Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for BIRD 4308
Summary of Contents for BIRD 4308
- Page 1 INSTRUCTION BOOK RF DIRECTIONAL THRULINE® WATTMETER MODEL 4308 ©Copyright 2011 by Bird Electronic Corporation Instruction Book Part Number 920-4308 Rev. E Thruline® and Termaline® are registered trademarks of Bird Electronic Corporation...
- Page 2 THIS page intentionally left blank...
-
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. WARNING Keep Away From Live Circuits Operating Personnel must at all times observe general safety... -
Page 4: Safety Symbols
Bird 4308 Thruline Wattmeter WARNING Resuscitation Personnel working with or near high voltages should be familiar with modern methods of resuscitation. WARNING Remove Power Observe general safety precautions. Do not open the instrument with the power on. Safety Symbols WARNING Warning notes call attention to a procedure, which if not correctly performed, could result in personal injury. -
Page 5: Warning Statements
Warning Statements The following safety warnings appear in the text where there is dan- ger to operating and maintenance personnel, and are repeated here for emphasis. WARNING Leaking RF energy is a potential health hazard. Never attempt to connect or disconnect equipment from the transmission line while RF power is being applied. -
Page 6: Safety Statements
Bird 4308 Thruline Wattmeter Safety Statements USAGE ANY USE OF THIS INSTRUMENT IN A MANNER NOT SPECIFIED BY THE MANUFACTURER MAY IMPAIR THE INSTRUMENT’S SAFETY PROTECTION. EL USO DE ESTE INSTRUMENTO DE MANERA NO ESPECIFICADA POR EL FABRICANTE, PUEDE ANULAR LA PROTECCIÓN DE SEGURIDAD DEL INSTRUMENTO. - Page 7 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...
- Page 8 Bird 4308 Thruline Wattmeter RF VOLTAGE MAY BE PRESENT IN RF ELEMENT SOCKET - KEEP ELEMENT IN SOCKET DURING OPERATION. DE LA TENSION H.F. PEAT ÊTRE PRÉSENTE DANS LA PRISE DE L'ÉLÉMENT H.F. - CONSERVER L'ÉLÉMENT DANS LA PRISE LORS DE L'EMPLOI.
-
Page 9: About This Manual
Theory of Operation — Describes how the 4308 Wattmeter works and Installation — Describes how to set up and prepare the 4308 Wattme- ter for use. Operation - All instructions necessary to operate the equipment appears in this chapter. -
Page 10: Table Of Contents
Table of Contents Safety Precautions ......... i Safety Symbols . - Page 11 Replacement Parts ..........21 Available “QC”...
-
Page 13: Chapter 1 Introduction
Chapter 1 Introduction Purpose and Function The Model 4308 Thruline Wattmeter is a portable multi-range RF wattmeter. It is a device which requires no external power source or batteries for operation. It is used to measure RF power when inserted into a transmission line of 50 ohms impedance. - Page 14 Bird Model 4308 Wattmeter...
-
Page 15: Chapter 2 Theory Of Operation
Chapter 2 Theory of Operation Travelling Wave Viewpoint The operation of the Model 4308 wattmeter is based on the travelling wave concept of RF transmission. As RF power is applied to a transmission line, there is a forward wave travelling from the transmitter to the load and a reflected wave travelling from the load back to the transmitter. -
Page 16: Power
Bird Model 4308 Wattmeter Figure 1 Model 4308 Outline Drawing RUBBER FEET (4) Q.C. CONNECTOR 6-7/8 (175mm) TRANSIT ELECTRONIC 50 W 440-960 MHz 4308-1 4240-156 1-3/4 (44mm) 1-5/16 (33mm) 3-3/8 4" RUBBER FEET(4) (86mm) (101mm) 3-5/8 (92mm) 3-29/32 (99mm) Power... -
Page 17: Coupling Circuit
Bird Model 4308 Wattmeter Coupling Circuit The coupling circuit which samples the travelling waves is in the Plug-In Element. The circuitry of the element and its relationship to the other components of the Thruline Wattmeter are illustrated in the schematic diagram, see figure 2. - Page 18 Bird Model 4308 Wattmeter Figure 2 Schematic Diagram RF Coaxial Line XMTR LOAD LOAD XMTR Diode Directional Coupling Meter Detector Element DC Contact Circuit Board...
-
Page 19: Chapter 3 Installation
The voltmeter circuitry or microammeter, even though it is shock mounted, may be damaged by severe impact. The Model 4308 is a portable instrument, and the housing is not designed for fixed mounting. A strap is provided for carrying purposes. - Page 20 Bird Model 4308 Wattmeter Note: It makes no difference which sides the RF power source and the load are connected. Note: Use of a short length of 50 ohm cable fitted with the appropriate mating connectors may be useful when inserting the wattmeter in the transmission line.
