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1、NORME INTERNATIONALE INTERNATIONAL STANDARD CE1 IEC 6023518 Premire dition First edition 1972-01 Mes u re des caractristiques elect riq ues des tubes pour hyperfrquences H u it im e part e: Tubes onde rgressive - Type O Measurement of the electrical properties of microwave tubes Part 8: Backward-wav
2、e oscillator tubes - “O” type Numro de rfrence Reference number CEI/IEC 60235-8: 1972 Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/06/2007 06:12:39 MSTNo reproduction or networkin
3、g permitted without license from IHS -,-,- Numros des publications Depuis le 1 er janvier 1997, les publications de la CE1 sont numrotes partir de 60000. Publications consolides Les versions consolides de certaines publications de la CE1 incorporant les amendements sont disponibles. Par exemple, les
4、 numros ddition 1.0, 1.1 et 1.2 indiquent respectivement la publication de base, la publication de base incorporant lamendement 1, et la publication de base incorporant les amendements 1 et 2. Validit de la presente publication Le contenu technique des publications de la CE1 est constamment revu par
5、 la CE1 afin quil reflte ltat actuel de la technique. Des renseignements relatifs la date de reconfir- mation de la publication sont disponibles dans le Catalogue de la CEI. Les renseignements relatifs des questions ltude et des travaux en cours entrepris par le comit technique qui a tabli cette pub
6、lication, ainsi que la liste des publications tablies, se trouvent dans les documents ci- dessous: for example 400 ps. or as a period of time for a stated frequency drift. In the latter case, the frequency drift is measured from tl and the result of the measurement is t2 - tl. The result may also be
7、 expressed as the ratio of (i) the frequency drift in a stated time period (or the time required to traverse a stated frequency drift) to (2) the amplitude of the applied voltage pulse. Precniitions The level part of the pulse of the xoltage of the slow-wave structure during which the measurement of
8、 frequency drift is made, should be stable, since the drift being measured is of the order of a few tens of kHz. Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/06/2007 06:12:39 MSTN
9、o reproduction or networking permitted without license from IHS -,-,- - IL - 2.12 Drive de frquence aprs lu mise en fonctionnement Le tube est connect comme il est indiqu la figure 4, page 15, et est mis en fonction- nement, dune manire typique, la partie infrieure de la bande jusqu ce que la frquen
10、ce soit stabilise. On passe alors la partie suprieure de la bande. On note la frquence instantane et lon enregistre la variation de frquence, qui est la drive de frquence aprec la mise en fonctionnement. Les valeurs typiques sont 1 MHz a 3 MHz. Note. - Cette drive est influence par les proprits de d
11、ilatation thermique du tube et est affecte par les vanations de puissance dissipe qui sont une consquence des proprits daccord lectronique du dispositif. 2.13 Drive de frquence lu mise en fonctionnement Le tube est connect comme il est indiqu a la figure 4. La tension de filament est applique pendan
12、t le temps spcifi. Les tensions danode et dhlice sont appliques et rgles la frquence et la puissance de sortie normales, pour une frquence quelconque de la bande de fonctionnement du tube. On enregistre alors la frquence du TOR intervalles de temps appropris pendant une dure suffisante pour atteindr
13、e lquilibre. Le rsultat de la mesure est la variation totale de frquence entre la mesure initiale et la mesure finale. Les valeurs typiques sont 1 MHz 2 MHz. 2.14 Sensibilit aux effets magntiques extrieurs On utilise le montage de la figure 1, page 14. On dplace autour du tube, et la distance indiqu
14、e par le constructeur, le matriau ferromagntique spcifi (plaque dacier doux par exemple) de dimensions spcifies, ou le matriau magntique (aimant de nuance et de dimensions spcifies et aimant saturztion par exemple). On mesure les variations maximales de puissance de sortie r.f. et, ventuellement, le
15、s variations de frquence. Ces variations sont une mesure de la sensibilit du tube aux effets magntiques extrieurs. 2.15 CoefJicient de temprature de lu fr-quence Voir Publication 235-2 de la CEI, paragraphe 7.3 Copyright International Electrotechnical Commission Provided by IHS under license with IE
