Eni 240L Manuale operativo

240L Broadband Power Amplifier

EN!

OPERATION &SERVICE MANUAL

240L

Broadband Power Generator

WARNING fHIGH RF VOLTAGES MAY BE PRESENT AT THE OUTPUT OF THIS

UNIT. All operating personnel should use extreme caution in handling these voltages and be

thoroughly familiar with this manual.

DO NOT USE ANY CFG (CHLOROFLUOROCARBON) SOLVENT IN THE

MAINTENANCE OF THIS PRODUCT. In recognition of our responsibility to protect

the environment, this product has been manufactured without the use of CFC's. The no-clean

flux now used in all soldering operations may leave asmall inert residue which will not affect the

performance of the product. The use of CFC’s for cleaning or maintenance may result in partial

Uquification of the no-clean flux residue, which will damage the unit and void the warranty.

Notice •

The material contained in this manual is subject to change without notice. No part of this manual may be reproduced or

utilized in any form or by any means, electronic or mechanical, including photocopying or electronic transmission or

other means of reproduction or distribution without prior written consent of ENI. The drawings, specifications and

other technical information contained in this manual are the property of ENI and shall not be copied, reproduced or used

in any way, in whole or in part, as the basis of manufacture or sale of similar items without the prior written consent

of EI^.

Manual Order Number: 240L-TM

Printed in the USA.

ENI warrants to the original purchaser for aperiod of one year from the date of delivery, each instrument to be free from

defects in materials and workmanship. For aperiod of one year, ENI will, at its option, adjust, repair, or replace defective

parts, without charge to the original purchaser, so that the instrument performs according to its specifications.

When warranty service is required, the instrument must be returned, transpOTtation prepaid, to the factory or to one of ENTs

designated service centers. If, in our opinion, the instrument has been damaged by accident, unreasonable use, buyer-supplied

software or interfacing, improper site preparation or maintenance, or abnonnal conditions of operation, repairs will be billed

at standard rates. In this case, an estimate will be submitted before the work is started.

THIS LIMITED WARRANTY IS EXCLUSIVE AND ENI MAKES NO OTHER WARRANTIES. EXPRESS OR IMPLIED, AND ALL OTHER

EXPRESS ORALOR WRITTEN WARRANTIES AND ALL WARRANTIES IMPLIED BY LAW, INCLUDING ANY WARRANTIES OF

MERCHANTABILITY OR FITNESS K)R APARTICULAR PURPOSE OR OTHER WARRANTY OF QUALITY AREEXCLUDED AND

DISCLAIMED. IN NO EVENT SHALL ENI BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES

RESULTING FROM BREACH OF ANY WARRANTY. WHETHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY

OF MERCHANTABIUTY OR FITNESS FOR APARTICULAR PURPOSE, OR FROM ANY CAUSE WHATSOEVER. INCLUDING

NEGLIGENCE. Buyer’s sole and exclusive remedy under this warranty shall be repair or replacement as set forth above, or if

ENI is unable to repair or replace the defective part within areasonable time, arefund of the price of the part or goods which

give rise to the warranty claim.

Service and Technical Assistance

For Technical Support for your particular application, contact the nearest ENI Sales and Service Center. The following

information will help us provide you with prompt and efficient service:

•All of the information contained on the unit’s name plate.

•Detailed description (i.e. physical damage and/or performance anomalies, quantitative and/or qualitative deviation from

specifications), including miscellaneous symptoms, dates and times.

•The environment and circumstances under which the issue developed.

•Names and telephone numbers of important contacts.

•Supporting test data and/or records that can be provided.

•Any previous, related conversations and/or correspondence with ENI.

For Service or Repair contact the closest Customer Service Department with the following information:

•Model and serial number

•Detailed description of malfunction

•hirchase order number

•Your company’s "BUI To" and "Ship To" address

You wUl receive aRMA (Return Materials Authorization) number, the wananty status of the unit to be returned and

estimated repair charge, if any. The RMA number is your authorization number. Please type this number on your purchase

order and shipping label. After ENI receives the unit, afirm quote and estimated date of completion will be given.

