Minimum Pulse Amplitude and Duration Requirements

For all Time Tagger models, we specify a minimum input signal amplitude of 100 mV. The minimum pulse duration requirements are as follows:

  • Time Tagger X: 350 ps
  • Time Tagger Ultra: 500 ps
  • Time Tagger 20: 1 ns

While these values provide a useful baseline, it is important to consider a few additional factors, as reducing specifications to single numbers does not tell the full story:

  1. When the trigger level is properly selected and the system is correctly set up, these specifications guarantee a 100% count rate and a time jitter below the specified value for each model.
  2. Shorter or smaller pulses can still be detected, but this may result in:
    • A count rate below 100% (missed events).
    • Time jitter exceeding the specified values.
  3. These specifications for amplitude and duration are interdependent:
    • Shorter pulses might still work if their amplitude is higher than 100 mV, while meeting jitter specifications and avoiding missed events.
    • Conversely, longer pulses with an amplitude slightly below 100 mV may also function correctly.

By carefully tuning your setup, you can optimize the performance of your Time Tagger, even when operating near the specified limits.

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