Frequency Counters
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.Applications include:
Measuring the frequency of a transmitter carrierTo 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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