ENI East Coast

ENI West Coast

ENI Europe

ENI Germany

ENI Japan

Sales and Service Locations

ADivision of Astec America, Inc., 100 Highpower Road, Rochester, NY 14623

Tel: (716) 427-8300 Fax: (716) 427-7839 Service: (716) 292-7478

2065 Martin Ave., Suite 101, Santa Clara, CA 95050

Tel: (408) 727-0993 Fax: (408) 727-1352

Mundells Court,Welwyn Garden City, Hertfordshire AL lEN England

Tel: (0707) 371558 Fax: (0707) 339286

Holderackerstrasse 14, D-7016 Geriingen, Germany

Tel: 07156-21095 Fax: 07156-49372

541 Aoyogi, Kunitachi, Tokyo 186, Japan

Tel: 0425 22901 1Fax: 04025 222636

Fujita Bldg 4F, 2-27 Nishitenmna 3-chome, Kita-Ku, Osaka 530, Japan

Tel: 06-367-0823 Fax: 06-367-0827

Chapter 1Introduction 3

uIntroduction 3

1.2 Specifications 3

Chapter 2

2.1

2,2

2.2.1

2.2.2

2.2.3

2.3

Operation

Introduction

Rack Installation

Mains Volage Setting

Mains Fuse Rating

Mains Lead Connection

Operation

Chapter 3Technical Description 7

3.1 General Description

Chapter 4Maintenance 9

4,1 Introduction 9

4.2 Access and Layout 9

4,3 Performance Checks 10

4.3.1 Initial Check 10

4.4 Re-Alignment Procedure n

4.4.

Measurement of Gain 11

4.4.2 Measurement of Harmonics 12

4.5 Packaging for Reshipment 13

»n

Figures 15

Figure 1

Figure 2

Figure 3

Figure 4

Specifications

Gain Measurement

Harmonic Measurement

Outline Drawings

Power Amplifier Board

Driver /Combiner Board

P.S. Transistor Board

P.S. Regulator Board

RF Voltmeter Board

(240L-4301) A“1

(240L-4302)

(240L-4303) A-3

(240L-4304) A*^

(240L«4305) A-5

Parts List 240L- 1301

Glossary of Abbreviations

1.1 Introduction

The Model 240L is abroadband solid state power amplifier covering the frequency

range of 20 kHz to MHz.

More than 40W of RF power can be produced at the output, with low harmonic and

intermodulation distortion. Up to 200W of saturated power can be produced with

increased distortion products. Ahighly linear Class Adesign, the Model 240L will

amplify inputs of AM, FM, SSB, pulse and other complex modulations. The 50 dB

gain of the unit is unconditionally stable and will not oscillate for any possible

combination of source and load impedance. It is protected against failure due to

output load mismatch and/or overdrive.

Output RF voltage level, as well as power output into 50 O, is monitored by afront

panel meter. An integral power supply permits operation from 115/230 single phase

AC power.

Specifications

Physical and electrical specifications are listed in Figure 1.

Chapter 2

Operation

2.1 Introduction

The ENI 240L RF amplifier is used to increase the r.f. output level of signal sources

in the 20 kHz to 10 MHz range. No tuning or any other form of adjustment is

required other than the selection of the correct power supply input voltage.

The 240L produces rated power output connector, regardless of load impedance.

Any power reflected due to output load mismatch is absorbed in the amplifier.

Therefore, although the output impedance is 50 O(typical VSWR: 1.5:1), the

amplifier will work into any load impedance.

2.2 Rack Installation

For standard nineteen inch relay rack installations, rack mounting brackets are

supplied with the unit. Remove the two #8>32 screws on each side of the cover

nearest the front panel. Attach the rack mounting brackets firmly using the hardware

removed above. The rubber feet may be unscrewed and removed if the minimum

vertical usage of the relay rack is necessary.

2.2.1 Mains Voltage Setting

The supply voltage selection switch is located at the rear of the instrument and is

normally set for 115 VAC operation.

Before connecting the unit to the mains supply, check that the supply voltage

selection switch is correctly set. Extensive damage will result if the Amplifier is

connected to the wrong supply voltage. Under no circumstances should this

switch be operated while the supply is connected.

2,J2i,2i

2.2.3

2 3

The mains fuse FI is located on the rear panel. The replacement part number details

are:

115 V8amp Slow Blow ENl Part No. 313008

230 V4amp Slow Blow ENI Part No. 313004

Mains Lead Connection

For 230 VAC operation, asuitable mains supply plug must be fitted to the mains lead

attached to the instrument The three conductors are color coded as follows:

BLACK -Live

WHITE -Neutral

GREEN •Earth

Operation

Determine and adjust the voltage setting and fuse rating as described in the previous

sections 2.2.1 and 2.2.2 then proceed as follows:

(i) Ensure input voltage is not excessive

The 1Vrms indicated maximum input voltage is 5times the level of the input

signal required to achieve maximum output. Input voltages in excess of 2V

peak may permanently damage the instrument.

