Bird Technologies 8329-300 User Manual

INSTRUCTION BOOK

A

OPERATING INSTRUCTIONS

TENULINE®ATTENUATOR

MODEL 8329-300

Electronic Corporation

Cleveland (Solon) Ohio US

©Copyright 1998 by Bird Electronic Corporation

Instruction Book Part Number 920-8329-300 Revision A

Tenuline®is a Registered Trademark of

Bird Electronic Corporation

Safety Precautions

The following are general safety precautions that are not necessarily related
to any specific part or procedure, and do not necessarily appear elsewhere in
this publication. These precautions must be thoroughly understood and ap­plied to all phases of operation and maintenance.

Keep Away From Live Circuits

Operating Personnel must at all times observe general safety precautions. Do
not replace components or make adjustments to the inside of the test equip­ment with the high voltage supply turned on. To avoid casualties, always re­move power.

Shock Hazard

Do not attempt to remove the RF transmission line while RF power is pres­ent.

Do Not Service Or Adjust Alone

Under no circumstances should any person reach into an enclosure for the
purpose of service or adjustment of equipment except in the presence of some­one who is capable of rendering aid.

Safety Earth Ground

An uninterruptible earth safety ground must be supplied from the main
power source to test instruments. Grounding one conductor of a two conduc­tor power cable is not sufficient protection. Serious injury or death can occur
if this grounding is not properly supplied.

Resuscitation

Personnel working with or near high voltages should be familiar with modern
methods of resuscitation.

Safety Symbols

WARNING

Warning notes call attention to a procedure, which if not correctly

performed, could result in personal injury.

i

CAUTION

Caution notes call attention to a procedure which if not correctly

performed, could result in damage to the instrument.

This symbol appears on the equipment indicating there is
important information in the instruction manual regarding
that particular area.

Note: Calls attention to supplemental informa-

+

tion.

Warning Statements

WARNING

The vent plug must be used at all times when the unit is in operation

or cooling. Failure to do this could result in damage to the equipment

and endanger the operator’s safety. Be sure to check the plug.

WARNING

Using this attenuator in the upper end of its power dissipation range

will cause the housing to become hot. Care should be exercised in

touching it.

WARNING

Never attempt to disconnect the equipment from the transmission line

while RF power is being applied. Leaking RF energy is a potential

health hazard.

Caution Statements

CAUTION

This equipment is designed for operation in a horizontal position only,

with mounting brackets down. Do not operate in any other manner.

CAUTION
RF power rating must always be cut in half when the blower assembly
is installed but is not running. Under this conditiona2kWattenuator

will be limited to approximately 1 kW.

ii

Safety Statements

USAGE

ANY USE OF THIS INSTRUMENT IN A MANNER NOT
SPECIFIED BY THE MANUFACTURER MAY IMPAIR
THE INSTRUMENT’S SAFETY PROTECTION.

USO

EL USO DE ESTE INSTRUMENTO DE MANERA NO ES­PECIFICADA POR EL FABRICANTE, PUEDE ANULAR
LA PROTECCIÓN DE SEGURIDAD DEL INSTRU­MENTO.

BENUTZUNG

WIRD DAS GERÄT AUF ANDERE WEISE VERWENDET
ALS VOM HERSTELLER BESCHRIEBEN, KANN DIE
GERÄTESICHERHEIT BEEINTRÄCHTIGT WERDEN.

UTILISATION

TOUTE UTILISATION DE CET INSTRUMENT QUI
N’EST PAS EXPLICITEMENT PRÉVUE PAR LE FABRI­CANT PEUT ENDOMMAGER LE DISPOSITIF DE PRO­TECTION DE L’INSTRUMENT.

IMPIEGO

QUALORA QUESTO STRUMENTO VENISSE UTILIZ­ZATO IN MODO DIVERSO DA COME SPECIFICATO DAL
PRODUTTORE LA PROZIONE DI SICUREZZA
POTREBBE VENIRNE COMPROMESSA.

SERVICE

SERVICING INSTRUCTIONS ARE FOR USE BY SERV­ICE - TRAINED PERSONNEL ONLY. TO AVOID DAN­GEROUS ELECTRIC SHOCK, DO NOT PERFORM ANY
SERVICING UNLESS QUALIFIED TO DO SO.

SERVICIO

LAS INSTRUCCIONES DE SERVICIO SON PARA USO
EXCLUSIVO DEL PERSONAL DE SERVICIO CA­PACITADO. PARA EVITAR EL PELIGRO DE DESCAR­GAS ELÉCTRICAS, NO REALICE NINGÚN SERVICIO A
MENOS QUE ESTÉ CAPACITADO PARA HACERIO.

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Bird Model 8329-300 Tenuline Attenuator

WARTUNG

ANWEISUNGEN FÜR DIE WARTUNG DES GERÄTES
GELTEN NUR FÜR GESCHULTES FACHPERSONAL.

ZUR VERMEIDUNG GEFÄHRLICHE, ELEKTRISCHE
SCHOCKS, SIND WARTUNGSARBEITEN
AUSSCHLIEßLICH VON QUALIFIZIERTEM SERV­ICEPERSONAL DURCHZUFÜHREN.

ENTRENTIEN

L’EMPLOI DES INSTRUCTIONS D’ENTRETIEN DOIT
ÊTRE RÉSERVÉ AU PERSONNEL FORMÉ AUX OPÉRA­TIONS D’ENTRETIEN. POUR PRÉVENIR UN CHOC
ÉLECTRIQUE DANGEREUX, NE PAS EFFECTUER
D’ENTRETIEN SI L’ON N’A PAS ÉTÉ QUALIFIÉ POUR
CE FAIRE.

