Stanford Research Systems SR865A, Operation Manual

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Chapter 4 Programming 115
SR865A DSP Lock-in Amplifier
CRAT(?) [ X | Y | R | j ] { , OFF | ON | i }
The CRAT j, i command turns the ratio function for X (j=0), Y (j=1), or R (j=2) to off
(i=0) or on (i=1). Setting an ratio for phase is not allowed.
The ratio function for X and Y are tied to aux input voltage 3, following the equation
V 10 Expand
V 1.000
3 In Aux
Offset
y Sensitivit
orY X
Output
u u
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The ratio function for R is similar, but is tied to aux input voltage 4:
V 10 Expand
V 1.000
4 In Aux
Offset
y Sensitivit
R
Output
u u
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Example
CRAT X, ON Set X ratio mode to on
CRAT 0, 1
CRAT? 0
Returns the X ratio mode
CRAT? X