Document type: Title: Revision date: Revision:
User's Manual (MUT) Mod. N968 Spectroscopy Amplifier 14/06/2004 4
NPO: Filename: Number of pages: Page:
00100/03:N968x.MUTx/04 N968_REV4.DOC 14 4
1. General description
1.1 Overview
The Mod. N968 is a spectroscopy amplifier implemented in a single-width NIM module. It
accepts the typical outputs generated from either optical feedback or resistor feedback
preamplifiers connected with nuclear particle detectors.
A front panel switch allows to select between positive and negative input signals.
Gain setting can be performed continuously in the 10 ÷ 1500 range, product of Coarse, Fine
and Superfine Gain. Two internal jumpers allow to set a x0.1 attenuation and a further x2
amplification, thus extending the gain range to 1 ÷ 3000.
Shaping time (Ts) values are 0.5, 1, 2, 3, 6, 10 µs.
The Pole Zero (PZ) cancellation is performed via a front panel screw-trimmer.
The module features also:
- a Bipolar output (to be used for timing purposes)
- An advanced Baseline Restorer (BLR) circuit, with either manual or automatic threshold
setting
- A Pile Up Rejector (PUR) which allows to reject piled up events
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