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PTU-1 Programmable trigger unit


  • for exact triggering of ballistic measurement and recording instruments (high-speed camera, flash units, radar etc.)
  • triggering by acoustic signal or external voltage signal with programmable delay
  • real-time calculation of trigger time of photographic equipments based on current velocity
  • simple velocity measurement with conjunction of optical light gates
  • two voltage inputs with programmable threshold, polarity and minimal trigger pulse width
  • trigger output with programmable level, polarity and pulse width
  • built-in microphone with programmable threshold
  • programmable velocity limits and base of light gates
  • simple control using four buttons and built-in LCD display
  • battery powered portable equipment
  • connector for external power supply

Technical parameters

Voltage inputs

Maximal voltage ± 10 V
Treshold 0,1 - 2,0 žž*
Minimal pulse width 0,5 - 1000 μs *ž
Impedance 10 kΩ

Trigger output

Voltage level 0,1 - 2,7 V *ž
Pulse width 0,1 - 10,0 ms ž*
Impedance 50 Ω
Acoustic treshold 80 - 130 dB
Time interval range 100 μs - 10 s
Time resolution 125 ns
Battery 2 x 1,5 V, AAA, 1050 mAh
Operation time on battery 80 h

* programmable parameter