Какая частота кварца на приёмнике ?Передача 40 мгц
на приёме 40- 455=39.555 или +455=40.455
Или там не 455?
В принципе верно. Обычно частота кварца приемника меньше частоты кварца передатчика на частоту ПЧ. Хотя возможно сделать частоту кварца приемника и выше частоты TX.
Или там не 455?
Открываете приемник,там на фильтре обычно написано. Можно смотреть хоть фильтр хоть дискриминатор частоты у них одинаковы.
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