H - Electricity – 03 – J
Patent
H - Electricity
03
J
H03J 5/02 (2006.01) H03J 1/00 (2006.01) H03J 7/06 (2006.01)
Patent
CA 2046378
ABSTRACT The invention concerns a radio receiving system designed to receive selectively signals from a series of transmitters transmitting at frequencies each in a very narrow frequency band and each separated from the other transmitters by only a small increment of frequency. Such receiving systems are useful for picking up signals from transmitters carried by falcons or other hunting birds. The system comprises a receiving circuit (12), a memory (22, 24) programmed with data representing a set of receiving channels at predetermined frequencies, preferably around 216 MHz, selector means (26) for selecting a channel of the set, tuning means (20, 23) for fine tuning the frequency of a selected channel, electrically programmable memory means (22, 25) for recording fine tuning data relating to each channel, adjusted frequency signal generating means (17) for generating an adjusted frequency signal dependent on the preprogrammed data and the fine tuning data relating to each channel when that channel is selected by the selecting means, and means (15, 16) for using the adjusted frequency signal to control the receiving circuit.
Hi-Trak Systems Limited
Ridout & Maybee Llp
Van Der Veen Albertus C.
LandOfFree
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