Stanford Research Systems SR865A, Operation Manual

Page: 132 / 221

114 Programming Chapter 4
SR865A DSP Lock-in Amplifier
CH1/CH2 Output Commands
COUT(?) [ OCH1 | OCH2 | j ] { , XY | RTHeta | i }
The COUT j, i command sets CH1 (j=0) or CH2 ( j=1) to either XY (i=0) or Rθ (i=1).
Example
COUT OCH2, RTHeta Set CH2 to θ
COUT 1, 1
COUT 0, RTH
Set CH1 to R
COUT 0, XY Set CH1 to X
COUT? 1
Returns the CH2 output i
COUT? OCH2
CEXP(?) [ X | Y | R | j ] { , OFF | X10 | X100 | i }
The CEXP j, i command sets the output expand for X (j=0), Y (j=1) or R (j=2) to off
(i=0), X10 (i=1) or X100 (i=2). Setting an expand for phase is not allowed.
Example
CEXP Y, X100 Set Y expand to X100
CEXP 1, 2
CEXP? 1
Returns the Y expand mode i
CEXP? Y
COFA(?) [ X | Y | R | j ] { , OFF | ON | i }
The COFA j, i command turns the output offset for X (j=0), Y (j=1), or R (j=2) to off
(i=0) or on (i=1). Setting an offset for phase is not allowed.
Example
COFA X, ON Set X output offset to on
COFA 0, 1
COFA? 0
Returns the X output offset state i
COFA? X
COFP(?) [ X | Y | R | j ] { , x }
The COFP j, x command sets the output offset percentage for X (j=0), Y (j=1), or R (j=2)
to x percent. The value of x is limited to − 999.99 to +999.99 with 0.01 resolution.
Example
COFP X, 12.34 Set X output offset to 12.34%
COFA 0, 12.34
COFP? 0
Returns the X output offset percentage x
COFP? X
OAUT [ X | Y | R | j ]
The OAUT j command auto offsets X (j=0), Y (j=1), or R (j=2). This is the same as Auto
Offset in the offset keypad display.