Auto Commands - Stanford Research Systems SR124 Operation And Service Manual

4 – 16

4.4.10 Auto commands

AGAN(?) [z]
APHS(?) z
AOFF(?) z
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
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
Auto gain not running
OFF 0
Auto gain adjust in progress
ON 1
Not currently possible to start
NOTREADY 2
Auto gain cycle concluded successfully
SUCCESS 3
FAILED 4 Auto gain cycle failed
Auto phase
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 set
Set (query) the auto o set function to z (OFF 0, ON 1) . Setting
AOFF with no parameter will initiate an auto o set cycle, and is
equivalent to AOFF 1.
The set version of AOFF can initiate an auto o set cycle by com-
manding AOFF to ON (1). If a currently-executing auto o 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 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.
Remote Operation
SR124 Analog Lock-In Amplifier