Products > Test Equipment
Most accurate signal generator
Fungus:
--- Quote from: nctnico on March 25, 2024, 09:37:03 pm ---The UNI-T UTG932E will also work and is generally available from local distributors which helps with warranty issues (or returning it if it turns out to be no good).
--- End quote ---
I got mine on Amazon.
--- Quote from: nctnico on March 25, 2024, 09:37:03 pm ---I have no hands-on experience with the UNI-T UTG932E
--- End quote ---
It works well enough. A lot of EEVBLOG owners have one.
loop123:
i only need sine wave at 1.8V. Arent there cheap modules where it just produces constant 1.8V sine wave? How to build one if none offered. Also why is it hard to make accurate sine wave generators. Dont you just need a crystal for clock. Is it not a crystal is very accurate like used in processor. Its not like you have to synchronize it with the frequency of pulsar star. Are you saying crystals used in clocks in processor or adc are dirty or not pure so the output from mechanical oscillators are not unform??
Fungus:
--- Quote from: loop123 on March 26, 2024, 01:16:20 am ---i only need sine wave at 1.8V. Arent there cheap modules where it just produces constant 1.8V sine wave? How to build one if none offered.
--- End quote ---
Get something with more than 1.8V, put a potentiometer across the output so you can dial a voltage, and look at it on an oscilloscope?
Bud:
--- Quote from: loop123 on March 26, 2024, 01:16:20 am ---Also why is it hard to make accurate sine wave generators. Dont you just need a crystal for clock. Is it not a crystal is very accurate like used in processor.
--- End quote ---
Processors do not give shit about clock accuracy.
--- Quote --- Its not like you have to synchronize it with the frequency of pulsar star.
--- End quote ---
With your requirements it seems this is what you have to do, i.e. use a GPS disciplinned oscillator, or a rubidium oscillator. Do your research how to build them or how much a commercially built one may cost.
--- Quote --- Are you saying crystals used in clocks in processor or adc are dirty or not pure so the output from mechanical oscillators are not unform??
--- End quote ---
Crystals have large (compare to your requirements) temperature, tolerance and aging drift. To satisfy your requirements you need a different frequency reference 1000 times better. Crystals will change frequency when you look wrong at them.
loop123:
--- Quote from: Bud on March 26, 2024, 04:50:43 am ---
--- Quote from: loop123 on March 26, 2024, 01:16:20 am ---Also why is it hard to make accurate sine wave generators. Dont you just need a crystal for clock. Is it not a crystal is very accurate like used in processor.
--- End quote ---
Processors do not give shit about clock accuracy.
--- Quote --- Its not like you have to synchronize it with the frequency of pulsar star.
--- End quote ---
With your requirements it seems this is what you have to do, i.e. use a GPS disciplinned oscillator, or a rubidium oscillator. Do your research how to build them or how much a commercially built one may cost.
--- Quote --- Are you saying crystals used in clocks in processor or adc are dirty or not pure so the output from mechanical oscillators are not unform??
--- End quote ---
Crystals have large (compare to your requirements) temperature, tolerance and aging drift. To satisfy your requirements you need a different frequency reference 1000 times better. Crystals will change frequency when you look wrong at them.
--- End quote ---
You mean its difficult even to produce accurate 1.8V sine wave? Is the voltage or sine wave more difficult to make or which one is more affected by a crystal/clock? usually what are the errors in crystal just to have an idea? but then if crystals vary how do wifi or cell phone even connect?
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