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RXRL-NV Technical and Maintenance Manual
R.V.R. Elettronica S.r.l. (Bo)
Pag. 80
CAPITOLO 5
PROCEDURA PER LA TARATURA
5.1 INTRODUZIONE
E’ MOLTO IMPORTANTE PER OTTENERE UNA BUONA TARATURA PORTARE IL
DISPOSITIVO ALLA TEMPERATURA DI LAVORO.
5.2 TARATURA DEL FRONT-END MIXER
Per effettuare questa taratura occorre collegare l’equipaggiamento
come mostrato nel SETUP1:
1)
Iniettare, tramite il generatore di segnali collegato all’ingresso
RF, un segnale a -10dBm, con frequenza uguale a quella di lavoro
del ricevitore.
2)
Verificare sull’oscilloscopio di ottenere il massimo livello
possibile della IF 10,7MHz controllandone anche l’esatta frequenza
(se la frequenza non risultasse giusta agire sui compensatori C27
e C28 posti sulla scheda PLL). Per ottenere il massimo livello di
IF 10,7MHz agire sui due filtri FIL1 e FIL2 posti sul Front-End
Mixer(è consigliabile agire prima sul 2° e 5° compensatore).
SETUP 1
Содержание RXRL-NV
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