Linearity Check
Integral nonlinearity is a measure, expressed in percentage, of maximum deviation
when a straight line is compared to an OUTPUT versus input plot. The OUTPUT is
exercised over its full dynamic range. A test for nonlinearity can be conducted using
the resistive summing network shown in Figure 20.
The test is performed by first adjusting the amplifier gain, polarity and pulser attenua-
tion so that a negative ten volt (NORMAL) pulser OUTPUT produces a positive 10
volt amplifier OUTPUT. The pulser NORMAL OUTPUT should be –10 volts coinci-
dent with the amplifier OUTPUT peak. Next, while observing the summing point on
the oscilloscope, the amplifier fine gain is carefully adjusted to bring the vertical gain
should be set to obtain the desired resolution.
Note:
The Model 1407 must be modified for a 20 V OUTPUT for this test.
When this condition is obtained, turn the 1407 PULSE HEIGHT control downward
from ten volts to the lowest level that will still trigger the oscilloscope, and observe the
maximum difference between the baseline and the null point. The integral nonlinearity
of the amplifier under test is then equal to:
26
Performance Check
Figure 20 Test Setup, Linearity Check
Summary of Contents for 2015A
Page 1: ...Model 2015A Spectroscopy Amplifier Timing SCA User s Manual 9231694B 01 05...
Page 6: ...Notes iv...
Page 12: ...Internal Controls 6 Controls and Connectors Figure 4 Internal Controls...
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