Frequency marker display system
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United States of America Patent
Stats
-
Dec 15, 1981
Grant Date -
N/A
app pub date -
Mar 31, 1980
filing date -
Mar 31, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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