IEC 60835-2-3-1992 Methods of measurement for equipment used in digital microwave radio transmission systems part 2 measurements on terrestrial radio-relay syst.pdf

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1、NORME CE1 INTERNATIONALE IEC INTERNATIONAL STANDARD 6083512-3 Premire dition First edition 1992-04 Mthodes de mesure applicables au matriel utilis pour les systmes de transmission numrique en hyperfrquence Partie 2: Mesures applicables aux faisceaux hertziens terrestres Section 3: Dispositifs de bra

2、nchement aux frquences radiolectriques Methods of measurement for equipment used in digital microwave radio transmission systems Part 2: Measurements on terrestrial radio-relay systems Section 3: RF branching networks Numro de rfrence Reference number CEI/IEC 60835-2-3: 1992 Numros des publications

3、Depuis le ler 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 numros ddition 1.0, 1.1 et 1.2 indiquent respectivement la publicat

4、ion de base, la publication de base incorporant lamendement 1, et la publication de base incorporant les amendements 1 et 2. Validit de la prsente publication Le contenu technique des publications de la CE1 est constamment revu par la CE1 afin quil reflte ltat actuel de la technique. Des renseigneme

5、nts 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 publication, ainsi que la liste des publications tablies, se trouvent da

6、ns les documents ci- dessous: F = caractristiques de transfert (voir article 4); I = isolation (voir article 5). 3 Caractristique affaiblissement dadaptation/frquence Voir la CE1 835-1 -2. II convient de mesurer la Caractristique affaiblissement dadaptation/frquence dans la bande passante de chaque

7、accs du dispositif de branchement, les autres accs tant tous connects une charge adapte, un metteur ou un rcepteur. 4 Caractristiques dans la bande 4.1 Perte dinsertion Voir la CE1 835-1-2. II convient de mesurer la perte dinsertion entre les accs Tn et C et entre les accs C et Rn (voir figure l), l

8、a frquence centrale de la bande passante des accs, les autres accs tant tous connects soit une charge adapte, soit a un met- teur ou un rcepteur. Dans certains cas, lorsque les spcifications de lmetteur et du rcepteur renvoient aux accs du circulateur, il convient que les points de rfrence T, . Tn e

9、t R, . R, renvoient galement ces accs. 4.2 Caractristique amplitude/frquence Voir la CE1 835-1 -3. II convient de mesurer la caractristique amplitude/frquence entre les accs T, et C et entre les accs C et R, (voir figure l), dans la bande passante et dans la bande affaiblie de ces accs, les autres accs tant tous connectes soit a une charge adapte, soit un metteur ou un rcepteur.

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