Features

• Automatic fine tuning of
  critical parameters: Pole/Zero Matching, BLR Rate, BLR
  Threshold, PUR Threshold
• Gaussian and triangular
  shaping
• Differential input
• Front panel common mode
  balance control
• Super Fine Gain (SFG) control
• Pileup rejector and live time
  corrector
• Automatic reset preamplifier
  mode

Description

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.