Transmission mode and device in wireless outgoing call, automatic frequency conversion, and segmented request signal
A technology of query signal and transmission device, applied in the field of wireless calling industry, can solve the problems of short service life, unsuitable promotion, inconvenient operation, etc., and achieve the effects of low cost, easy implementation and promotion, and less external interference.
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[0020] Embodiment: wireless call automatic frequency conversion subsection inquiry signal transmission device (referring to accompanying drawing), comprise several transmitters and a receiver, be provided with two sets of wireless transceiver units of channel f1 and channel f2 on the receiver; chip U2 and attachment The f1 channel wireless transceiver unit formed by the antenna of the PCB is composed of the f2 channel wireless transceiver unit by the chip U2A and the antenna attached to the PCB, and the chip U2 and the chip U2A are connected with the microprocessor U3; the transmitter includes a power supply, a power supply The connected chip U0 and the antenna attached to the PCB form a wireless transceiver unit, which can change the communication frequency under the control of the microprocessor U1. The chips U2, U2A and U0 are all single-chip radio frequency transceiver nRF905; the working voltage is 1.9~3.6V, and works on three ISM (industry, science and medicine) channels ...
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