Bird Electronic TENULINE 8320 Series Operator's Manual

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OPERATOR MANUAL

SERIES 8320

TENULINE® ATTENUATOR

Electronic Corporation

Cleveland (Solon) Ohio USA

Instruction Book Part Number 920-8320s Rev. A

Tenuline® is a Registered Trademark

of Bird Electronic Corporation

www.valuetronics.com

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Summary of Contents for Bird Electronic TENULINE 8320 Series

Page 1 OPERATOR MANUAL SERIES 8320 TENULINE® ATTENUATOR Electronic Corporation Cleveland (Solon) Ohio USA ©Copyright 1996 by Bird Electronic Corporation Instruction Book Part Number 920-8320s Rev. A Tenuline® is a Registered Trademark of Bird Electronic Corporation www.valuetronics.com...
Page 2: Limited Warranty
Limited Warranty All products manufactured by Seller are warranted to be free from defects in material and workmanship for a period of one (1) year, unless otherwise spec- ified, from date of shipment and to conform to applicable specifications, draw- ings, blueprints and/or samples.
Page 3: Safety Precautions
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 apply to all phases of operation and maintenance. Keep Away From Live Circuits Operating personnel must at all times observe general safety precautions.
Page 4 Bird Model 8320S Tenuline Attenuator Safety Symbols WARNING Warning notes call attention to a procedure, which if not correctly performed, could result in personal injury. CAUTION Caution notes call attention to a procedure, which if not correctly performed, could result in damage to the instrument. The following safety warnings appear in the text where there is danger to op- erating and maintenance personnel and are repeated here for emphasis.
Page 5 The following equipment cautions appear in the text whenever the equipment is in danger of damage and are shown here for emphasis. CAUTION The Calorimeter can overheat if operated without sufficient coolant. Failure to keep coolant reservoir adequately filled can result in serious damage to the equipment.
Page 6: About This Manual
About This Manual This instruction book covers the Tenuline Attenuator Models 8321, 8322, 8323 & 8325, which collectively are refered to as the 8320 Series. This instruction book is arranged so that essential information on safety ap- pears in the front of the book. Reading the Safety Precautions Section before operating the equipment is strongly advised.
Page 7: Table Of Contents
Table Of Contents Safety Precautions....i Safety Precautions ..... i Warning Statements .
Page 8 Bird Model 8320S Tenuline Attenuator Start-up ......9 Normal Operation ..... 9 Operation Under Abnormal Conditions.
Page 9 Reassembly ..... . . 16 Repairs ......16 Shipment .
Page 10 viii www.valuetronics.com...
Page 11: Introduction
Chapter 1 Introduction The Series 8320 Tenuline Attenuator are low reflection re- Purpose and Function sistance networks for use in reducing RF power in 50 ohm transmission lines by known and controlled amounts. They are self-contained instruments that require no external source of power or utility service.
Page 12: Tools And Test Equipment
Bird Model 8320S Tenuline Attenuator Only simple tools such as screwdrivers will be necessary for Tools and Test disassembly of this equipment. A resistance bridge or ohm- Equipment meter with an accuracy of one percent or better at 50 ohms is useful for checking the resistance of the RF Section as- sembly.
Page 13 Introduction Specifications Impedance 50 ohms nominal VSWR Input 1.1:1.0 maximum dc-500 MHz Output 1.15:1.0 maximum dc-500 MHz Connectors Input Bird “QC”, Female N normally supplied Output Bird “QC”, Female N normally supplied Power Rating Model 8321 50 W Model 8322 200 W Model 8323 100 W...
Page 14 Bird Model 8320S Tenuline Attenuator www.valuetronics.com...
Page 15: Installation
Chapter 2 Installation Location CAUTION This equipment is designed for operation in a horizontal position only, with the mounting brackets down. Do not operate in any other manner. Allow at least six inches (150 mm) of clearance around the unit, to permit an unimpeded access of convection air cur- rents for adequate heat dissipation.
Page 16 Bird Model 8320S Tenuline Attenuator 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 this plug. Before placing the Model 8325 Attenuator into service, the solid shipping plug, P/N 2450-049 must be removed and re- placed by the spring loaded vent plug, P/N 2450-094.
