Stanford Research Systems SR844 User Manual page 118

4-16 Display and Output
AOFF ch,q
DEXP(?)
ch,q{,i}
SR844 RF Lock-In Amplifier
Specifying any other quantity in the offset commands will result in an error.
Important!
Setting an offset to 0 turns that offset off. Setting an offset to a non-zero value sets
the offset value and turns the offset on.
Remember, X and Y offsets turn on and off together. Always set both X and Y
offsets together making sure that the second offset which is set is non-zero.
Querying the offset of a quantity that has offset turned off will return zero.
The AOFF ch,q command automatically offsets the chosen quantity to zero. The
quantity is specified by its display channel ch and quantity q as per the table
above. Both parameters ch and q are required. This command is equivalent to
pressing the Auto Offset key.
Important!
Remember, Auto Offset X or Y performs Auto Offset on both X and Y.
The DEXP command sets or queries the output Expand of the display quantity
specified by ch,q (see table above). The parameter i specifies No Expand (0),
×10 (1) or ×100 (2).
The following quantities may be expanded: X, R[V], R[dBm], Xnoise, Y,
Ynoise [Volts]. Specifying any other quantity in the DEXP command will result in
an error.
θ
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