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474 timing filter amplifier

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474 timing filter amplifier

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Brief description:Timing with germanium detector Spectral measurements at ultra-high count rates Optional filters for pulse shaping Optimization of signal-to-noise ratio Continuously adjustable gain, X2 to

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Detailed introduction

ORTEC 474 Timing Filter Amplifier
  • Timing using a germanium detector
  • Energy spectrum measurements at ultra-high count rates
  • Optional filters for pulse shaping
  • Signal-to-noise ratio optimization
  • Continuously adjustable gain, X2 to X250
  • extreme zero cancellation
  • DC coupled

The ORTEC Model 474 Timing Filter Amplifier is designed to shape pulses and also optimize the signal-to-noise ratio of timing measurements. The Model 474 is particularly suitable for use with ORTEC constant fraction timing discriminators in timing applications with germanium or silicon charged particle detectors. It derives the input signal directly from the preamp output.
  • information +

    • Download link 474 Brochure
    • Download link 474 Brochure (A4)
    • Download link 474 Manual
  • More information +


    The Model 474's fast rise time, high output drive, and high gain capabilities make it suitable for other applications such as system timing using low-gain photomultiplier tubes. In addition, pole-zero cancellation circuits, DC coupling, and time-invariant baseline restorers allow for energy spectrum analysis at ultra-high count rates using scintillation detectors and Si charged particle detectors.

    Various input pulse shapes can be filtered as needed for signal processing. The Type 474 combines continuously adjustable gain (X2 to X250) with individually selectable integral (τi) and derivative (τd) time constants for proper pulse shaping, making it ideal for time measurements.

  • Specifications +


    Performance

    Input amplitude range

    0to±1 Vsignal,0to±5 VDC offset; input total ±5 V。

    Output amplitude range

    The load is50 When Ω,0to±5 V。

    noise

    For gain, the input-referred rms noise is ≤10 μV, where τi= τd= 200 nsor ≤50 μV(filterout); useHewlett-Packard 3400ATrue RMS instrument measurement.

    rise time

    For filtersOut,≤10ns, other options are~2.2 τi。

    nonlinear

    in ±5 VMid-band within the range ≤±0.05%。

    temperature instability

    The DC level is referred to the output terminal ≤±25 μV/°C。
    Gain≤±0.06%/°C。
    0
    to50°CRange specifications.


    control

    Coarse gain adjustment

    front panel6Bit switches are used to selectX1、X2、X4、X6、X10orX20。

    Fine-tune gain

    Front panel single turn potentiometer fromX2ArriveX12.5Continuous adjustment.

    Extreme zero adjustment

    Front panel screwdriver adjustment to compensate for preamp decay time constant.

    time constant

    The two on the front panel6Bit switch:
    • PointsRCTime constant:Out(equivalent to4 ns)、20、50、100、200and500 ns。
    • DifferentialRCTime constant:Out(equivalent to0.2 ms)、20、50、100、200and500 ns。
    NOTE: ByOutThe position is differentiated and integrated, and the passband is1 kHzto35 MHz。

    NotINV/INV

    Selects inverted or non-inverted input signal.













    Input

    Positive or negative polarity selectable via front panel switch; amplitude0to±1 V; in1 sinternally integrated10% duty cycle, is protected to ±6 V dcand±100 V;Impedance100Ω, DC coupled; front panelBNCconnector. Accept ±5 VDC offset, input (signal plus offset) limited to ±5 V。





    Output

    Output

    front panelBNCconnector. Amplitude0to±5 V;For filterout, rise time ≤10 ns(For other filter selections, this is2.2 τi). impedance<1 Ω, DC coupled.

    Preamp power supply

    rear panel standardORTECpower connector,Amphenol 17-10090。







    electrical and mechanical

    Required power supply

    +24 V, 65 mA; –24 V, 45 mA; +12 V, 160 mA; –12 V, 180 mA。

    weight

    Net weight 1.0Kilogram (2.4pounds). Shipping weight 2.5Kilogram (5.4pounds).

    Size

    NIMStandard single width module,3.43 x 22.13cm (1.35 x 8.714inches), consistent withDOE/ER-0457Trequirements.









  • Ordering information +


    Model

    Description

    474

    Timing filter amplifier

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