Exfo FTB -5240S/5240BP Optical Spectrum Analyzer Manual de usuario Pagina 600

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SCPI Command Reference
594 FTB-5240S/S-P/BP
Product-Specific Commands—Description
:UNIT[1..n]:RATio
Description This command selects a default unit for
commands which program relative power.
At *RST, default relative power unit is set to DB.
Syntax :UNIT[1..n]:RATio<wsp>DB|W/W|PCT
Parameter(s) Unit:
The program data syntax for the first parameter is
defined as a <CHARACTER PROGRAM DATA>
element. The allowed <CHARACTER PROGRAM
DATA> elements for this parameter are:
DB|W/W|PCT.
The parameter corresponds to the newly
selected default relative power unit.
DB: selects dB power unit.
W/W: selects watt ratio power unit.
PCT: selects percent power unit
Example(s) UNIT:POW W
UNIT:POW? Returns W
UNIT:RAT DB
UNIT:RAT? Returns DB
UNIT:POW? Returns DBM
Notes Changing default relative power unit also sets the
default absolute power unit (UNIT:POWer) to the
corresponding setting.
See Also :UNIT[1..n]:POWer
:UNIT[1..n]:SPECtrum
:UNIT[1..n]:RATio?
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