Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1974-10-10
1976-02-10
Safourek, Benedict V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 78D, 324 79D, H04B 116
Patent
active
039380483
ABSTRACT:
A multiband radio transceiver capable of operating in the CW, USB, and LSB modes is disclosed including a dual conversion receiver having digital apparatus for displaying the carrier frequency of the signal to which the transceiver is tuned. A mixer is included for deriving a premix signal related in frequency to the frequencies of two local oscillator signals. The display apparatus includes a counter for counting the frequency of the premix signal. In order to provide a direct display of the tuned signal carrier frequency, a number which varies according to the intermediate frequency of the signal to which the transceiver is tuned is loaded into the counter prior to occurrence of the counting operation. Apparatus is provided for loading the proper number into the counter in accord with the operating mode of the transceiver.
REFERENCES:
patent: 3701951 (1972-10-01), Krausser
patent: 3753119 (1973-08-01), Close
patent: 3758853 (1973-09-01), Dionne
Crane John D.
Heath Company
Safourek Benedict V.
Sherman William R.
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