high frequency measurement - Page 1
Forum section: electronics / rf-microwave

author: harrysmith
author_rank: Contributor
timestamp: March 08, 2021, 01:30:02 am
content: Hello everyonewhat are the most used methods to measure the high frequency in an electronic circuit ?

author: bob91343
author_rank: Super Contributor
timestamp: March 08, 2021, 03:13:02 am
content: It depends. You need to be more specific. Is it the frequency of a steady signal you want to know? Perhaps you want to measure the voltage. Is the signal modulated?

author: tautech
author_rank: Super Contributor
timestamp: March 08, 2021, 06:30:21 am
content: The frequency counter on a DSO.If it can be triggered on regardless if the frequency is above rated BW and much reduced amplitude a scopes counter will give a you good idea but of course within the bounds of the scopes frequency accuracy however if it's way up there keep an eye out for aliasing.

author: harrysmith
author_rank: Contributor
timestamp: March 08, 2021, 10:42:30 am
content: Quote from: bob91343 on March 08, 2021, 03:13:02 amI want to measure the tension which the essential relation between the high frequency and the tension ?

author: TheUnnamedNewbie
author_rank: Super Contributor
timestamp: March 08, 2021, 01:20:43 pm
content: I'm going to go on a limb and assume that you actually mean the voltage?There are circuits which relate voltage to frequency, but the exact relationship depends on the specific circuit.

author: joeqsmith
author_rank: Super Contributor
timestamp: March 08, 2021, 01:45:00 pm
content: I assume tension also means voltage. Maybe something here would be of use:https://www.eevblog.com/forum/rf-microwave/measuring-frequency/msg3431804/#msg3431804

author: TimFox
author_rank: Super Contributor
timestamp: March 08, 2021, 04:43:57 pm
content: Translation is treason, as the saying goes in Italian ("traduttore, traditore"). I believe he wants to measure voltage as a function of frequency in a certain range.

author: radiolistener
author_rank: Super Contributor
timestamp: March 08, 2021, 05:15:06 pm
content: Quote from: harrysmith on March 08, 2021, 01:30:02 amThere are two methods to measure frequency:1) measure cycle count for a fixed time interval2) measure cycle period and then calculate frequency = 1 / periodIf you want to measure hundreds MHz or GHz level cycle count, you're needs to use very fast counters, usual counter architecture have pretty low frequency limits, to bypass such limitation you can use pipelined synchronous counter architecture.If you want to measure picoseconds level period, you can do it with Time to Digital Converter (TDC) architecture.For example, you can use FPGA to combine several thousands D-flip-flop cells in a tapped delay line (TDL).Since each cell has some propagation delay τ, you can freeze wave propagation image with a stop pulse applied to all cells. Signal delay deviation between different cells can be calibrated with a signal sources with known period.By the way, if someone knows the best way on how to convert TDL code into usual binary code, please let me know.

author: carvalhoatx
author_rank: Newbie
timestamp: March 14, 2021, 07:56:13 am
content: Hello All,Anyone here who has experience with RF (GHz frequencies) measurement with power sensor?If so, could I post here one question?Thanks,