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13
component of test signal. The polar display interface is shown in Fig.7. All display modes can simply adjust the display
ratio by hand operation. The auto-adjust function can optimize the display mode rapidly.
X, Y and R Output Offset and Expand
The SE1022 has the ability to offset the X, Y and R outputs, which is useful when measuring deviations in the signal
around some nominal value. The output can be offset to zero by setting the offset. Then changes in the output can be read
directly from the display or output voltages. The offset is specified as a percentage of full scale. Offsets can be set up to
100% of full scale. When the sensitivity is changed, the percentage does not change.
The X, Y and R outputs can be expanded. It's realized by multiplying the output with an expansion factor. Thus, a signal
which is only 10% of full scale can be expanded to provide 10 V rather than 1 V. The general use for expansion is to
increase the measurement resolution around some value which is not zero.
When the output does not exceed the full scale, the SE1022 can expand the output by multiplying with the expansion
factor from 1 to 256. The output with offset and expand is:
)
(
10
)
(
V
Expand
Offset
Sents
Signal
Output
Where <Offset> can be set up to
±
100% by the digital keyboard and the minimal step is 0.01%. <Expand> can be set
from +1 to +256 by the digital keyboard and the minimal step is 1. Related display interface is shown in Fig.8.
For example, there is:
)
(
6
)
(
10
2
)
2
.
0
1
1
.
0
(
V
V
mV
mV
Output
Fig.8 Output Offset and Expand
