LeCroy 4300B Manual de usuario

OPERATOR'S MANUAL

MODEL 4300B

CAMAC 16 CHANNEL,

FAST ENCODING &

READOUT ADC (FERA)

Revised

March, 1998

(ECO 1007)

Corporate Headquarters

700 Chestnut Ridge Road

Chestnut Ridge, NY 10977-6499

Tel: (914) 578-6013 Fax: (914) 578-5984

E-mail: lrs_sales@lecroy.com

lrs_support@lecroy.com

publication supersedes all earlier versions.

Innovators in Instrumentation

CE CONFORMITY

CONDITIONS FOR

CE CONFORMITY Since this product is a subassembly, it is the responsibility of the end

user, acting as the system integrator, to ensure that the overall system is

CE compliant. This product was demonstrated to meet CE conformity

using a CE compliant crate housed in an EMI/RFI shielded enclosure. It

is strongly recommended that the system integrator establish these

same conditions.

CAUTION

GENERAL Crate power should be turned off during insertion and removal of unit to

avoid possible damage caused by momentary misalignment of contacts.

See pocket in back of manual for schematics, parts list and additional

addenda with any changes to manual.

TABLE OF CONTENTS

General Information

Purpose 9

Unpacking and Inspection 9

Warranty 9

Product Assistance 9

Maintenance Agreements 9

Documentation Discrepancies 10

Software Licensing Agreement 10

Service Procedure 10

Front-Panel Diagram 11

1. Product Description

1.1 General 13

1.2 Specifications 13

1.3 Analog Inputs 14

1.4 Clear Function 14

1.5 External Gate Input (GATE) 15

1.6 ADC Pedestals 15

1.7 Test Function 15

1.8 Pedestal Memory 16

1.9 Status Register 16

1.10 ECL Port Output 18

1.11 ECL Port Readout Handshake 19

1.12 Halt of Readout on the ECL Port 20

1.13 CAMAC Readout 20

1.14 LAM Handling 21

1.15 FERA System Connections 21

1.16 Packaging and Power Requirements 22

2.0 Operating Instructions

2.1 General 31

2.2 CLEAR and GATE Functions 32

2.3 Charge to Time Converters 32

2.4 Test Circuit 33

2.5 Digital Interpolators 33

2.6 Real Time Counters 33

2.7 Clock Generators 34

2.8 Pedestal Memory 34

2.9 Data Compression and Readout Logic 34

2.10 ECL Port Readout Circuit 36

2.11 CAMAC Readout Circuit 36

2.12 CAMAC Functions Decoder 36

2.13 ADC Resolution Adjustment 36

3.0 List of Figures and Tables

1.1 Readout Timing Diagram 23

1.2 ECL Port Timing Diagram 24

1.3 FERA System Connections 25

1.4 Model 4301 FERA Driver Block Diagram 26

1.5 Localization of Removable Resistors & VGND-GND Jumper 27

1,1a Table: Status Register Format 28

1.1b Table: Readout Format 29

2.1 Model 4300B Block Diagram 38

2.2 Charge-to-Time Converter Block Diagram 39

2.3 Time-to-Digital Converter Blcok Diagram and Timing 40

4.0 Appendix

4.1 ECL Differntial I/O Levels 41

4.2 ECL Single-Ended I/O Levels 42

PURPOSE This manual is intended to provide instruction regarding the setup and

operation of the covered instruments. In addition, it describes the theory

of operation and presents other information regarding its functioning and

application.

UNPACKING AND

INSPECTION It is recommended that the shipment be thoroughly inspected immedi-

ately upon delivery. All material in the container should be checked

against the enclosed Packing List and shortages reported promptly.

If the shipment is damaged in any way, please notify the Customer

Service Department or the local field service office. If the damage is

due to mishandling during shipment, you may be requested to assist in

contacting the carrier in filing a damage claim.

WARRANTY LeCroy warrants its instrument products to operate within specifications

under normal use and service for a period of one year from the date of

shipment. Component products, replacement parts, and repairs are

warranted for 90 days. This warranty extends only to the originalpur-

chaser. Software is thoroughly tested, but is supplied "as is" with no

warranty of any kind covering detailed performance. Accessory products

not manufactured by LeCroy are covered by the original equipment

manufacturers' warranty only.

In exercising this warranty, LeCroy will repair or, at its option, replace any

product returned to the Customer Service Department or an

authorized service facility within the warranty period, provided that the

warrantor's examination discloses that the product is defective due to

workmanship or materials and has not been caused by misuse, neglect,

accident or abnormal conditions or operations.

The purchaser is responsible for the transportation and insurance

charges arising from the return of products to the servicing facility.

LeCroy will return all in-warranty products with transportation prepaid.

This warranty is in lieu of all other warranties, express or implied, includ-

ing but not limited to any implied warranty of merchantability, fitness, or

adequacy for any particular purpose or use. LeCroy shall not be liable

for any special, incidental, or consequential damages, whether incon-

tract, or otherwise.

PRODUCT ASSISTANCE Answers to questions concerning installation, calibration, and use of

LeCroy equipment are available from the Customer Service Department,

700 Chestnut Ridge Road, Chestnut Ridge, New York, 10977-6499,

(914) 578-6030.

