China Electronics Technology Instruments AV3672 Series, Руководство пользователя

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6 Measurement Optimization
6.8 Improvement of Measurement Stability
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Fig. 6.18 Setting of Number of Sweep Points
2) Optimization of measurement results
One measurement includes several interdependent settings. You can modify the settings to achieve the purposes of
measurement application: faster throughput or more accurate data. You can balance the settings to optimize
measurement.
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Increase the measurement throughput.
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Improve the measurement accuracy.
6.8 Improvement of Measurement Stability
Measurement instability is caused under several conditions. For repeated measurement, you can apply several
methods to create a stable measurement environment. The following factors have adverse effects on the
measurement accuracy.
1) Frequency offset
The frequency precision of the analyzer depends on the accuracy of the internal 10MHZ oscillator. If high
frequency accuracy and stability are required in the measurement application, no consideration should be given to
the internal frequency standard, and a high-stability external frequency source can be created by the 10MHz
reference input connector on the rear panel.
2) Temperature deviation
a) The electrical characteristics of the following components can be changed as a result of thermal expansion and
contraction.
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Internal device of analyzer
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Standard of calibration kit
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Tester
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Cable
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Adapter
b) The temperature deviation in measurement can be reduced in the following methods.
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Apply a temperature-controlled environment.