-
Page 21: Chapter 4 Operation
A description of the features of the Thruline Wattmeter have been dis- cussed in the previous sections. Read and become familiar with the following instructions before operating the Model 4308. As mentioned, no batteries or external power sources are required to operate the meter. -
Page 22: Range Switch And Power Measurement
– This correction is negligible (less than one percent) if the load is such as to have a VSWR of 1.2 or less. Good load resistors, such as Bird Ter- maline Load Resistors, will produce a negligible or unreadable reflected power. - Page 23 Bird Model 4308 Wattmeter Figure 5 VSWR Conversion Nomograph, Sheet 1...
- Page 24 Bird Model 4308 Wattmeter Figure 6 VSWR Conversion Nomograph, Sheet 2...
-
Page 25: Chapter 5 Maintenance
Chapter 5 Maintenance Troubleshooting Use the following table to aid in isolating problems, their possible cause, and corrections. Problem Possible Cause Corrective Action No meter reading No RF power Check RF source and cables “Arrow” on element Rotate element pointing wrong way. No pick-up from DC Adjust contact finger contact finger. -
Page 26: Cleaning
Repair and Replacement Although the Model 4308 is designed to for long term, trouble free operation. In the case of malfunction of the unit, the repair or replace- ment procedures in this section should be followed. -
Page 27: Line Section Or Element Coupling Circuit
Bird Model 4308 Wattmeter Line Section or Element Coupling Circuit If a problem should occur in the line section or element coupling cir- cuit, it is advised that the unit be returned to Bird Electronic Corpora- tion for repair and recalibration. Meter Housing For access to the inside of the meter housing, the back cover must be taken off. -
Page 28: Connector Replacement
7. Reassemble the unit by reversing the above procedures. Connector Replacement The Model 4308 is normally supplied with two Female TNC Bird Quick-Change Connectors. Other “QC” connectors are available. These connectors may be obtained from Bird Electronic Corporation. -
Page 29: Element Removal
Bird Model 4308 Wattmeter Element Removal 1. Remove the screw and sleeve on the lower left corner of the ele- ment port flange. 2. Grasp the knurled part of the element knob and gently pull up while turning slightly in a clockwise direction. -
Page 30: Calibration Checks
10. Tighten the fastening screws. Calibration Checks If a calibration check of the Model 4308 is necessary, set-up the Model 4308 Wattmeter in series with a standard wattmeter of a known accuracy. Example - A Bird Model 43 Thruline Wattmeter could be used. -
Page 31: Customer Service
If the unit needs to be returned for any reason, request an RMA through the Bird Technologies website. All instruments returned must be shipped prepaid and to the attention of the RMA number. -
Page 32: Specifications
(99 mm x 102 mm x 175 mm) With Female “TNC” Connectors 3-29/32" L x 5" W x 6-7/8" H (99 mm x 127 mm x 175 mm) Connectors Bird Quick Change “QC” type, Female TNC normally supplied. Operating Position Finish Grey Powder Coat... -
Page 33: Replacement Parts
Bird Model 4308 Wattmeter Replacement Parts Item Qty. Description Part Number Micrometer Meter 2120-017 Housing Assembly 4410-003 Cover Assembly 4210-005-1 Line Section Assembly 4308-003 Carrying Strap 8580-003 RF Connectors *See table Meter Bumper Feet 4220-098 Range Switch Knob 5-1852 Range Switch Label... - Page 34 Bird Model 4308 Wattmeter Available “QC” Type Connectors Connector Part Number N-Female 4240-062 N-Male 4240-063 HN-Female 4240-268 HN-Male 4240-025 LC-Female 4240-031 LC-Male 4240-025 BNC-Female 4240-125 BNC-Male 4240-132 SMA-Female 4240-336 SMA-Male 4240-334 7/8” EIA 4240-002 1-5/8” EIA Fixed 4240-096 7/16” EIC (Jack)
-
Page 35: 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 specified, from date of shipment and to conform to applicable specifications, drawings, blueprints and/or samples. Seller’s sole obligation under these warranties shall be to issue credit, repair or replace any item or part thereof which is proved to be other than as warranted;... - Page 36 warranty. In addition, Seller’s warranties do not extend to the failure of tubes, transistors, fuses and batteries, or to other equipment and parts manufactured by others except to the extent of the original man- ufacturer’s warranty to Seller. The obligations under the foregoing warranties are limited to the pre- cise terms thereof.
Need help?
Do you have a question about the 4308 and is the answer not in the manual?
Questions and answers