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Exclusive 2.5GHz Frequency Counter

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davicente

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2.5 ghz frequency counter

I supose you can only measure frequency in continious wave signals. can you also measure pulse radiofrequency signals up to 1 GHZ?

thanks

DAVID
 

jimjim2k

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lmx2322

Hi

I am sorry but I think the site now seems to be time-outed in connection.

Does anybody could upload files in the forum?


tnx
 

DrShoe

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lmx2322 prescaler

It looks good. A kit available for €59. Anyone buyed already? Why is the prescaler LMX2322 nowhere to find? even at National Semiconductor not found.
 

Oussov

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exclusive 2.5ghz frequency counter

I appreciate the site author's projects very much. Regarding freq counter - elegant idea, but could not find any data on LMX2322. Also there is no source file for the processor, only hex.

What intrigues me a lot is PLL's charge pump CPo connected to the discrete RC0 PIC input. I cannot think of anything which could make this schematic to work :(

I would rather connect the divider output (FoLD) to the PIC's counter instead.

Also using PIC16F870 looks like overkill for this task.
 

RFzap

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ghz frequency counter

fcnewpcb.jpg


Let me give some technical info about this counter.

The Counter actually use the pre-scaler inside the LMX2322.
The output is the CPo, even if it sounds odd.
The LMX2322 used in this counstruction is a 3 to 5V type.

The advantage to use this LMX is becasue it has a wide input range with excellent sensitivity.
More info here:
https://hem.passagen.se/communication/fcntlcd.html

Parts can be found here:
https://www.rfcandy.com/
 

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