Frequency-modulated broadcast secondary sideband paging equipment
The frequency-modulated broadcast secondary sideband paging equipment is composed of paging station and receiver. Said paging station is implemented by using frequency-modulated broadcast transmitterinstallation, and adding computer network and modulator. Said receiver is composed of antenna, FM dem...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The frequency-modulated broadcast secondary sideband paging equipment is composed of paging station and receiver. Said paging station is implemented by using frequency-modulated broadcast transmitterinstallation, and adding computer network and modulator. Said receiver is composed of antenna, FM demodulating device, secondary demodulating device, chip microcomputer CPU and indicator which are series-connected. Its computer network uses secondary sideband FSK modulator and mixed circuit, and the FM demodulating device is made up by series-conencting high-amplifier, mixing filter, intermediatefrequency filter and FM demodulator, and its secondary demodulating device is implemented by using MC 3374 circuit. |
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