The AD9833 has a VOUT Maximum of 0.65V and a VOUT Minimum of 38mV.
So, that's the peak input voltage.
Regarding the peak output voltage, here are the specifications for a branded budget 5MHz arbitrary function generator -
2mVpp~10Vpp (50?, ?10MHz)
4mVpp~20Vpp (high impedance, ?10MHz)
So, maybe something along these lines (Vpp and maximum frequency) looks sensible for my purpose, which is to have a signal generator to experiment with op amps (which I'm now actually doing), filters, etc ?
I'll not be putting the signal down long cables.
I understand that I'm going to have to put in more volts in if I want more volts out.
Thanks