SIL761F 16-CHANNEL NIM SHAPING AMPLIFIER

 

(INFN Milano design)

 

 

PROGRAMMABLE AMPLIFICATION AND SHAPING OF FAST DETECTOR SIGNALS

Multiple channel spectroscopy experiments need an economic high performance instrument for amplification and shaping of detector signals. The SIL761F handles 16 inputs in a single, low cost NIM module without sacrificing precision or control options including programmable gain, shaping constants and polarity. Convienent outputs for both analog and timing measurements mean flexible configurations for a variety of experiments.

 

SPECIFICATIONS


Number of Channels: 16.

Coarse Gain Range (computer controlled): 1+128, 3-bit resolution (other values available on request).

Fine Gain (computer controlled): From 0.5 to 1.5 - 8-bit resolution.

Pulse Shaping: Quasi Gaussian.

Shaping Time Constants (computer controlled): 0.5 s, 1 s, 2 s, 3 s (other values on request).

Input Polarity: Positive or negative computer controlled.

Input Range: From 0 to 8 V.

PZ (Pole Zero): Pole zero cancellation circuit, computer controlled, for pole zero adjustment (256 values to match the amplifier tail in the range 50-500 s.

Output Range: From 0 to 8 V for unipolar and x 10 outputs.

Output Polarity: Positive or negative computer controlled.

Output Offset (computer controlled): 128 mV (step 1 mV).

Integral Non-linearity: < 0.03% over the output range from 0 to 8 V for any shaping time.

Noise: < 40 V RMS referred to the input for 3 s shaping and gain of 100.

Gain Temperature Coefficients: < 0.01%/C, 0 to 50C.

DC Level Temperature Coefficients: < 45 V/C, 0 to 50C.

DC Restorer: Active DC restorer.

Fast Timing Amplifier: Rise time < 15 ns. Gain of timing signal is x 10 (other values on request). Maximum output amplitude is 4 V. Polarity is negative.

Count Rate Effect: For a Co60 1.33 MeV gamma peak at 90% of full scale with an incoming rate change from 1 Kcps to 15 Kcps and 2 s shaping time (typical): spectrum shift is < 0.15%.

 

COMPUTER CONTROLS

 

INPUTS

IN1 to IN16: 16 front panel SMB connectors. Each input accepts positive or negative polarity pulses from preamplifier, with rise time from 10 to 800 ns and decay time from 50 to 500 s. Maximum input amplitude is 8 V.

 

LINEAR OUTPUTS

OUT1 to OUT16: One front panel multipin connector.Each output provides unipolar pulses with a full linear range from 0 to 8 V. Output impedance 100 ohm.

OUT1 to OUT16 x 10: One front panel multipin connector. Linear range is 8 V. Output impedance 100 ohm.

MUX OUT: One front panel multipin connector provides a selected unipolar output through analog multiplexer, remotely controlled. The output can be put in high impedance mode in order to allow the selection of both the module and the channel in cascade connection.

 

TIMING OUTPUTS

TOUT1 to TOUT16: One front panel multipin connector provides 16 outputs from the fast timing amplifier. Output impedance 50 ohm.

Timing MUX OUT: One front panel multipin connector provides a selected unipolar output through analog multiplexer, remotely controlled. The output can be put in high impedance mode in order to allow the selection of both the module and the channel in cascade connection.

NOTE: A Model 761F/R is available with rear-panel multipin input connector instead of front panel coaxial SMB connectors.

Power Requirements: 220 mA at +6 V; 100 mA at -6 V; 1.3 A at +12 V; 1.3 A at -12 V.

 

ORDERING INFORMATION

SIL761F - Front-Panel Coaxial SMB Connectors

SIL761F/R - Rear-Panel Multipin Input Connector

 

Copyright February 1998. LeCroy is a registered trademark of LeCroy Corporation. All rights reserved. Information in this publication supersedes all earlier versions. Specifications and prices subject to change without notice.