Keysight Technologies 86120B, User Manual

Page: 204 / 273

202
Programming Commands
SENSe Subsystem
CORRection:DEVice
Selects the wavelength measurement algorithm. This command applies to
Keysight 86120B instruments with firmware version number 2.0. When first turned
on, the instrument briefly displays the firmware version. Instruments with a firm-
ware version number less than 2.0 do not have this feature.
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:
NARR
ow
*RST sets this value to NARRow.
SCPI Compliance: instrument specific
Description The narrow bandwidth algorithm, used for measuring lasers, determines the wave-
length based upon the peak.
The broad bandwidth algorithm, used for LEDs, filters, and chirped lasers, deter-
mines 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 espe-
cially true when measuring devices with sloping noise floors, like an EDFA ampli-
fier. For more information on peak excursion,
refer to “PEXCursion” on page 164 .
Instrument specifications apply when the device is set to
NARR
ow. Specifications
do not apply in
BRO
ad mode.
Query Response The query form returns the previously selected device.
NARR
ow