LeCroy 4564 16 to 64 Fold Logic Unit

OVERVIEW

The LeCroy Model 4564 is a simple and useful logic unit. It consists of four times 16 input OR's followed by a set of additional 2-fold and 4-fold OR and AND functions. The logic diagram, shown at the bottom of this page, shows the internal architecture of the module. All the outputs are provided on a rear panel connector.

This CAMAC module provides a general purpose OR facility for inputs grouped in units of 16. It is especially useful with LeCroy ECLine 16 Channel Discriminators. All logic connections follow the ECLine Standard and use low cost multiconnector flat or twisted pair cable and connectors.

SPECIFICATIONS

Input Characteristics

Signal Inputs:

64 in four 2 x 17 pin front panel connectors;
all inputs accept differential ECL levels;
impedance: 110 ohms;
minimum input pulse width 6 nsec maximum width DC;
maximum input frequency > 100 MHz.

Output Characteristics

Overlap Outputs:

Rear panel 2 x 17 pin connector, out 1 to 12;
generate differential ECL levels;
the output pulse width corresponds to the input pulse overlap +/- 2 nsec for the desired logic combination.
See logic diagram below for pin allocation to the different logic functions;
minimum output width 5 nsec, maximum width DC;
maximum overlap output frequency > 100 MHz;
transit time 12 nsec +/- 1 nsec independent from the logic function.

Shaped Outputs:

Rear panel connector, out 13 to 16;
any of the overlap logic combinations can be connected, via jumper option to any of the four discriminator/shaper included in the unit;
these four shaped outputs provide differential ECL levels and the output width is internally adjustable from 15 to 500 nsec;
maximum frequency: 50 MHz;
double pulse resolution 13 nsec.