Frequency marker display system

Details Frequency marker display system Frequency marker display system

1980-03-31

1981-12-15

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

324 77C, G01R 2316

Patent

active

043061869

ABSTRACT:
A frequency marker display system for displaying markers on a display device such as a cathode ray tube includes means for generating gating pulses whereby only a desired pair of frequency markers, appearing on each side of a center frequency marker, are displayed. Selection of the side frequency markers is accomplished by an operator-actuated switch which produces a DC signal, this DC signal being compared with the level of a sweep repetition rate controlling signal, and said gating pulses are produced when the levels of said DC signal and that of said sweep repetition rate controlling signal coincide.

REFERENCES:
patent: 3304494 (1967-02-01), Palatinus
patent: 3360724 (1967-12-01), Guros et al.
patent: 3771061 (1973-11-01), Bayer
patent: 3876946 (1975-04-01), La Clair

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