Ametek 7124 Instruction Manual page 162

Precision lock-in amplifier
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Chapter 6, COMPUTER OPERATION
AXO
EX [n]
6-16
n
Selection
1
0
Disables offset facility
1
Enables offset facility
The range of n
is ±30000 corresponding to ±300% full-scale.
2
Auto-Offset
The X and Y channel output offsets are turned on and set to levels giving zero X and
Y channel outputs. Any changes in the input signal then appear as changes about
zero in the outputs.
Output expansion control
Expands X and/or Y channel outputs by a factor of 10. Changes bar-graphs, analog
outputs full-scale to ±100% if X or Y selected. The value of n has the following
significance:
n
Expand mode
0
Off
1
Expand X
2
Expand Y
3
Expand X and Y

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