A Digital Tuning Indicator

Abstract

A digital tuning indicator for a multiple band heterodyne type receiving device is disclosed which is capable of displaying the frequency to which the receiving device is tuned for AM and FM reception in kilohertz to the nearest kilohertz and in megahertz to the nearest one-tenth megahertz respectively, and of displaying the channel to which the device is tuned when receiving UHF television. The indicating system comprises a counter, the contents of which are periodically displayed. The counter contents are preset to a value which reflects the intermediate frequency of the particular band and a submultiple of the corresponding local oscillator frequency is gated into the counter for a prescribed time interval whereby the resultant sum in the counter at the end of the prescribed time interval reflects the actual received frequency or the corresponding channel number.