Questions tagged [frequency-measurement]
Anything related to the measurement of the frequency of periodic signals, i.e. the rate at which their waveform repeats along the time axis. The S.I. unit for frequency is **hertz [Hz]**.
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RF jammer module power measurement using a spectrum analyzer
I have an RF jammer module that works at 2390-2510 MHz. The voltage is 24-28 V and it can transmit up to 50 W.
When I use a spectrum analyzer, the value is around -20 dBm. If I'm not mistaken, -20 ...
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Understanding dBm value of FFT measurements
I am getting familiar with the FFT functionality of my oscilloscope.
I am using a Siglent SDS2204X Plus that has been firmware upgraded to 350 MHz.
Testing of the FFT function involves the use of a ...
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What does the standard deviation of TIE measurement tell me about my clock signal jitter?
When we take a Time Interval Error (TIE) measurement of a clock signal, we are presented with two measurement outputs, the mean error and the standard deviation. When I measured the TIE of a 32....
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How can I convert a sine wave generated by PWM technique into a square wave?
I have generated a variable frequency sine wave by PWM using an Arduino Uno. I want the obtain a square wave using the generated sine wave, so I used an op-amp to remove the DC offset in the sine wave ...
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Frequency meter (counter)
I am currently working on designing a circuit that should be able to measure the frequency of an input signal by giving off a value directly proportional to the frequency at the input.
The circuit ...
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How safe is this TrueRife F-122 frequency generator?
A close friend bought a TrueRife frequency generator in hope of improving health. I'm skeptical of the claimed healing powers, however let's put this aside for a moment; if it helps - great! The ...
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Measuring magnetic fields in the 1-10 Hz range
I apologize in advance but I am a chemist just venturing into the world of electrical, so you may need to explain to me like a 5 year old.
I have a chemistry project that involves the use of AC ...
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Easiest way to get highly-accurate frequency reference?
I just want to check the calibration of my frequency counter, so anything constant under 250 MHz would work(?)
Mains are synced to atomic clocks, to maintain wall clock accuracy, but only ...
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Understanding inductance and its dependency with frequency
I am trying to understand how to design an inductor that has constant parameters over a wide range of frequencies. Especially over high frequencies because I want to use them for impulse testing ...
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Why does the length of an RG-316 coaxial cable affect the crystal resonator frequency response?
I was measuring a 32 [kHz] crystal resonator using a ZURICH HF2LI with 50 ohm input and found that the length of the coaxial cable will affect the frequency response or have a little difference at ...
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Low power low speed pulse divider?
I have a digital input which receives irregular pulses. I want a circuit that takes that input and generates an output pulse for every 100 (or so) input pulse. The expected input speed is 10-300 Hz. I ...
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How to measure the frequency of a low frequency signal?
I am looking to measure the rpm of a wind turbine,
the wind turbine is 3-phase synchronous generator,
the frequency range I am looking to detect is between 1Hz to 60Hz,
I tried to use a frequency ...
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Why is there a high minimum current required for a clamp meter to measure frequency in addition to current?
Modern clamp meters use hall effect sensors to measure AC and DC current and normally calculate True-RMS. But for the meter to display the frequency of the measured current some require significant ...
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Simple detection of a transient FM frequency shift
I have an application with a 2D array of inductive sensors for position detection of an object on a plane. I have experimented with inductance to digital converters (https://www.ti.com/product/LDC1314)...
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How to make fast capacitive touch buttons without a microcontroller
(I have already read this question.)
I am looking to make a musical instrument with a series of capacitive buttons in a grid of 17x4 buttons, with a length of about two feet and a width of three ...
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