Marconi Applied Technologies MG5424 X-Band Magnetron

Marconi Applied TechnologiesMG5424X-Band MagnetronThe data should be read in conjunction with the MagnetronPreamble.DESCRIPTIONCompact, rugged, lightweight, fixed frequency pulsemagnetron, electrically the same as M5187.GENERAL DATAElectricalOperating frequency . . . . . 9410 + 30 MHzTypical peak output power . . . . . . 25 kWCathode . . . . . . . . . . . . indirectly heatedHeater voltage (see note 1) . . . . . . . 6.3 VHeater current at 6.3 V (see note 2) . . . . 0.5 ACathode pre-heating time (minimum)(see note 3) . . . . . . . . . . 60 sInput capacitance . . . . . . . . . . 9.0 pF maxTemperature coefficient of frequency . . . . see note 4MechanicalOutput . . . . . . . . . . . . no. 16 waveguide(22.86 x 10.16 mm internal)Overall dimensions . . . . . . . . . . . see outlineNet weight . . . . . . . . . . . . 0.7 kg approxMounting position . . . . . . . . . . . . . anyMagnet . . . . . . . . . . . . . . . integralA minimum clearance of 25 mm must be maintained betweenthe magnetron and any magnetic materials.Coupler . . . . . . . . . . . . . IEC UBR100Cooling . . . . . . . . . . . . . . . naturalMAXIMUM AND MINIMUM RATINGS(Absolute values)These ratings cannot necessarily be used simultaneously, andno individual rating should be exceeded.Min MaxHeater voltage (see note 1) . . . . . 5.7 6.9 VHeater starting current (peak) . . . . – 3.0 AAnode voltage (peak) . . . . . . . – 8.6 kVAnode current (peak) . . . . . . . 5.0 10 AInput power (mean) (see note 5) . . . – 100 WPulse duration . . . . . . . . . – 2.0 msRate of rise of voltage pulse(see notes 6 and 7) . . . . . . . – 150 kV/msVSWR at the output coupler . . . . – 1.5:1Anode temperature . . . . . . . – 120 8CTYPICAL OPERATIONOperating ConditionsHeater voltage (for operation) . . . . . . 6.3 VAnode current (peak) . . . . . . . . . 8.0 APulse duration . . . . . . . . . . . 0.8 msPulse repetition rate . . . . . . . . 900 ppsRate of rise of voltage pulse . . . . . . 80 kV/msTypical PerformanceAnode voltage (peak) . . . . . . . . . 8.4 kVOutput power (peak) . . . . . . . . 25 kWOutput power (mean) . . . . . . . . 18 WMarconi Applied Technologies Limited, Waterhouse Lane, Chelmsford, Essex CM1 2QU England Telephone: +44 (0)1245 493493 Facsimile: +44 (0)1245 492492e-mail: mtech.uk@marconi.com Internet: www.marconitech.com Holding Company: Marconi p.l.c.Marconi Applied Technologies Inc. 4 Westchester Plaza, PO Box 1482, Elmsford, NY10523-1482 USA Telephone: (914) 592-6050 Facsimile: (914) 592-5148 e-mail: mtech.usa@marconi.com# 2001 Marconi Applied Technologies Limited A1A-MG5424 Issue 3, October 2001181/6142

106 Part II — Statutory Interpretationdoubt. (The experienced interpreter combines the stages, but notionally they are separate.) As LordUpjohn said: 'you must look at all the admissible surrounding circumstances before starting toconstrue the Act' (R v Schildkamp [1971] AC 1, 23).The interpreter of an enactment needs to be someone who is, or is advised by, a person with legalknowledge. This is because an Act is a legal instrument. It forms part of the body of law, andnecessarily partakes of the character of law. It cannot therefore be reliably understood by a lay person.Moreover the meaning of the enactment which is needed by any person required to comply with theAct is its legal meaning.The informed interpretation rule is to be applied no matter how plain the statutory words may seem atfirst glance. Indeed the plainer they seem, the more the interpreter needs to be on guard. A first glanceis not a fully-informed glance. Without exception, statutory words require careful assessment ofthemselves and their context if they are to be construed correctly. A danger of the first glanceapproach lies in what is called impression. When the human mind comes into contact with a verbalproposition an impression of meaning may immediately form, which can be difficult to dislodge.Judges often say that the matter before them is 'one of impression' but it is important that theimpression should not be allowed to form before all surrounding circumstances concerning theenactment in question have been grasped.The informed interpretation rule thus requires that, in the construction of an enactment, attentionshould be paid to the entire content of the Act containing the enactment. It should also be paid torelevant aspects of: (1) the state of the law before the Act was passed, (2) the history of the enacting ofthe Act, and (3) the events which have occurred in relation to the Act subsequent to its passing. Thesemay be described collectively as the legislative history of the enactment, and respectively as the preenacting,enacting, and post- enacting history.Another aspect of the need for an informed interpretation relates to the factual situation in the casebefore the court. In order to determine the legal meaning of an enactment as it applies in a particularcase it is necessary to know the relevant facts of the case and relate them to the factual outline laiddown by the enactment. It is by reference to these that the parties submit to the court their opposingconstructions of an enactment whose meaning is disputed.For the purpose of applying the informed interpretation rule, the context of an enactment thuscomprises, in addition to the other provisions of the Act containing it, the legislative history of thatAct, the provisions of other Acts in pari materia, and all facts constituting or concerning the subjectmatterof the Act. Viscount Simonds said in A-G v Prince Ernest Augustus of Hanover [1957] AC 436,463:

OUTLINE(All dimensions without limits are nominal)5039FGHJSEE NOTE 12 HOLES 1LSEE NOTE 2KMDAT2 HOLES 1NBY S DEEPSEE NOTE 2E2 HOLES 1NSEE NOTE 2FPTQCRRBRefMillimetresA 113.0 maxB 41.53 maxC 36.0 maxD 86.0 maxE 10.0 minF 3.33 maxG 240.0 minH 52.5 maxJ 30.0 maxK 21.5 max4.52 maxL4.37 minM 87.954.39 maxN4.24 minP 20.2 maxQ 5.15 + 0.10R 15.5S 5.00 minT 16.26Lead ConnectionsColourGreenYellowElementHeaterHeater, cathodeOutline Notes1. The mating surface of the magnetron baseplate will be flatto within 0.20 mm.2. Positional tolerance of holes +0.2 mm with respect towaveguide aperture.Whilst Marconi Applied Technologies has taken care to ensure the accuracy of the information contained herein it accepts no responsibility for the consequences of anyuse thereof and also reserves the right to change the specification of goods without notice. Marconi Applied Technologies accepts no liability beyond that set out in itsstandard conditions of sale in respect of infringement of third party patents arising from the use of tubes or other devices in accordance with information contained herein.MG5424, page 4Printed in England# 2001 Marconi Applied Technologies