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A frequency counter is an electronic instrument that is used for measuring frequency. They usually measure the number of oscillations or pulses per second in a periodic electronic signal. The frequency counter is simple to use, you just turn the counter on and apply the signal to the input. They can be used for measuring many signals from digital logic signals to RF and microwaves.

### General guidelines on using a Frequency Counter
- Do not overload input: This may occur when using some RF frequency counters that may have a 50Ω input.
- Keep frequency counter time-base / clock warm: The time-base of clock within a frequency counter governs the overall accuracy of the instrument.
- Requires accurate time-base: As the accuracy of the time-base directly reflects onto the accuracy of the measurement, it is necessary to use an instrument with an accurate time-base, or use an external one that is very accurate.
- Calibrate: With various aspects such as crystal ageing that affects even the most accurate crystal- based clock oscillators or time-bases, it is necessary to ensure that the time-base frequency is maintained as accurately as possible and all other functions are operating within their specified ranges.
- For noisy signals, pay attention to trigger error: When using a frequency counter or timer with a noisy signal, the noise can cause spurious counts which affects the reading.
- Lock all time-bases to a single clock: When a system uses several time-bases, there are possibilities of uncertainty between the signals that can cause some inaccuracies. To overcome this, it is often wise to lock all the elements of a system to a single accurate time-base.

### Applications include:
- Measuring the frequency of a transmitter carrier
- Measuring the frequency of an oscillator in a circuit
- Measure the frequency of a signal on a line
- Any application where the frequency of a steady repetitive signal needs to be measured

To be able to measure the frequency of an RF signal using a frequency counter there are a few prerequisites.

- Frequency must be steady, i.e. not varying
- The signal should not have modulation applied as this prevents proper counting
- Signal must have sufficient amplitude – typically signals over about half a volt are suitable
- Signals should not be so large that they overload the input

Frequency counters are an easy to use test instrument, have few problems and give accurate results.



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Frequency Counters | Frequency Measurer | RS

Frequency Counters

Aim-TTi TF930 Frequency Counter, 0.001 Hz Min, 3GHz Max, 10 Digit...

Aim-TTi PFM3000 Frequency Counter, 3 Hz Min, 3GHz Max, 6 Digit Resolution

Aim-TTi TF960 Frequency Counter, 0.001 Hz Min, 6GHz Max, 10 Digit...

Aim-TTi PFM3000 Frequency Counter, 3 Hz Min, 3GHz Max, 6 Digit...

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Tektronix Frequency Counters | RS

<p>Frequency counters are a type of electronic instrument used for measuring frequencies, most commonly in terms of number of oscillations (pulses) per second across a periodic electronic signal. Tektronix is one of our leading brands in signal generator and analysis technology.</p><h2>Why choose a Tektronix frequency counter?</h2><ul><li>Tektronix is a leading measurement insight company with a global reputation for build quality and accuracy</li><li>The brand has been committed to developing and manufacturing high performance frequency counters and other measurement equipment for more than 70 years, and now operates worldwide from premises in 21 countries</li><li>Tektronix measurement products are designed in house, with the aim of combining the latest technological advances with ever greater ease, speed and accuracy of use</li><li>Today, the brand is a go-to name for professional scientists, engineers and technicians across a great many demanding industries and sectors</li><li>Typical settings in which you might find professionals using Tektronix frequency counters might include healthcare, communications, automotive and aerospace engineering</li></ul><p>These frequency counters are impressively straightforward to use. After turning the counter on and applying the signal to the input, they'll deliver accurate readouts across many different signal types - ranging from digital logic signals to RF (radio frequency) and microwaves - depending on the model that best suits your specific needs and application.</p><p>Common uses of a Tektronix frequency counter in everyday modern workplaces and engineering environments might include:</p><ul><li>Measuring the frequency of a transmitter carrier</li><li>Measuring the frequency of an oscillator in a circuit</li><li>Measure the frequency of a signal on a line</li><li>Any application where the frequency of a steady repetitive signal needs to be measured</li></ul>

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Keysight Technologies Frequency Counters | RS

<p>Keysight Technologies frequency counters are ideal for applications where you need to make reliable and accurate time and frequency measurements, and you need to do it quickly. Keysight frequency counters provide the high quality performance and results you need. Keysight Technologies frequency counters are test and measurement instruments that measure the frequency of electrical signals. They accurately and reliably report on the number of oscillation cycles that happen within a specific time period. Keysight Technologies frequency counters are easy to use, you simply turn the counter on and apply the signal to the input.</p><h2>What applications are Keysight Technologies frequency counters most suitable for?</h2><p>Keysight frequency counters are ideal for measuring the frequency of multiple devices including transmitter carriers, oscillators in circuits, signals on a line, steady repetitive signals and more.</p><h3>What are some general guidelines to adhere to when using a Keysight Technologies frequency counter?</h3><p>When using a frequency counter from Keysights range, its important to stick to some general guidelines that will ensure you get the accuracy and results that you require. When using a Keysight frequency counter, ensure that you do not overload input, keep the frequency counter clock warm, calibrate the device and for noisy signals, pay attention to any trigger errors that may occur.</p>

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Aim-TTi Frequency Counters | RS

Need to make accurate frequency measurements? Aim-TTi frequency counters can do just that. Aim-TTi are a well-known manufacturer who offer high-quality and reliable test and measurement instruments, including frequency counters. A frequency counter is a precision instrument that measures the frequency of an input signal. Aim-TTi frequency counters are simple and easy to use, which helps you carry out your application efficiently with precision.<h2>What are frequency counters used for?</h2>Aim-TTi frequency counters can be used across many different fields and applications. Whether its telecommunications, electronics, or laboratory research, Aim-TTi have got you covered. Some common applications of frequency counters include:<ul><li> Measuring the frequency of oscillators within a circuit, signal generators, transmitter carriers, and other components.</li><li> Measuring the frequencies of transmitted and received signals.</li><li> Identifying frequency related issues within communication systems.</li><li> Ensure measurement instruments or devices are accurate during instrument calibration.</li><li> Wherever frequency is a critical factor, frequency counters can be used to monitor and control the frequencies.</li><li> Monitor broadcast frequencies.</li><li> To measure the frequency of RF signals.</li></ul>Aim-TTi frequency counters can perform these applications with great precision and accuracy. Utilise what Aim-TTi have got to offer and browse their range of trustworthy and advanced frequency counters.

Aim-TTi Frequency Counters

What are frequency counters used for?

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