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Calibrable el cheapo sig gens

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coromonadalix:
hi

is there some cheap signal generators who's their calibrations procedures are known in the wild ...

I know  we have Siglents Rigols Fluke Waveteks, Uni-t  and  others..   and can be sent to cal labs


But i 'm more curious about the low end ones,  Juntek, Feeltech,  the ones based on fpga / r2r  technology

mostly to calibrate their main osc / time base frequency if it is possible


If you have some in minds   do tell   i'm all ears 

thks

Aldo22:
What exactly is the purpose?
I have the super cheap FY3224s and the frequency can't get any more accurate than it is with this device.
The amplitude settings are somewhat inaccurate.
In the attached screenshot 500.000Hz.

nctnico:
Calibration is not about precission, it is about determining whether the device is still within specifications (tolerance limits). Having the calibration done by a certified lab, gives you a traceable calibration and thus some assurance that the measurements made using the device really are within tolerance limits.

Things get hairy though when a device isn't within specs (=failed calibration) as this means that every measurement done between previous (good) calibration and the current (failed) calibration is suspect and needs to be re-done using a device which is within specs.

I'm not sure whether it is worthwhile to send a $50 generator to a cal lab. The price for the calibration will likely be a multiple of the price of the generator itself.

coromonadalix:
The purposes is :   avoid sending or try sending  theses cheapos  to cal lab

And be extorted 160$ CAD for theses non calibrable Juntek jds2900  we have bought,  we bought them  just to help do things fast, under no certifications, field tests  under no precision / certifications

But we have intestinal fights,   where i say:  do not send theses !%%   and they insist to make them certified, certified in what ???


Now we have bought  few Rigols and lots of Siglent stuff,  3x  sdg 1000x,   3x ssg3000x,    scopes, spectrums,  etc ....  now more than enough to have certifiable equipment, and references ... if needed,  They don't go in the fields.

But the fight over theses 100$  "things"     ....  that's why i want to know cheap models who can be corrected in some ways if they are out of specs

I know not to expect miracles out of theses things,  mostly checkups (This is easy  loll, and happy with this)

thks

Aldo22:
I've had my FY3224s for 16 months now and the accuracy is better than the precision.
I mean, I can adjust it in 10mHz steps, but it is accurate to 1mHz (says the oscilloscope).
What do you want to calibrate here, what accuracy do you need?
It's $50. if one day it's not accurate enough, I'll order a new one, because all the other options are probably more expensive.
I'm not worried about that.

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