Stanford Research Systems SR865A, Operation Manual

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Chapter 4 Programming 117
SR865A DSP Lock-in Amplifier
Auto Function Commands
APHS
The APHS command performs the Auto Phase function. This command is the same as
pressing the [Auto Phase] key. The outputs may take many time constants to reach their
new values. Do not send the command again without waiting the appropriate amount of
time.
ARNG
The ARNG command performs the Auto Range function. This command is the same as
pressing the [Auto Range] key. The outputs may take many time constants to return to
their steady state values.
ASCL
The ASCL command performs the Auto Scale function. This command is the same as
pressing the [Auto Scale] key. This automatically sets the sensitivity. Measurements with
the synchronous filter on or measurements of Xnoise or Ynoise may take many time
constants to return to their steady state values.