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Misurazione FM
42
Misurazione FM
Visualizzazione ed inserimento della frequenza
Per misurare il livello di un segnale di ricezione FM, si deve innanzitutto
inserire la frequenza desiderata.
L’inserimento della frequenza può essere effettuato a passi di 50 kHz
nell’intervallo che va da 44 MHz a 867 MHz.
Sommario dei comandi dell’inserimento della frequenza FM
[2ndF] [FM] Passare alla ricezione FM
[0]...[9] Inserire la frequenza
[ENTER] Confermare l’inserimento
[+] und [-] Modificare la frequenza a passi di 50 kHz
Esempio
Per inserire la frequenza di 99,25 MHz
Premere [2ndF] [FM]..........................(richiamo del menu FM)
poi [9] [9] [./S] [2] [5] [ENTER] ............(inserimento della frequenza)
Display LC:
frequenza: 99,25 MHz
livello: 65,0 dBìV
modalità operativa: FM
Indicazione
Dopo avere richiamato una volta il menu FM, per reinserire la frequenza
si dovrà inserire solo la sequenza delle cifre.
L’ultima impostazione della frequenza rimane invariata dopo lo
spegnimento, se questo è stato eseguito con l’„inserimento di cifre“ e
concluso con „MHz“.
Misurazione del livello
Dopo avere impostato una frequenza, il livello viene misurato
automaticamente ed emesso in dBìV. Il livello d’entrata può essere
misurato nell’intervallo che va da 30 dBìV a 120 dBìV.
Display LC:
frequenza: 104,8 MHz
modalità operativa: FM
livello misurato: 86,5 dBìV
Overflow ed underflow del livello
Il display LC indica underflow ad un livello di <30 dBìV.
Esempio
Frequenza: 104,8 MHz
Modalità operativa: FM
0
ë
+
FR: 99.25 FM
LEV: 65.0dBuV
0
LEV: 86.5dBuV
LEV: ___._dBuV
42


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