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416A Gate and Delay Generator

ORTEC 416A Gate and Delay Generator
  • Provides adjustment of the delay, width, polarity, and amplitude of gating pulses
  • Positive or negative polarity input pulse
  • Time delay from 0.1 to 110 µs
  • Output pulse width from 0.4 to 4 µs
  • Excellent time delay stability

The ORTEC Model 416A Gate and Delay Generator accepts either polarity of input logic pulse, provides a delay of up to 110 µs, and furnishes an output logic pulse with selected amplitude, polarity, and width.
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  • More Information +

    The combination of functions provided by this module satisfies various logic requirements, such as gating multichannel analyzers and alignment of coincidence timing between two channels using dissimilar pulse-shaping modes. Auxiliary outputs include a Delay Period output, with a width equal to the delay time, and a NIM-standard Fast-negative Delayed Marker pulse. Excellent time stability allows application in systems that require nanosecond time precision.

    Instruments producing either positive or negative NIM-standard logic signals may be used to drive the Model 416A. Because of the versatility of its amplitude and width adjustments and its dual-polarity output connections, the output can be set for compatibility with essentially all nuclear instrumentation. It can also be used as a logical interface between ORTEC equipment and any other instruments.
  • Specifications +

    Delay Nonlinearity
    Delay Temperature Instability ≤±0.03% of adjusted Delay per °C.
    Delay Generator Dead Time Adjusted Delay plus 200 ns on 1.1-µs range, 300 ns on 11-µs range, and 1 µs on 110-µs range.
    Output Generator Dead Time Adjusted Width plus 0.2 µs.
    Delay Jitter ≤0.02% of selected range.


    Delay 10-turn locking potentiometer with direct-reading duo-dial for continuous adjustment within the range selected by the locking 3-position toggle switch:
    • 1.1 µs  Selects the range of 0.1 to 1.1 µs for the Delay potentiometer.
    • 11 µs   Selects a 1 to 11 µs range.
    • 110 µs  Selects a 10 to 110 µs range.
    Amplitude Front-panel screwdriver control, permits the output pulse amplitude to be adjusted within the range of 2 to 10 V, both polarities (i.e., +2 to +10 V and –2 to –10 V).
    Width Front-panel screwdriver control permits the width of output pulses to be adjusted within the range of 400 ns to 4 µs.


    POS Front- and rear-panel BNC connectors; +2 V pulse minimum, 12 V maximum; 100-ns minimum width, dc-coupled; impedance 1000 Ω.
    NEG Front-panel BNC connector accepts NIM-standard fast negative logic pulses; –250 mV pulse minimum; 5 ns minimum width, dc-coupled; impedance 50 Ω.

    Delayed Out,
    Front- and rear-panel BNC connectors, with test points, provide simultaneous output pulses with identical characteristics except for opposite polarity; impedance ≤10 Ω.
    Delayed Period Rear-panel BNC connector, with test point, provides positive pulse width equal to the adjusted Delay; amplitude +5 V; rise time ≤50 ns; impedance ≤10 Ω.
    Dly'd Marker Front-panel BNC connector, with test point, provides NIM-standard fast negative logic pulse at the end of delay time. Amplitude, –0.6 V into 50 Ω load; rise time ≤10 ns;  width ≤25 ns; impedance ≤10 Ω.

    Electrical and Mechanical
    The Model 416A derives its power from a standard NIM bin/power supply. The power required is +24 V, 60 mA; –24 V, 60 mA; +12 V, 85 mA; and –12 V, 85 mA.
    Weight Net  1.3 kg (2.8 lb).    Shipping  2.2 kg (4.8 lb).
    Dimensions NIM-standard single-width module 3.43 X 22.13 cm (1.35 X 8.714 in.) per DOE/ER-0457T.
  • Ordering Information +

    Model Description
    416A Gate and Delay Generator