Caen N625 Technical document

Technical
Information
Manual
1 June 2004
Revision n. 3
MOD. N625
QUAD LINEAR
FAN IN / FAN OUT
MANUAL REV.3
NPO:
00111/02:N625x.MUTx/03

CAEN will repair or replace any product within the guarantee period if the Guarantor declares
that the product is defective due to workmanship or materials and has not been caused by
mishandling, negligence on behalf of the User, accident or any abnormal conditions or
operations.
CAEN declines all responsibility for damages or
injuries caused by an improper use of the Modules due
to negligence on behalf of the User. It is strongly
recommended to read thoroughly the CAEN User's
Manual before any kind of operation.
CAEN reserves the right to change partially or entirely the contents of this Manual at any time
and without giving any notice.

Document type: Title: Revision date: Revision:
User's Manual (MUT) Mod. N625 Quad Linear Fan In/Fan Out 01/06/2004 3
NPO: Filename: Number of pages: Page:
00111/02:N625x.MUTx/03 N625_REV3.DOC 10 3
TABLE OF CONTENTS
1. MODULE DESCRIPTION ........................................................................................................................4
1.1 OVERVIEW .........................................................................................................................................4
1.2 BLOCK DIAGRAM................................................................................................................................5
2. TECHNICAL SPECIFICATIONS............................................................................................................6
2.1 PACKAGING........................................................................................................................................6
2.2 POWER REQUIREMENTS ......................................................................................................................6
2.3 FRONT AND BACK PANEL....................................................................................................................7
2.4 MECHANICAL AND ELECTRICAL FEATURES.........................................................................................8
2.4.1 Fan in/Fan out sections.................................................................................................................8
2.4.2 Discriminator ................................................................................................................................8
2.5 TECHNICAL SPECIFICATION TABLE ...................................................................................................10
LIST OF FIGURES
FIG. 1.1: FAN IN/FAN OUT SECTION BLOCK DIAGRAM ............................................................................................5
FIG. 2.1: MOD. N625 FRONT AND BACK PANEL......................................................................................................7
FIG. 2.2: JUMPERS SETTING....................................................................................................................................9
LIST OF TABLES
TABLE 2.1: POWER REQUIREMENTS .......................................................................................................................6
TABLE 2.2: FAN IN/FAN OUT TECHNICAL FEATURES.............................................................................................10
TABLE 2.3: DISCRIMINATOR CHANNEL TECHNICAL FEATURES.............................................................................10

Document type: Title: Revision date: Revision:
User's Manual (MUT) Mod. N625 Quad Linear Fan In/Fan Out 01/06/2004 3
NPO: Filename: Number of pages: Page:
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1.Module description
1.1 Overview
The Mod. N625 is a 1-unit NIM module which houses:
− Four linear 4 Input + 4 Output Fan in/Fan out sections
− One 1 Channel Discriminator
Each Fan in/Fan out section produces on all its output connectors, the sum of the signals
fed to the inputs, multiplied for the selected gain factor (1 or –1, jumper selectable).
Gain = 1 (non inverting mode) and gain = -1 (inverting mode) are signalled by LEDs.
Fan in/Fan out inputs are bipolar, both input and output signals are DC coupled.
Moreover each Fan in/Fan out section features a screwdriver trimmer which allows the
DC offset (“zero”) adjustment.
The discriminator channel has one DC coupled input, an internal jumper allows to
perform the slope coupling on either the leading or the trailing edge; the threshold is
screwdriver adjustable and monitorable via test point; the output is NIM standard, its
width is screwdriver adjustable as well.
The discriminator In/Out connectors are placed on the back panel, while its controls are
on the front panel.

Document type: Title: Revision date: Revision:
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1.2 Block diagram
Fig. 1.1: Fan in/Fan out section block diagram
IN
BUFFER
OUT
ANALOG
ADDER
+
-
GAIN: ±1 DC OFFSET
GAIN: ±1

Document type: Title: Revision date: Revision:
User's Manual (MUT) Mod. N625 Quad Linear Fan In/Fan Out 01/06/2004 3
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2.Technical specifications
2.1 Packaging
The module is housed in a one unit wide std. NIM mechanics.
2.2 Power requirements
The power requirements of the module are as follows:
Table 2.1: Power requirements
+12 V 110 mA
-12 V 155 mA
+6 V 230 mA
-6 V 225 mA

Document type: Title: Revision date: Revision:
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2.3 Front and back panel
Fig. 2.1: Mod. N625 front and back panel
QUAD LINEAR
FAN IN - FAN OUT
ZEROADJ
THR WDT
I
N
TRG SLOPE
DISCRIMINATOR
THRESHOLDTESTPOINT
DISCRIMINATOR
THRESHOLD TRIMMER
OUTPUTWIDTH TRIMMER
TRIGGER SLOPE LEDS
INPUT
CONNECTORS OUTPUT
CONNECTORS
GAIN LEDS
ZEROADJUSTMENT
TRIMMER
+1
-1
GAIN
O
U
T
ZEROADJ
I
N
+1
-1
GAIN
O
U
T
ZEROADJ
I
N
+1
-1
GAIN
O
U
T
ZEROADJ
I
N
+1
-1
GAIN
O
U
T
Ser. n.
Mod.
N625
IN OUT
DISCRIMINATOR
DISCRIMINATOR
INPUTCONNECTOR DISCRIMINATOR
OUTPUTCONNECTOR
A
B
C
D
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
REAR DISCR.SET

