Re: Would a cheap frequency generator work well?

The unit that you bought is specifically for testing electronics and the safety spec's may be questionable for that reason.

That aside, the frequency may be reasonably accurate but I am not so sure about the positive offset.

When all buttons are out, it is probably no waveform.

You might try a volt meter, release all output knobs and set the baseline voltage to 0.25 volts ( if it will work that way), then turn on the square wave. Otherwise, you will probably need an O'scope to set it.

Let us know how it goes.