Input circuit transfer factors:
a) voltage:
,
Where - the voltage at the input of the first amplifier-converter cascade of the receiver;
- EMF of the signal generator equivalent to the antenna-feeder system;
b) by power:
.
Selectivity:
Selective properties of the input circuit are estimated by the selectivity characteristic
,
Where - the transfer coefficient of the input circuit at the resonant frequency;
- transmission coefficient at a given current frequency.
Bandwidth consistent with the width of the spectrum of the useful signal.
Overlap of the required frequency range.
;
Breakdown into subranges is carried out in two ways:
but)
b)
Stability of parameters and characteristics.
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Devices for the reception and processing of radio signals, Transmission, reception and processing of signals
Terms: Devices for the reception and processing of radio signals, Transmission, reception and processing of signals