| 摘要 |
A radio receiver including means for receiving a radio signal, first moans 5-8 for beating the signal to zero intermediate frequency in phase and quadrature shifted signals, means for amplifying the in phase and quadrature zero shifted intermediate frequency signals, second means 13-16 for boating the amplified intermediate frequency signals to predetermined non-zero intermediate frequency in phase and quadrature shifted signals, means 17 for summing said non- zero signals, and means for applying the summed signals to a discriminator 20 to obtain an output signal. Use in a pager is described. Also described are AFC, a vibrational signal-reception alert, means for substituting a lower power peripheral for a high power one when the battery is low, message priority arrangement on display and control command reception. <IMAGE>
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