Depends on the scope. Calibration is usually performed by an internal square
wave reference that is usually brought out on a terminal on a good quality
scope. This is all that's necessary for relative frequency calibration. There's
usually a (cal) position on the horizontal sweep control and a screwdriver
adjust to get the calbration close. This square wave is also useful for
adjusting the scope probe (capacitance) too.
Rick

"Hulatt, Jon" wrote:

> Hi All,
>
> I've finally bought me a scope. Hasn't arrived yet, but I've read the
> instructions and I'm wondering what can I use for frequency calibration,
> considering that I don't have a calibrated oscillator.
>
> Would 50Hz mains AC be accurate enough for LF calibration? and is there a
> fairly precise higher frequency waveform that I can use in or from something
> else??
>
> thanks
>
> Jon
>
> --

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