16、CLicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/06/2007 06:12:39 MSTNo reproduction or networking permitted without license from IHS -,-,- - 13 - 2.12 2.13 2.14 2.15 Post-tuning frequency drift The tube is connected as shown in Figure 4, page 15, and is typically operate
17、d at the low end of the band until the frequency is stabilized. The tube is then switched to the high end of the band. The instantaneous frequency is noted and the subsequent frequency change is recorded. This is the post-tuning frequency drift. Typical values are 1 MHz to 3 MHz. Nore. - This drift
18、is influenced by the thermal expansion -properties of the tube and is affected by the variations of the dissipated power that are a consequence of the electronic tuning properties of the device. Turn-on frequency drift The tube is connected as shown in Figure 4. The filament voltage is applied for t
19、he stated period. The anode and helix voltages are turned on and adjusted for normal power output and at some frequency in the operating band of the tube. The frequency of the tube is then recorded at suitable times in a period sufficient to result in equilibrium. The result of the measurement is th
20、e total change in frequency from initial to final measurement and typical values are 1 MHz to 2 MHz. Sensitivity to external magnetic effeets The circuit shown in Figure 1, page 14, is used. Ferromagnetic material (e.g. mild steel plate) of stated dimensions, or magnetic material (e.g. a magnet of s
21、tated steel grade) of stated dimensions and magnetized to saturation, is moved around the tube at the distance indicated by the manufacturer. Themaximum variations in r.f. output power, and also any frequency variations, are measured. These variations are a measure of the sensitivity of the tube to
22、external magnetic effects. Temperature eoeficient of frequency See IEC Publication 235-2. Clause 7.3. Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/06/2007 06:12:39 MSTNo reproduct
23、ion or networking permitted without license from IHS -,-,- - 14 - Alimentation et modulateur Supply and modulator - Dphaseur - Coupleur directif Charge et wattmetre Tube en mesure measured Phase shifter Directional coupler - Load and wattmeter - Tube being - Tension ligne Slow-wave-structure voltage
24、 H Dtecteur Ondemtre V FIG. 1. - Schma de montage gnral. General circuit diagram. 1 c Temps FIGURE 2a Time Frquence Fret mcv Oscilloscope 1 F F FIG. 2. Mesure de drive de frquence en impulsion. Measurement of pulse frequency drift. Copyright International Electrotechnical Commission Provided by IHS
25、under license with IECLicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/06/2007 06:12:39 MSTNo reproduction or networking permitted without license from IHS -,-,- - 15 - Enregistreur bande Chart recorder Autres alimentations Other supplies lectronique Electronic counter num
26、rique- analogue Digital-analog convertor I Tube en mesure Tube being measured Mlangeur Amplificateur f. i. Discriminateur I. F. amplifier Discriminator Alimentation de ligne module en impulsions Pulse-modulated supply to slow-wave structure I Oscillateur local Local oscillator I Oscilloscope FIG. 3.
27、 - Montage pour la mesure de drive de frquence en impulsion. Block diagram of the circuit for the measurement of pulse frequency drift. Rgulateur Convertisseur du courant Tube en mesure hyperfrquences Attnuateur Microwave de cathode Tube being Cathode current measured Attenuator frequency regulator
28、convertor Alimentation stabilise Regulated power - I Convertisseur 1 FIG. 4. - Schma de montage pour la mesure de la drive de frquence i la mise en fonctionnement et pour la drive de frquence aprs la mise en fonctionnement. Block diagram of the circuit for the measurement of turn-on frequency drift
29、and post-tuning frequency drift. Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/06/2007 06:12:39 MSTNo reproduction or networking permitted without license from IHS -,-,- Copyright
30、International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/06/2007 06:12:39 MSTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Electrotechnical Commission P
31、rovided by IHS under license with IECLicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/06/2007 06:12:39 MSTNo reproduction or networking permitted without license from IHS -,-,- ICs 31.100 Typeset and printed by the IEC Central Office GENEVA, SWITZERLAND Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/06/2007 06:12:39 MSTNo reproduction or networking permitted without license from IHS -,-,-
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