EXFO FTB -5240S/5240BP Optical Spectrum Analyzer - Manual (Page 485)

SCPI Command Reference
OSA 479
Product-Specific Commands—Description
:CALCulate[1..n][:WDM]:DATA:CHANnel:
NOISe?
Description This query returns computed WDM analysis
result for noise power level of the selected
channel.
At *RST, this value is not available.
Syntax :CALCulate[1..n][:WDM]:DATA:CHANnel:NOISe?
Parameter(s) None
Response Syntax <Noise>
Response(s) Noise:
The response data syntax for <Noise> is defined
as a <NR3 NUMERIC RESPONSE DATA>
element.
The <Noise> response corresponds to the
computed noise power level.
Example(s) CALC:CHAN:DEL:ALL
CALC:CHAN:DEF "CWDM_03", 1615.000 NM
CALC:CHAN:SEL "CWDM_03"
CALC:CHAN:SIGP:TYPE IPOW
CALC:CHAN:NOIS:AUTO OFF
CALC:CHAN:NOIS:TYPE IEC
<Do measurement>