4 – 16
Remote Operation
4.4.10
Auto commands
The following commands all cause the SR124 to perform a series
of intermal measurements and adjustments. See section 3.5 for a
discussion of how much time these functions may require.
Auto gain
AGAN(?) [
z
]
Set (query) the auto gain function
{
to
z
=
(
OFF 0
,
ON 1
)
}
. Setting
AGAN
with no parameter will initiate an auto gain cycle, and is equivalent
to
AGAN
1
.
The set version of
AGAN
can initiate an auto gain cycle by com-
manding
AGAN
to
ON
(
1
). If a currently-executing auto gain must be
cancelled in-progress, send the command
AGAN
OFF
.
Quering
AGAN
will respond with one of the following 5 token values:
z
value
Definition
OFF 0
Auto gain not running
ON 1
Auto gain adjust in progress
NOTREADY 2
Not currently possible to start
SUCCESS 3
Auto gain cycle concluded successfully
FAILED 4
Auto gain cycle failed
Auto phase
APHS(?)
{
z
}
Set (query) the auto phase function
{
to
z
=
(
OFF 0
,
ON 1
)
}
. Setting
APHS
with no parameter will initiate an auto phase cycle, and is
equivalent to
APHS
1
.
The set version of
APHS
can initiate an auto phase cycle by com-
manding
APHS
to
ON
(
1
). If a currently-executing auto phase must
be cancelled in-progress, send the command
APHS
OFF
.
Quering
APHS
will respond with one of the same 5 tokens as de-
scribed above, for
AGAN
.
Auto o
ff
set
AOFF(?)
{
z
}
Set (query) the auto o
ff
set function
{
to
z
=
(
OFF 0
,
ON 1
)
}
. Setting
AOFF
with no parameter will initiate an auto o
ff
set cycle, and is
equivalent to
AOFF
1
.
The set version of
AOFF
can initiate an auto o
ff
set cycle by com-
manding
AOFF
to
ON
(
1
). If a currently-executing auto o
ff
set must be
cancelled in-progress, send the command
AOFF
OFF
.
The
AOFF
command can be executed independent of the
OFFO
state (whether the o
ff
set is enabled or not). The command
AOFF
1
measures the current value of the output, and adjusts the
OFST
parameter to best null the output voltage.
SR124
Analog Lock-In Amplifier