(ii) Connect the input signal via a50 Ocoaxial lead and BNC plug to the input

connector.

(iii) Connect the output via a50 Ocoaxial lead and BNC plug to the load.

Chapter 3

Technical Description

3.1 General Description

The ENI 240L is designed to amplify signals by 50 dB in the frequency band 20 kHz

to 10 MHz. The signS from the front panel BNC connector is fed via alength of

50 Q. coaxial cable into the input of the driver/combiner module (240L-4302). The

signal at the collector of Q1 is amplified further by transistor Q2. The output signal

at the collector of Q2 is then split into two equal phase and amplitude signals by

transformer T2. The two output signals from T2 are fed to the bases of Q3 and Q4,

The output signals of transistors Q3 and Q4 are combined in transformer T3,

impedance matched in transformers T4 and T6 and split into to equal phase and

amplitude signals by transformer T7. These output signals are fed to connectors- J3

and J4 which are fed via coaxial cables to the inputs of the two power amplifier

modules (240L~4301).

The signal applied at J5 is impedance matched and split into two equal phase and

amplitude signals by transformers T1 and T2. The signals at the outputs of T2 are

split and phase reversed by transformers T3 and T4. The outputs of transformers T3

and T4 are fed to the bases of Ql, Q2 and Q3, Q4 respectively. The power outputs

of Q1 and Q2 are combined in the phase reversing transformer T5 and the power

outputs of Q3 and Q4 are combined in phase reversing transformer T6. The output

signals from T5 and T6 are combined and impedance matched to 50 Qat the output

connector J7 by transformers T7 and T8.

The output signals from the two power amplifier modules (240L-4301) are fed via

coaxial cables to J9 and JIO of the driver/combiner module (240L-4302). These two

signals are combined by hybrid transformer T8. Capacitor Cl 8and transformer T9

match the combined RF output signal to 50 Q. at connector J1 1. The output signal is

fed via a50 Hcoaxial cable to the RF voltmeter module J12 (3100L-4206).

The signal at J12 is connected via alength of microstrip transmission line to the

output BNC connector J13. Off of this microstrip line resistors Rl, R2, R3 and R4

make up ahigh impedance voltage divider. Afast switching hot carrier diode CRl

rectifies the RF voltage from the divider. Awire gimmick (capacitor C2)

compensates for the high frequency roU-off of the diode CRl. Resistors R4, R5, R6

and capacitor Cl filter the rectified RF and convert it to DC which is fed to the front

panel meter (Ml).

The amplifier power requirements are 115 Vor 230 VAC. at 450W. The power

supply unit provides a36 VDC, 7.0A source and a21VDC 40 mA source. The

36VDC source is regulated by series pass transistors Ql, Q2, Q3 and Q4 and

integrated circuit regulator ICl. R3 adjusts the supply to 36V. The front panel light

and the RF voltmeter are connected to the 21 VDC source and the lamp will indicate

when the power supply is operating correctly.

Altri manuali per 240L

Indice

Altri manuali Eni Amplificatore

Eni

Eni 240L Manuale operativo

Eni

Eni 3100LA Manuale di formazione

Manuali Amplificatore popolari di altre marche

ASTRO

ASTRO HVO V40 P Manuale utente

Marantz

Marantz SUPERSCOPE BLA-545 Istruzioni per il montaggio

NAD

NAD CI980 Manuale utente

Technics

Technics SE-CH770 Manuale utente

Harman Kardon

Harman Kardon HK6300 Manuale utente

NAD

NAD T975 Manuale utente

McIntosh

McIntosh MA6850 Manuale utente

Electro-Harmonix

Electro-Harmonix ENGLISH MUFF’N Manuale utente

Viatron

Viatron Autrix Manuale utente

GME

GME GA9800 Manuale utente

Atlas

Atlas CP700 Manuale utente

Roland

Roland KC-1000 Manuale utente

Pyle

Pyle PFMRA350BW Manuale utente

Advantage

Advantage S-250 Manuale utente

IRT Electronics

IRT Electronics DVA-3007 Manuale utente

Dimavery

Dimavery BA-100 Series Manuale utente

Sony

Sony XM-S400D Manuale utente

Schertler

Schertler ROY X Manuale utente