wavelength based upon the center-of-mass of
the power spectrum. The
peak excursion function is used to determine
the value of the integration limits. Care must be taken to ensure that
the integration limits are above any noise. This is especially true when
measuring devices with sloping noise floors, like an EDFA amplifier.
For more information on peak excursion, refer to “PEXCursion” on
page 4- 33.
Instrument specifications apply when the device is set to
NARRow.
Specifications do not apply in
BROad mode.
Query Response The query form returns the previously selected device.
NARRow