Bird-technologies 4314B Manual de usuario Pagina 1

RF DIRECTIONALTHRULINE® WATTMETERModel 4314B©Copyright 2012 by Bird Electronic CorporationInstruction Book Part Number 920-4314B Rev. FThruline is a r

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xiiiTable of ContentsSafety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iiiSafety Symbols . . . . . .

xivChapter 5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Cleaning . . . . . . . . . . . . . . . . . . . .

1Chapter 1 IntroductionPurpose and FunctionThe Model 4314B Thruline Wattmeter is an insertion- type RF wattmeter designed to measure power flow and lo

2Power RequirementsThe Model 4314B can operate from two different power sources. The wattmeter comes supplied with two 9 V alkaline batteries which ty

3Chapter 2 InstallationPortabilityThe Model 4314B is a portable instrument; the housing is not designed for fixed mounting. A strap is provided for ca

4Figure 1 Model 4314B Outline DrawingCAUTIONSevere damage to the Plug-In Element or wattmeter can result from exposure to excessive RF power. Make s

5Chapter 3 Theory of OperationTraveling Wave ViewpointThe operation of this wattmeter is based on the travelling wave concept of RF transmission. As R

6Peak Power OperationThe Model 4314B is designed to measure peak power in addition to average power. When the toggle switch is placed in peak mode, ba

7Figure 2 Schematic Diagram - ElementRF Coaxial LineXMTRorLOADLOADorXMTRDirectional CouplingDiodeDetector ElementMeterDC ContactCircuit Board

8Figure 3 Model 4314B Schematic Diagram

9Component DescriptionFigure 4 Component DiagramThrulineWATTMETERMODEL4314BSERIALXXXXBIRDELECTRONICCORPORATIONCLEVELAND(SOLON), OHIODANGERRF VOLTAGE

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11Chapter 4 Operating InstructionsZero Adjust MeterBefore taking any readings with the wattmeter, it is necessary to zero the meter under no-power con

12Plug-In Element Selection and InsertionThe elements determine the power range to be read on the meter scale. The major markings (50 W, 100 W, etc.)

13Load power Where an appreciable amount of power is reflected, as with an antenna, it is necessary to subtract the reflected from the forward power t

14Figure 5 VSWR Conversion Nomograph1015200.51.01.52.02.53.04.05.02530 4050100 150 200300 4005.2.4.6.81.01.21.41.61.82.0468101214161820VSWR=1+Reflec

15Figure 6 VSWR Conversion Nomograph1015200.51.01.52.02.53.04.05.02530 4050100 150 200300 400500.01.02.03.04.05.06.07.08.09.1.2.3.4.5.6.7.8.91.03.02

16Making Low Reflection ReadingsIt is sometimes desirable to make more accurate low reflection readings. This can be done using a more sensitive eleme

17Attenuation By Open Or Short CircuitAttenuation can also be determined by the open circuit method. The test set exhibits good equality between forwa

iiiSafety PrecautionsThe following are general safety precautions that are not necessarily related to any specific part or procedure, and do not neces

18Figure 7 Graph Converting Carrier Power and Peak Power to Percent

19Performance NotesAlthough the Model 4314B Thruline Wattmeter is equipped with Quick-Change connectors, it must be remembered that the power rating a

20Figure 8 Cable Wavelength Matching GraphShutdown When all measurements are completed, be sure to set the CW/Peak switch to CW mode and the ON/BATT

21Chapter 5 MaintenanceCleaningIf any of the contacts or line connectors become dirty, they should be cleaned with a good contact cleaner or dry clean

22If there is evidence of contamination inside the line section, the reachable por-tions should be cleaned and the interior carefully blown out. Do no

23No meter indication(PEAK only).Faulty instrumentation moduleReplace the input connector, see “Replacing the Meter” on page 25.Dead or low battery Te

24Battery ProceduresTesting the BatteriesThe Model 4314B Thruline Wattmeter uses two 9 V alkaline batteries to supply power for the peak circuitry. 1.

25Replacing the Meter1. Remove the back cover by unscrewing the four 8-32 Phillips flat head screws.Note: The screws are located two on each side of t

26Replacing the Instrumentation Module1. Remove the back as above in meter replacement. Note: The instrumentation module contains the line section and

27Figure 11 Replacing the Instrumentation ModuleReplacing the Quick-Change Connectors1. Remove the four 8-32 screws from each corner of the square f

ivSafety SymbolsNote: Calls attention to supplemental information.Warning StatementsThe following safety warnings appear in the text where there is da

28Calibrating the WattmeterZero adjustment of the meter is the only calibration required for the 4314B. This should be done any time the meter pointer

29Customer ServiceAny maintenance or service procedure beyond the scope of those in this chapter should be referred to a qualified service center.If y

30Specifications\Impedance 50 ohms nominalInsertion VSWRWith “N” Connectors 1.05 Max. to 1000 MHz, 1.1 Max. to 2300 MHzConnectors Bird Quick Change “Q

31Replacement Parts*Available QC Type ConnectorsItem Quantity Description Part Number1 1 Housing assembly 4314-1032 1 Instrumentation module 4314-2023

32Figure 13 Replacement PartsInside Back+123456789

33Limited WarrantyAll products manufactured by Seller are warranted to be free from defects in material and workmanship for a period of one year, unle

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vOn page 4.On pages 11 and 21.On page 11.On page 16.On page 26.CAUTIONSevere damage to the Plug-In Element or wattmeter can result from exposure to ex

viSafety StatementsUSAGEANY USE OF THIS INSTRUMENT IN A MANNER NOT SPECIFIED BY THE MANUFACTURER MAY IMPAIR THE INSTRUMENT’S SAFETY PROTECTION.USOEL U

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

viiiRF 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&

ixAbout This ManualThis manual covers the operating and maintenance instructions for the follow-ing models:Changes to this ManualWe have made every ef