EXFO IQS-3150 Variable Attenuator for IQS-500/600 - Manual (Page 109)

SCPI Command Reference
Variable Attenuator 103
Product-Specific Commands—Description
DEFault allows the instrument to select a value
for the <RelativeAttenuation> parameter.
The <RelativeAttenuation> parameter is a valid
relative attenuation value. You can use the
INPut[1..n]:RATTenuation? MAX and
INPut[1..n]:RATTenuation? MIN queries to
determine a valid range for the attenuation.
a) In ABSolute mode, <RelativeAttenuation> =
absolute attenuation + offset value.
b) In REFerence mode, <RelativeAttenuation>
= absolute attenuation – reference value + offset
value.
c) In XB mode (dB), <RelativeAttenuation> =
absolute attenuation + correction factor
(wavelength-specific) + offset value.
d) In XB mode (dBm), <RelativeAttenuation> =
(absolute attenuation *–1) + input power
(wavelength-specific) + offset value.
Example(s) INP:WAV 1310 NM
CONT:MODE ATT
OUTP:APM ABS
INP:OFFS 1.000 DB
INP:RATT 15.355 DB
:INPut[1..n]:RATTenuation