Document type: Title: Revision date: Revision:
User's Manual (MUT) Mod. N625 Quad Linear Fan In/Fan Out 01/06/2004 3
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2.4 Mechanical and electrical features
2.4.1 Fan in/Fan out sections
INPUT CONNECTORS:Mechanical specifications:
Front panel LEMO 00 type connectors
Electrical specifications:
Bipolar, DC coupled, 50 Ωimpedance
OUTPUT CONNECTORS:Mechanical specifications:
Front panel LEMO 00 type connectors
Electrical specifications:
DC coupled, provided across 50 Ωloads
ZERO TRIMMER:Mechanical specifications:
Front panel screwdriver trimmer
Function:
Allows to adjust the output DC offset within a
±100 mV range
DISPLAYS:Gain LEDs: 2 Front panel LEDs per section:
green: Gain=-1; yellow: Gain=+1.
INTERNAL JUMPERS:Gain jumper: allows to set gain either at +1 or
at -1 (refer to Fig. 2.2)
2.4.2 Discriminator
INPUT CONNECTOR:Mechanical specifications:
Back panel LEMO 00 type connector
Electrical specifications:
Bipolar, DC coupled, 50 Ωimpedance
OUTPUT CONNECTOR:Mechanical specifications:
Back panel LEMO 00 type connector
Electrical specifications:
Std. NIM level, provided across a 50 Ωload
WIDTH TRIMMER:Mechanical specifications:
Front panel screwdriver trimmer
Function:
Allows to adjust the output pulse width in the
5÷70 ns/15÷600 ns ranges, jumper selectable
(see Fig. 2.2)

Document type: Title: Revision date: Revision:
User's Manual (MUT) Mod. N625 Quad Linear Fan In/Fan Out 01/06/2004 3
NPO: Filename: Number of pages: Page:
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THRESHOLD TRIMMER:Mechanical specifications:
Front panel screwdriver trimmer
Function:
Allows to adjust the discriminator threshold in
the -1200÷+1200 mV range; one test–point
allows to monitor the threshold value
DISPLAYS:Trigger slope LEDs: 2 Front panel LEDs; the
relevant LED lights up according to the trigger
slope setting: green: Trailing edge; yellow:
Leading edge
INTERNAL JUMPERS:Trigger slope jumper: allows to set the trigger
slope either to leading or to trailing edge
Width range jumper: allows to select the
output width range between 5÷70 ns and
15÷600 ns (refer to Fig. 2.2)
Fig. 2.2: Jumpers setting
GAIN
-1x +1x
FAN IN/FAN OUT
DISCRIMINATOR
TRIGGER SLOPE
LEADING TRAILING
PRINTED BOARD
WIDTH RANGE
5÷70 ns 15÷600 ns
JP4 JP3 JP2 JP1
JP8 JP7 JP6 JP5
JP12 JP11 JP10
JP9
JP19 JP18 JP17 JP16
JP15 JP14 JP13
J8
GAIN SELECTION
GAINSELECTION
GAINSELECTION
GAINSELECTION
TRGSLOPE SEL
WDT RANGE

Document type: Title: Revision date: Revision:
User's Manual (MUT) Mod. N625 Quad Linear Fan In/Fan Out 01/06/2004 3
NPO: Filename: Number of pages: Page:
00111/02:N625x.MUTx/03 N625_REV3.DOC 10 10
2.5 Technical specification table
Table 2.2: Fan in/Fan out technical features
Inputs bipolar, DC coupled, 50 Ωimpedance
Outputs DC coupled, inverted or non inverted (internal jumper
selectable), drive 50 Ωloads
Max. input amplitude ±1.6 V
Gain ±1 (internal jumper selectable)
DC offset (Zero) adjustment ±100 mV
Input reflection <4%
Interchannel insulation <40 dB
Input band width 100 MHz
(input: sine wave with 1 V peak-to-peak amplitude)
Integral non-linearity < 1%
DC offset stability <100 µV/ °C
Noise <300 µV RMS
Input/output delay 4 ± 1 ns
Table 2.3: Discriminator channel technical features
Input channel DC coupled on either leading or trailing edge (jumper
selectable), 50 Ω
Max. input voltage ± 5V
Min. detectable signal ± 10 mV
Max. input frequency 90 MHz
Double pulse resolution 11 ns
Threshold range ±1200 mV
Output channel Std. NIM level, provided across a 50 Ωload, non updating
Threshold stability 70 µV/ °C
Input/output delay 11 ns
Output width Dual range: 5÷70 ns/15÷600 ns
Output rise/fall time 1 ns