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579 Fast-Filter AmplifierSpecificationsPERFORMANCE Input Signal Amplitude Range ±1 V ac, ±5 V ac with X5 internal attenuator; ±35 V dc; input impedance 100 W, ac-coupled; 50 W optional. Output Amplitude Range 0 to ±5 V linear into a 50-W load. Rise Time <8 ns with Integrate and Differentiate Out, or @2.2 ti for other integrate settings and Differentiate Out. Overshoot <10% with Integrate Out, or <2% for any selected integration. Noise For maximum gain, rms noise referred to the input is <10 µV (typically 5 µV), with ti = tD = 200 ns, measured with an HP3400A true rms voltmeter. Wideband (200 MHz) noise for ti = tD = Out is <50 µV (typically 40 µV). Integral Nonlinearity <±1% (typically 0.5%) over ±5 V range into 50-W load.
Temperature Instability Operating Temperature Range 0 to 50°C. ELECTRICAL AND MECHANICAL Power Required +24 V, 80 mA; –24 V, 80 mA; +12 V, 160 mA; –12 V, 140 mA.
Weight Dimensions Standard single-width NIM module 3.43 X 22.13 cm (1.35 X 8.714 in.) per DOE/ER-0457T. CONTROLS COARSE GAIN Front-panel 6-position switch to select X15, X25, X50, X125, X250, and X500 gain factor. When internal X5 attenuator is used, the coarse gain factors represent X3, X5, X10, X25, X50, and X100, respectively. A continuously variable voltage gain of X0.9 to X500 can be obtained. (Gain reduced by factor of two when cable clip is used.) FINE GAIN Front-panel single-turn potentiometer, continuously adjustable from 0.3 to 1.0. P/Z Front-panel screwdriver adjustable potentiometer to adjust pole-zero cancellation for decay time constants from 25 µs to infinity. DIFF Front-panel 7-position switch selects a differentiation time constant to control the decay time of the pulse. Decay time @2.2 tD with ti = Out. The tD settings include Out, 10, 20, 50, 100, 200, and 500 ns. INT Front-panel 7-position switch selects an integration time constant to control the rise time of the output pulse. The rise time is @2.2 ti with tD = Out. The ti settings include Out, 10, 20, 50, 100, 200, and 500 ns. Rise time in the Out position is <5 ns, equivalent to a ti <2.3 ns. INV/NONINV Front-panel locking toggle switch selects inversion or noninversion of the input signal. BLR ADJ Front-panel screwdriver adjustment to set the Gated BLR threshold from ±50 mV to ±500 mV referred to the output. BLR GATED/UNGATED Printed wiring board (PWB) jumper selects gated or ungated BLR operation. Factory-set in gated position. BLR LED This feature enables the user to quickly adjust the BLR threshold setting near the noise peak. Front-panel LED indicates an output amplitude has exceeded the BLR threshold. The BLR LED can be used as a visual indicator of the output counting rate. COUNT RATE ATTENUATOR PWB jumper select to pass with unity Gain or Attenuate by a factor of 5. Jumper select B to C and A to F will pass with unity Gain. Jumper select C to D and E to F will attenuate by a factor of 5. Factory-set at unity Gain. INPUTS INPUT Front-panel BNC accepts input signals of either polarity. ±1.0 V ac or ±5.0 V ac with X5 attenuator. Maximum dc voltage ±35 V. Input impedance 100 W (to match preamplifiers), ac-coupled. CLIP Two front-panel BNC connectors to provide delay line clipping of the input pulse. Cable impedance must be 50 W. Delay line clip is 2X the cable propagation delay. Gain is reduced by factor of 2 when using cable clip. OUTPUTS OUTPUT Front-panel BNC connector furnishes the amplified and shaped signal through Zo <1 W. Amplitude 0 to ±5 V into 50 W; rise time and decay time constants controlled by the integrate and differentiate filter settings. BUSY Rear-panel BNC furnishes NIM-standard positive logic signal during the BLR busy time. PREAMP POWER Rear-panel standard ORTEC power connector, Amphenol type 17-80090-15. ORDERING INFORMATION
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