The Model 2025 Automatic Fine Tuning (AFT) Research
Amplifier represents the latest in spectroscopy amplifier
design and includes all the features associated with a
research grade signal processor: differential inputs for
common mode noise rejection, wide gain range with Super
Fine Gain (SFG) control, choice of semi-Gaussian or
semi-triangular pulse shaping to meet most detector applications
and requirements, a flexible Baseline Restorer
and an integral Pileup Rejector and Live Time Corrector.
Although some of these features are available in other
amplifiers, the Model 2025 goes a step further with
Automatic Fine Tuning (AFT) which makes the unit
easy to set up and use. With the AFT circuit activated,
critical performance adjustments are automatically optimized
eliminating the subjectiveness and guesswork
normally associated with manual fine tuning. The results
are consistent and repeatable, and nearly operator
independent.
With the Model 2025 there is no need for an oscilloscope
to optimize pole/zero (P/Z) matching. The operator
simply starts the optimization process by pressing
the AUTO SET button. The BUSY LED lights and the P/Z matching circuit
begins converging on the optimal setting required for good high count rate
resolution, peak stability and overload recovery. When the process is complete
the BUSY LED turns off.
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