
Considerations When Using the Current Discriminator
Constant
User entry is potentially the least accurate method for determining the
Discriminator Constant.
This calibration method does not verify the accuracy of the Discriminator
Constant. It relies strictly on the user to ensure the validity of the constant
being used. (Keep in mind that the accuracy of the Discriminator Constant
relates directly to the accuracy of the measurement. A Discriminator
Constant accurate to within ±1 dB will guarantee a measurement accuracy
of ±2 dB.)
An accuracy degradation may be acceptable when only the relative shape
of a device's noise characteristics is important rather than the absolute
noise level. In this case, only a crude approximation of the Discriminator
Constant is necessary.
The Discriminator Constant calibration of the delay line discriminator is
valid only to ^.
Calibr Process: $N w/FM Discriminator 2-79
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