MAINTENANCE

AGREEMENTS LeCroy offers a selection of customer support services. For example,

Maintenance Agreements provide extended warranty that allows the

customer to budget maintenance costs after the initial warranty has

expired. Other services such as installation, training, on-site repair, and

addition of engineering improvements are available through specific

Supplemental Support Agreements. Please contact the Customer

Service Department for more information.

GENERAL INFORMATION

DOCUMENTATION

DISCREPANCIES LeCroy is committed to providing state-of-the-art instrumentation and is

continually refining and improving the performance of its products. While

physical modifications can be implemented quite rapidly, the corrected

documentation frequently requires more time to produce. Consequently,

this manual may not agree in every detail with the accompanying product

and the schematics in the Service Documentation. There may be small

discrepancies in the values of components for the purposes of pulse

shape, timing, offset, etc., and, occasionally, minor logic changes.

Where any such inconsistencies exist, please be assured that the unit is

correct and incorporates the most up-to-date circuitry.

SOFTWARE LICENSING

AGREEMENT Software products are licensed for a single machine. Under this license

you may:

■Copy the software for backup or modification purposes in support of

your use of the software on a single machine.

■Modify the software and/or merge it into another program for your

use on a single machine.

■Transfer the software and the license to another party if the other

party accepts the terms of this agreement and you relinquish all

copies, whether in printed or machine readable form, including all

modified or merged versions.

SERVICE PROCEDURE Products requiring maintenance should be returned to the Customer

Service Department or authorized service facility. If under warranty,

LeCroy will repair or replace the product at no charge. The purchaser is

only responsible for the transportation charges arising from return of the

goods to the service facility. For all LeCroy products in need of repair

after the warranty period, the customer must provide a Purchase Order

Number before any inoperative equipment can be repaired or replaced.

The customer will be billed for the parts and labor for the repair as well

as for shipping. All products returned for repair should be identified by

the model and serial numbers and include a description of the defect or

failure, name and phone number of the user. In the case of products

returned, a Return Authorization Number is required and may be

obtained by contacting the Customer Service Department at (914) 578-

6030.

MODEL 4300B

FRONT-PANEL

Pull Down ON (LED

indicator) indicates

that pull down and

input resistors are

mounted on Command

bus (Sec. 1.15)

Command Bus

Analog Inputs

(Sec 1.3)

Not connected

Write Strobe (Sec. 1.11)

Readout Request (Sec. 1.11)

Clear (Sec. 1.4)

Gate (Sec. 1.5)

Write Acknowledge (Sec. 1.11)

Ground

Test Reference Voltage (Sec. 1.7)

Readout Enable (Sec. 1.11)

Readout Enable PASS (Sec. 1.11)

Common Virtual Ground

(Sec. 1.3)

Ground (Sec 1.3)

Pull Down on (LED

Indicator) indicates

that pull down

resistors are mounted

on the ECL output

Port (Sec. 1.15)

ECL output port

(Sec 1.10)

Last 2 pins not

connected

1.1 General The LeCroy Model 4300B FERA contains 16 independent charge-to-

digital converters with common GATE and common CLEAR.

Four basic factory options are available:

a. 8 or 9 bits with 100 ohm impedance

b. 8 or 9 bits with 50 ohm input impedance

c. 10 or 11 bits with 100 ohm input impedance

d. 10 or 11 bits with 50 ohm input impedance.

The options a, b and c are only produced for large quantities. The

resolution on each of the above versions may be adjusted via jumpers

and an internal potentiometer (see Section 2.13 for details).

1.2 Specifications

PRODUCT DESCRIPTION

LeCroy Input Resolution Conversion Range Sensitivity Digital Values

4300B Impedance Time Typical Typical Full Over

MOD Scale Flow

ohms bits µsec pC pC/count counts counts

100 100 8 1.8 128 0.5 255 2047

500 50

110 100 9 2.8 256 0.5 511 2047

510 50

200 100 10 4.8 256 0.25 1023 2047

600 50

210 100 11 8.5 480 0.25 1919 2047

610 50

An 8-bit register (Status Register) and a memory (Pedestal Memory),

containing the individual pedestal (or offset) values to be subtracted from

each ADC, allow different readout modes of the 16 digitized ADC values.

Both the Status Register and Pedestal Memory must be previously

loaded via CAMAC. Data may be read out either via the CAMAC

dataway or the ECL port. The state of the Status Register determines the

readout modes. The ECL port output, located on the front-panel, is first

activated and delivers ADC data sequentially in words of 16 bits (8 to 11

bits of data plus 4 subaddress) at differential ECL levels. When data are

ready to be read at the ECL port, the REQ output is activated.

In CAMAC mode, data are also read out in 16-bit words in either random

access or sequential CAMAC readout (Q stop mode). The CAMAC

readout can only be carried out after completion of ECL port readout.

When data are ready for readout via CAMAC dataway, a LAM may be

generated and there is a Q response to the readout function F(2). The

data read out mode via these two ports may be independently selected

and programmed to be in one of three states: 1) raw; 2) with the pedes-

tal subtracted; or 3) compacted, i.e., all data < 1 are eliminated (Zero

suppression).

A system for testing the 16 ADCs is incorporated in the Model 4300B.

The test is initiated by the CAMAC command F(25) A(0). This command

opens the ADC GATEs and applies, at the input of each one, a charge

proportional to the continuous voltage that must be given on the front

panel TRV input.

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