579 fast filter amplifier

Input signal amplitude range

UseX5Internal attenuator, ±1 V ac，±5 V ac；±35 V dc;Input impedance100Ω, AC coupling;50Ω is optional.

Output amplitude range

0to±5 Vlinear to50Ω load.

rise time

For integrals and differentialsOut，<8 ns, or for other integral settings and derivativesOut ≅2.2τ_i。

overshoot

For pointsOut，<10%, or for any selected points,<2％。

noise

For gain, the rms noise referred to the input<10 μV(usually5 μV), where τ_i =τ_D =200 ns, useHP3400ATrue rms voltmeter measurement. Τ_i =τ_D =Outof broadband (200 MHz) noise<50 μV(usually40 μV）。

integral nonlinearity

in ±5 Vwithin range50Ω load<±1% (usually0.5％）。

temperature instability

The DC level is referred to the output<±50 μV/°C;Factory setting is ±5 mVWithin.Gain <±0.05％/℃。

Operating temperature range

0to50°C。

Coarse gain adjustment

front panel6bit switch for selectingX15、X25、X50、X125、X250andX500Gain coefficient. When using the internalX5attenuator, the coarse gain coefficients respectively representX3、X5、X10、X25、X50andX100. can be obtainedX0.9toX500Continuously variable voltage gain. (When using cable limiting, the gain is reduced by a factor of two.)

Fine-tune gain

Front panel single turn potentiometer, available from0.3to1.0Continuous adjustment.

P/Z

Front panel screwdriver adjustable potentiometer for25 μsThe decay time constant to ∞ is adjusted for pole-zero cancellation.

DIFF

front panel7A bit switch selects a differential time constant to control the decay time of the pulse. Decay time ≅2.2 τ_D, where τ_i= Out。τ_DSettings includeOut、10、20、50、100、200and500 ns。

INT

front panel7The bit switch selects an integration time constant to control the rise time of the output pulse. The rise time is ≅2.2 τ_i, where τ_D= Out。τ_iSettings includeOut、10、20、50、100、200and500 ns。Outposition rise time<5 ns, equivalent to τ_i<2.3 ns。

INV/NONINV

A front panel locking toggle switch selects inverting or non-inverting of the input signal.

BLR ADJ

Adjustable via front panel screwdriver from ±50 mVto ±500 mV(Referred to the output) Set the gateBLRthreshold.

BLRGating/Ungated

Printed circuit board (PWB) Jumper can select gated or non-gatedBLRoperation. Factory setting is in gated position.

BLR LED

This feature enables the user to quickly adjust theBLRThreshold setting. front panelLEDUsed to indicate that the output amplitude has exceededBLRthreshold.BLR LEDCan be used as a visual indicator of the output count rate.

Count rate

high/low PCBJumpers optionalBLRDead time, the high bit is usually400 ns, the low bit is usually1 μs. Factory setting is low.

attenuator

PWBJumpers selectable for unity gain or attenuation5times passed. Jumper selectionBArriveC，AArriveFwill pass with unity gain. Jumper selectionCtoD，EArriveFwill decay5times. Factory setting is unity gain.

Input

front panelBNCAccepts input signals of either polarity. UseX5attenuator, is ±1.0 V acor ±5.0 V ac. DC voltage ±35 V. Input impedance100Ω (to match preamplifier), AC coupled.

clipping

two front panelsBNCConnector to provide delay line limiting of the input pulses. The cable impedance must be50Ω. Delay line limiting is the cable propagation delay2times. Gain is reduced when using cable limiting2times.

Output

front panelBNCConnector passesZ_o <1Ω provides the amplified and shaped signal. Amplitude0to±5 VArrive50Ω; rise time and decay time constants are controlled by the integral and derivative filter settings.

busy

rear panelBNCinBLRAvailable during busy hoursNIMStandard positive logic signal.

Preamp power supply

rear panel standardORTECpower connector,Amphenoltype17-80090-15。

Required power supply

+24 V, 80 mA; –24 V, 80 mA; +12 V, 160 mA; –12 V, 140 mA。

weight

Net weight 1.5Kilogram (3.3pounds). Shipping weight 3.1Kilogram (7.0pounds).

Size

Standard single widthNIMmodule3.43 X 22.13cm (1.35 X 8.714inches), consistent withDOE/ER-0457Trequirements.

Model

Description

579

fast filter amplifier