EXFO IQS-3150 Variable Attenuator for IQS-500/600 - Manual (Page 113)

SCPI Command Reference
Variable Attenuator 107
Product-Specific Commands—Description
:INPut[1..n]:REFerence
Description This command sets, for the current wavelength,
a reference value for the attenuation. When the
instrument is used in Reference mode, the
attenuation configured with the
INPut[1..n]:RATTenuation command is relative to
this reference value. This command will have no
effect when the instrument is used in Absolute or
X + B mode. This value it used only when the
ATTenuation control mode is active.
At *RST, the reference value that will be set
depends on the instrument you have.
Syntax :INPut[1..n]:REFerence<wsp><Reference
[<wsp>DB]>|MAXimum|MINimum|DEFault
Parameter(s) Reference:
The program data syntax for <Reference> is
defined as a <numeric_value> element
followed by an optional <SUFFIX PROGRAM
DATA> element. The allowed <SUFFIX
PROGRAM DATA> element is DB. The
<Reference> special forms MINimum,
MAXimum and DEFault are accepted on input.
MINimum allows to set the instrument to the
lowest supported value.
MAXimum allows to set the instrument to the
highest supported value.
DEFault allows the instrument to select a value
for the <Reference> parameter.
The <Reference> parameter represents the new
reference value.