550A Single Channel Analyzer

• Ideal for selecting a range of pulse amplitudes from a spectroscopy amplifier for counting on a ratemeter or counter/timer
• Provides the excellent stability, resolution, and dynamic range demanded by high-resolution detectors
• Four operating modes:
  Integral
  Normal (independent upper and lower levels)
  Asymmetric window
  Symmetric window
• DC-coupled for high counting rates
• SCA output generated when the input signal falls below the lower level

The ORTEC Model 550A Single-Channel Analyzer is ideally suited for selecting a range of output pulse amplitudes from a spectroscopy amplifier for subsequent counting on a ratemeter or a counter/timer. It provides the excellent stability, resolution, and dynamic range needed for measurements with high-resolution germanium and silicon detectors. These same features provide more than adequate performance with scintillation counters, proportional counters, and ionization chambers. The entire instrument is dc-coupled to ensure that the discriminator levels are not affected by changes in the counting rate, even at very high counting rates.