Page 17: Theory Of Operation
Chapter 3 Theory of Operation The Series 8320 Attenuators are symmetrical “T” pads, with General the power distribution on the legs being different. The value of the resistance on each leg varies; therefore, according to the power it is to absorb. On the input resistance element, a proportionately larger resistor is of course required for its much greater power dissipation.
Page 18 Bird Model 8320S Tenuline Attenuator which are attached to its outer surface. These radiating sur- faces dissipate the heat of the coolant into the surrounding air. The Series 8320 may be used for the isolation of power sources up to their maximum power rating and for low level monitoring.
Page 19: Operating Instructions
Chapter 4 Operating Instructions These attenuators, being passive devices, have no indicators Use And Function Of or operating controls. Controls No initial adjustments are necessary other than to connect Initial Adjustments the attenuator to the RF source and load by means of coax- ial cables equipped with suitable matching connector plugs.
Page 20: Operation Under Abnormal Conditions
Bird Model 8320S Tenuline Attenuator ing procedures or surveillance when the stated performance limits are not exceeded. They should function faultlessly, absorbing and converting the excess RF energy into heat in- definitely, if they are properly maintained and not subjected to an overload.
Page 21: Maintenance
Chapter 5 Maintenance Troubleshooting PROBLEM POSSIBLE CAUSE REMEDY Leakage of coolant oil Clamping band not Tighten slightly with a around clamping tight. screwdriver. bands or radiator Faulty input or output Replace housing. O-Ring. Excessive overheating Transmitter power too Reduce transmitter of the radiator.
Page 22: Preventive Maintenance
Bird Model 8320S Tenuline Attenuator sion. Also, occasionally check the coolant level in the radia- tor tank. Preventive Maintenance If there are signs of coolant leakage around the clamping bands, try tightening them. If the leakage persists, it is likely that the O-Ring seal is damaged or deteriorated. Re- place it;...
Page 23: Coolant And Seals
Maintenance 2. Pull the connector straight out of its socket. To replace or examine the coolant oil, proceed as follows: Coolant and Seals Models 8321, 8322 and 8323 1. Carefully raise up the back (output connector) end of the attenuator until the unit is resting on its front (input connector) end.
Page 24: Coolant Level
Bird Model 8320S Tenuline Attenuator 5. Now release and remove the clamping band by loosening the 10-32 screw on its clamping block. 6. Remove the domed end cover assembly, P/N 8325-015, which has a special seal busing ring, P/N 2430-089, sealing the attenuator output housing.
Page 25: Model 8325
Maintenance normal operating conditions. As shipped the coolant is at a factory determined level which should approximately fill the entire cylindrical radiator tank. Expansion of the heated coolant is provided for by the expansion reservoir tank. The vent plug allows the release of excess internal pressure. However, the loss of up to 10 percent of the full radiator tank capacity should not impair the operating efficiently of the attenuator.
Page 26: Rf Connector
Seals, Disassembly. Repairs, beyond what is covered in this instruction book, Repairs will require return of the equipment to Bird Electronic Cor- poration for service. Please consult the factory. Pack and brace the attenuator in a suitable shipping con- Shipment tainer, a sturdy corrugated paper box is satisfactory.
Page 27 Maintenance Replacement Parts List Item Qty. Description Part Number RF section assembly 8321-002 Model 8321 8322-002-1 Models 8322/25 8323-002 Models 8323 Radiator assembly 2400-025 Model 8321 2440-020 Model 8322 2400-015 Model 8323 2430-028 Model 8325 Radiator handle 2400-017 Models 8321/23 2440-009 Model 8322 2430-028...
Page 28 Bird Model 8320S Tenuline Attenuator * Available QC Type Connectors 4240-018 N-Female 4240-062 LT-Female 4240-012 M-Male 4240-063 LT-Male 4240-100 HN-Female 4240-268 C-Female 4240-110 HN-Male 4240-278 C-Male 4240-050 LC-Female 4240-031 UHF-Female (SO-239) 4240-179 LC-Male 4240-025 UHF-Male (PL-259) 4240-002 BNC-Female 4250-125 7/8" EIA Air Line BNC-Male 4240-132 www.valuetronics.com...

This manual is also suitable for:

Tenuline 8321 Tenuline 8322 Tenuline 8323 Tenuline 8325