584 constant score discriminator

Input

accept0 Vto-5 Vnegative input signal without saturation; DC coupling;Z_in =50 Ω；t_r≤ 2 nsWhen, reflection≤±5％。

threshold range

-5 mVto-1 V。

threshold integral nonlinearity

≤±0.25% full scale.

threshold instability

≤±100μV/°C，0to50°C。

delay

nominal25 ns, externalCFDelay≈2 ns。

Minimum pulse pair resolution

≤20 ns。

dead time

nominal20 nsor blocking output width, whichever is greater.

Block output width

Available in ≤10to ≥1000 nsAdjust within the range.

time travel

For from-20 mVArrive-2 Vof100:1Input range, ≤±100 ps. Condition: externalCFdelay= 2 ns;Input rise time ≤1 ns;Input pulse width= 10 ns。

threshold

front panel10A precision locking potentiometer is used to determine the discriminator threshold setting, ranging from-5 mVto-1 V。

Timing mode switch

front panel3A bit lock toggle switch selects between three timing modes:
• CF(constant fraction) The attenuation coefficient is internally set tof = 0.2(Can be changed upon request). Must be a constant fractional shaping delay (CFdelay) provides external50Ω coaxial cable.
• SRT(Slow rise time) Reject Provides constant fractional timing and inhibits the output signal produced by the leading edge timing of the leading edge arming discriminator. Input signals that do not exceed the discriminator threshold before a constant fractional zero-crossing time do not produce an output pulse.

LE(Frontier)

Suppress timing of constant fractional circuits. Timing is derived when the leading edge of the input signal exceeds the discriminator threshold level.

CFdelay

two front panelsBNCConnector accepts50Ω coaxial cable, available asCFandSRTConstant fractional shaping delay required for mode setup: total delay is ≈0.8 nsPlus the delay of the external cable. inLEmode, the user can connect a50Ω coaxial cable, or separate one50Termination resistors of Ω are connected to both connectors.

swim

via front panel20Turn screwdriver adjustments allow play compensation to be set for each application.

CF Mon

front panelBNCConnector allows observation of constant fractional bipolar timing signals;Z_o =50Ω. need50Ω coaxial cable; recommended50Ω termination resistor.

Width

via front panel20Turn screwdriver adjustment to set the width of the blocked output pulse. From ≤10to ≥1000 nsMake changes. is greater than the nominal20 nsThe width sets the instrument dead time.

Gate control mode switch

rear panel2Bit lock toggle switch controls door input usage. (PWBJumpers select one of three gate input signal paths. )
• Gating A "true" logic level from the selected gate input allows the discriminator to produce an output signal. A "false" logic level from the selected gate input inhibits the discriminator from producing an output signal. An ongoing set of output signals cannot be prematurely terminated by a logical "false" signal from the selected gate input.
• Ungated The signal level at the selected gate input does not inhibit the discriminator from producing a normal output signal (i.e., the discriminator is always enabled).

logic current switch

rear panel2Position lock toggle switch optional-6 Vor-12 V NIMpower cord for the high speed used in the discriminatorECLLogic provides the current.
Note:
（1) when usingNIM VClass power supply or equivalent power supply-6 Vposition when the module is in a singleNIMwidth of the current distribution range.
（2) when using-12 Vposition when the module exceeds-12 Vsingle on power supplyNIMwide current distribution range. However, this location allows for use without-6 VUse a discriminator in the power supply box of the power supply.

Gate input jumper (G+、G-orBG）

PWBJumpers select one of three gate input signal paths:
• G+ Select back panelBNCgate input connector to accept slow positiveNIMInput signal level; DC coupling;Z_in>1kΩ。
• G- Select back panelBNCgate input connector to accept fast negativeNIMInput signal level; DC coupling;Z_in =50Ω。
• BG Select the power box door line (NIMPower Connector Module Pinouts36) to accept the slow positiveNIMInput signal level> +2 V;DC coupling;Z_in >1kΩ。

Positive output width (+width)

PWB 4The coil potentiometer can adjust the slow speed to positiveNIMThe width of the output signal is set to ≤0.5to ≥2.5μswithin the range.

Positive output signal polarity (POorPO）

PWBJumper can select slow positiveNIMoutput signal (PO) or compensated output signal (PO）。

Input

front panelBNCConnector acceptable0 Vto-5 Vnegative input signal without saturation; DC coupling;Z_in =50 Ω；t_r≥ 2 nsWhen, reflection≤±5％。

gate input

rear panelBNCconnector; based onPWBThe gate input jumper accepts input signals.
• G+Jumper position Accepts slow positive for gatingNIMInput signal level; DC coupling;Z_in >1kΩ。
• G-Jumper position Accepts fast negative for gatingNIMInput signal level; DC coupling;Z_in = 50Ω。

Timing

two front panelsBNCThe connector provides bothNIMStandard fast negative logic signal;t_r≈2 ns；t_f≈3 ns；t_w≈5 ns。

BK Out

front panelBNCThe connector provides simultaneousNIMStandard fast negative logic pulse; width adjustable via front panel from ≤10to ≥1000 nsmake adjustments;t_r ≅2 ns。

Right

front panelBNCThe connector provides simultaneousNIMStandard slow positive logic pulse;Z_o <10Ω; width can passPWBWidth from ≤0.5to ≥2.5 μsMake adjustments. Each positive output pulse will trigger the associatedLEDapprox.3 ms(updated).

Required power supply

logic current switch*

*See "Remarks" on the logic current switch, "Controls" section in the specifications.

weight

Net weight 1.2Kilogram (2.6pounds).Shipping weight 2.25Kilogram (5.0pounds)

Size

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

Model

Description

584

constant score discriminator