Output And Offset - Stanford Research Systems SR850 User Manual

Dsp lock-in amplifier
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OUTPUT and OFFSET COMMANDS
FOUT (?) i {, j}
OEXP (?) i {, x, j}
AOFF i
The FOUT command sets or queries the front panel (CH1 and CH2)
output sources. The parameter i selects CH1 (i=1) or CH2 (i=2) and is
required. The FOUT i, j command sets output i to quantity j where j is
listed below. The definition of j is different for the two outputs.
CH1 (i=1)
j
output quantity
0
X
1
R
2
3
Trace 1
4
Trace 2
5
Trace 3
6
Trace 4
The OEXP command sets or queries the output offsets and expands.
The parameter i selects X (i=1), Y (i=2) or R (i=3) and is required. The
parameter x is the offset in percent (-105.00
expand (1
j
256). The OEXP i, x, j command will set the offset and
expand for quantity i. This command requires BOTH x and j. The OEXP?
i command queries the offset and expand of quantity i. The returned
string contains both the offset and expand separated by a comma. For
example, if the OEXP? 2 command returns "50.00,10" then the Y offset
is 50.00% and Y expand is 10.
The AOFF i command automatically offsets X (i=1), Y (i=2) or R (i=3) to
zero. The parameter i is required. This command is equivalent to press-
ing the Auto softkey in the Offset & Expand menu box.
6-9
Remote Programming
CH2 (i=2)
j
output quantity
0
Y
1
R
2
3
Trace 1
4
Trace 2
5
Trace 3
6
Trace 4
x
105.00) and j is the

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