EXFO FTB -5240S/5240BP Optical Spectrum Analyzer for FTB 500 (NS-1434) - Инструкция (Страница 537)

Справка по командам SCPI
OSA 531
Product-Specific Commands—Description
:CALCulate[1..n][:WDM]:DATA:CHANnel:
OSNR?
Description This query returns computed WDM analysis result
for signal-to-noise ratio of the selected channel.
At *RST, this value is not available.
Syntax :CALCulate[1..n][:WDM]:DATA:CHANnel:OSNR?
Parameter(s) None
Response Syntax <Osnr>
Response(s) Osnr:
The response data syntax for <Osnr> is defined
as a <NR3 NUMERIC RESPONSE DATA>
element.
The <Osnr> response corresponds to the
computed signal-to-noise ratio.
Example(s) CALC:CHAN:DEL:ALL
CALC:CHAN:DEF "ITU_017", 203.8950 THZ
CALC:CHAN:SEL "ITU_017"
CALC:CHAN:SIGP:TYPE IPOW
CALC:CHAN:NOIS:AUTO OFF
CALC:CHAN:NOIS:TYPE IEC
<Do measurement>