Jobs was building a frequency counter and needed some parts.

Higher frequencies are usually measured with a frequency counter.

Later the company developed miniature digital voltmeters and frequency counters.

(a) The base frequency counter, wrapping around every period.

Frequency counters can currently cover the range up to about 100 GHz.

Frequency counters or high frequency heterodyne systems can be used.

Its positive feedback has a faster transition, so it is used in timing applications such as frequency counters.

Most frequency counters work by using a counter which accumulates the number of events occurring within a specific period of time.

Frequency counter tutorial including how they work.

(c) The resonance frequency counter used as a sine wave readout.

If the two signals are close together in frequency the heterodyne is low enough to be measured by a frequency counter.

Microwave frequency counters can currently measure frequencies up to almost 100 GHz.

The accuracy of a frequency counter is strongly dependent on the stability of its timebase.

Frequency counters usually measure the number of oscillations or pulses per second in a repetitive electronic signal.

A frequency counter is an electronic instrument, or component of one, that is used for measuring frequency.

Most general purpose frequency counters will include some form of amplifier, filtering and shaping circuitry at the input.

Electronics hobbyists were moving on to digital projects such as digital voltmeters and frequency counters.

Breaking with tradition, the HRO-600 used a frequency counter instead of a micrometer tuning dial.

(d) The inverted base frequency counter.

Nixies were used as numeric displays in early digital voltmeters, multimeters, frequency counters and many other types of technical equipment.

Frequency counter (Measures frequency)

"Not only did he give me the parts, but the following summer he saw that I had a job in the division of the company that made frequency counters."

Above the range of frequency counters, frequencies of electromagnetic signals are often measured indirectly by means of heterodyning (frequency conversion).

(b) The resonance frequency counter at a slightly higher frequency, being reset (or "synced") when the base counter wraps around.

I/O interfaces allow the user to send information to the frequency counter and receive information from the frequency counter.