Products > Test Equipment
Help to choose an economic Function Generator with two to three decimal places
(1/2) > >>
kavehm:
I need an economic function generator with an accuracy of two to three decimal places and frequency stability and no frequency change up to the range of 2MHz.
In the videos I saw on YouTube, the function generators does not have a fixed output and the frequency is constantly changing.
Those who have experience working with the function generator, I would be grateful if they could guide me.

Thanks,
nctnico:
Search the forum for Feeltech and Uni-t function generators. These will very likely fit your needs. The videos you've seen are likely showing older function generators which are RC oscillator based and those drift all over the place. Not worth buying nowadays.
kavehm:
Thanks for your reply,
I saw many reviews of different function generators. But none of them had a stable output when connected to an oscilloscope. For example, in a review of the Uni-T model UTG962e, when set to 5Hz, the output displayed by the oscilloscope was between 4.95Hz and 5.03Hz. In none of the models that I saw, they did not have a completely accurate output even at low frequencies.
Do all the low-priced models have approximate output and only the expensive models like Keysight have fully accurate output?
I need a model that can have accurate and stable output up to two to three decimal places. For example, when I set the output to 4500.25 Hz, the exact output is this frequency.
Someone:

--- Quote from: kavehm on February 15, 2023, 07:55:07 am ---For example, in a review of the Uni-T model UTG962e, when set to 5Hz, the output displayed by the oscilloscope was between 4.95Hz and 5.03Hz.
--- End quote ---
What was the specification for the frequency measurement? or the noise in that? UNI-T specify:

--- Quote from: UNI-T UTG900E Datasheet ---Frequency,
Accuracy: 1 year ±100ppb
--- End quote ---
I'd trust the manufacturer specification over some quick measurement.
Anthocyanina:

--- Quote from: kavehm on February 15, 2023, 07:55:07 am ---Thanks for your reply,
I saw many reviews of different function generators. But none of them had a stable output when connected to an oscilloscope. For example, in a review of the Uni-T model UTG962e, when set to 5Hz, the output displayed by the oscilloscope was between 4.95Hz and 5.03Hz. In none of the models that I saw, they did not have a completely accurate output even at low frequencies.
Do all the low-priced models have approximate output and only the expensive models like Keysight have fully accurate output?
I need a model that can have accurate and stable output up to two to three decimal places. For example, when I set the output to 4500.25 Hz, the exact output is this frequency.

--- End quote ---

The specification of the UTG932e/962e claims +/-50ppm frequency accuracy, so for your 4500.25Hz example, it could be(within 90 days) between 4500.475Hz and 4500.025Hz.

What you saw on that review is likely the oscilloscope counter having trouble with such low frequencies, and not necessarily the generator itself.
I don't have the uni-t generator, but with the generators i have, i see the last digit flip depending on the oscilloscope i use to measure them.

What is your application that needs such frequency accuracy and precision? could you share the video review of the generator you saw?
Navigation
Message Index
Next page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod