microprocessor-controlled frequency meter (part 0) - an introduction to an exceptional project featured next month in Elektor

an introduction to an exceptiona1 project featured next month in Elektor Features â–  microprocessor-controlled â–  auto-rangin9 â–  alphanumeric display (16 digit) â–  simple to use with menu buttons â–  frequency range: 0.01 Hz.. .1.2 GHz â–  period time measurement: 10 ns. ..100 s â–  pulse time measurement: 0.1 Ns...100 s â–  pulse counter up to 1 x109 â–  high degree of accuracy even given the short time needed for frequency measurements â–  6 or 7 digit accuracy may be selected The circuit for the new Elektor frequency meter is very unusual and because of this it deserves special attention. Totally unlike any other d.i.y. frequency meter, it is, of course, part of our range of test instruments. We will look at it in functional sections, starting with the most unusual part of the circuit: the frequency measuring section. "Normal" frequency meters make use of a crystal-controlled time base supplying an exact measuring time of 1 second, for example. During this "gate time" the ...