ASSISTENZA TECNICA

LE ISTRUZIONI RELATIVE ALL’ASSISTENZA SONO
PREVISTE ESCLUSIVAMENTE PER IL PERSONALE OP­PORTUNAMENTE ADDESTRATO. PER EVITARE PERI­COLOSE SCOSSE ELETTRICHE NON EFFETTUARRE
ALCUNA RIPARAZIONE A MENO CHE QUALIFICATI A
FARLA.

CONNECT INTERLOCK TO TRANSMITTER BEFORE
OPERATING.

BRANCHER LE VERROUILLAGE À L’ÉMETTEUR
AVANT EMPLOI.

CONECTE EL INTERBLOQUEO AL TRANSMISOR AN­TES DE LA OPERACION.

VOR INBETRIEBNAHME VERRIEGELUNG AM SENDER
ANSCHLIESSEN.

PRIMA DI METTERE IN FUNZIONE L’APPARECCHIO,
COLLEGARE IL DISPOSITIVO DI BLOCCO AL TRAS­METTITORE.

iv

About This Manual

This instruction manual covers the Model 8329-300 Tenuline Attenuator.
This instruction book is arranged so that essential information on safety is
contained in the front of the book. Reading the Safety Precautions section be­fore operating the equipment is strongly advised.

The remainder of this instruction book is divided into chapters and sections.

Operation

First time operators should read Chapter 1 - Introduction, Chapter 2 - Theory
of Operation, and Chapter 3 - Installation to get an overview of equipment ca­pabilities and how to install it. An experienced operator can refer to Chapter
4 - Operating Instructions. All instructions necessary to operate the equip­ment are contained in this chapter.

Maintenance

All personnel should be familiar with preventive maintenance found in Chap­ter 5 - Maintenance. If a failure should occur, the troubleshooting section will
aid in isolating and repairing the failure.

Parts

For the location of major assemblies or parts, refer to the parts lists and asso­ciated drawings in Chapter 5 - Maintenance.

Changes To This Manual

We have made every effort to ensure this manual is accurate at the time of
publication. If you should discover any errors, or if you have suggestions for
improving this manual, please send your comments to our factory. This man­ual may be periodically updated, when inquiring about updates to this man­ual refer to the part number and revision level on the title page.

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Bird Model 8329-300 Tenuline Attenuator

vi

Table of Contents

Safety Precautions. ......................i

Warning Statements. ......................ii

Caution Statements........................ii

Introduction. ........................1

Purpose and Function. ...................1

Description.........................1

Dimensions and Weight. ..................1

Items Supplied. ......................1

Items Required. ......................2

Optional Items. ......................2

Specifications. .........................3

Theory of Operation. .....................5

Operating Instructions. ....................7

Site and Shelter Requirements. ...............7

Unpacking and Inspection. .................7

Tools Required. ......................7

Mounting. ........................8

Vent Plug. ........................8

Thermoswitch. ......................9

Blower Assembly......................11

Operating Instructions. ...................13

Initial Adjustments.....................13

Connection. .......................13

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Bird Model 8329-300 Tenuline Attenuator

Normal Operation. ....................14

Operation Under Abnormal Conditions. ...........15

Shutdown. ........................15

Emergency Shutdown. ...................15

Maintenance. ........................17

Troubleshooting. ........................17

Cleaning. ...........................17

Preventive Maintenance. ....................18

Measure dc Resistance. ..................18

RF Connector. .........................19

Coolant. ...........................20

Adding Coolant. .....................20

Replacing Coolant. ....................20

RF Load Resistor. .......................22

Thermoswitch. .........................22

Repairs. ...........................22

Customer Service. .......................23

Sales / Repair Facilities. ..................23

Sales Facilities. .....................23

Shipment............................23

RF Section Assembly. ...................23

Complete Unit. ......................23

Storage. ...........................24

Replacement Parts List......................24

viii

Chapter 1

Introduction

This publication refers to the Tenuline Attenuator Model
8329-300. This chapter contains introductory information
including product specifications, items supplied, and acces­sory items available.

Purpose and

Function

Description Relying only on ambient air currents, this Tenuline

The Model 8329-300 Attenuator is a low-reflection resis­tance network for application in reducing RF power by
known and controlled amounts. It is a self-contained instru­ment that requires no external source of power (except if
blower equipped) or utility service. The radiator has rhom­bic shaped cooling fins spaced evenly along its length for the
most efficient cooling. This attenuator is useful for lowering
a high input RF power to a level suitable for feeding into an
oscilloscope, frequency counter or similar device. The
attenuator is designed to match the most commonly used 50
ohm transmission line systems.

Attenuator will safely absorb, and dissipate harmlessly as
heat, up to 2000 watts of input power. When equipped with
an optional blower, Model BA-300, the increased air flow
will allow a doubling of the rated load capacity to 4000
watts. Over the frequency range of dc to 500 MHz, the
power output will be reduced by 30dB (99.9%) ±0.5dB. Up to
500 MHz, the input VSWR will not exceed 1.1 and the out­put VSWR 1.15.

This attenuator is a passive device that is self-contained
and does not need any external source of power or utilities
to function. The exception would be the use of the optional
BA-300 blower for a higher cooling rate. The BA-300-115 re­quires 115V at 50/60 Hz and the BA-300-230 requires 230V
at 50/60 Hz.

Dimensions

and Weight

Items

Supplied

This attenuator is 23-1/4"L x 7-1/8"W x 17-3/16"H (591 x 181
x 437mm). It has a net weight of 57 lbs. (26kg) and a ship­ping weight of approximately 68 lbs. (31 kg). Equipped with
a blower assembly the net weight is 70.5 lbs. (32kg) and the
shipping weight is 85 lbs. (39kg).

The following items are supplied with the Model 8329-300.

s

LC Female connector - input end

s

N Female connector - output end

1