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Most accurate signal generator

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loop123:



I have 2 china made signal or function generators that are junk. It can't even tell the amplitude. What is the most accurate signal generator ever but also inexpensive? Range is audio range of 0 to 20000Hz and voltage from 0 to 5V or so. It has to be accurate in 1/100000th or output say 1.00001 V or has frequency accuracy of say 5000.00000 Hz and can output in rms or peak to peak. It has to be stand alone unit because I don't want to buy a $5000 oscilloscope just to use the function generator. What have you encountered or used? Thank you.

Aldo22:
What do you mean by "inexpensive"?
I'm no expert, but I doubt that 10 microvolts of amplitude "accuracy" and "inexpensive" go together.

HalFoster:
First, an $5K oscilloscope built in generator would not even be close.  The frequency accuracy would be met by most any OCXO, and by many of the better ones with a standard oscillator.  The output will be specified in dBm at 50R, not in volts, and would be around -87 dBm for .00001 VRMS.  A very good, affordable choice would be a HP 3335A.

Antonio90:
10uV is inside the noise specs of really good linear PSUs. You cannot measure it with any reasonable certainty using cheap DMMs (ACV).
A Siglent SDG2042X (€475+VAT) will outperform any DSO's integrated AWG, and the specified amplitude accuracy is ±(1%+1mV), so 1V ± 0.02V (at 10KHz, and the uncertainty goes up with frequency). 1.00001V means 0.001% or 10ppm accuracy.
I don't think it's happening anytime soon. Although there might be audio analyzers with signal generators that reach those levels, a general purpose AWG will not. As a matter of fact, the resolution you asked for could not be resolved even with 16 bit ENOB, as that would be 65,536 steps, and around 15uV for a 1V peak to peak signal.

jonpaul:
Audio Precision, GenRad, Prisim, TEK SG505

China junk is not to be trusted for any measurement

j

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