![]() ![]() Since all radios generate some out-of-band signals, there is usually some degree of filtering to make sure that those signals are kept to a minimum. Just to answer the second part of the question, you do not want an amplifier that has too wide a bandwidth, mainly to lower the complexity (and hence also the cost) of the amplifier.Īll users of radio spectrum (including radio amateurs) must not cause any interference to other users of the radio spectrum, and that means that out-of-band transmissions must be kept to an absolute minimum.
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