High power Vrms measure

Hi

I would like to measure Vrms of high power pure sinus

power from 1 Vp-p up to 60 Vp-p frequency from 8-15 Mhz signal pure sinus

found this from analog device AD8363: 50 Hz to 6 GHz 50 dB TruPwr™ Detector http://www.analog.com/en/rfif-components/detectors/ad8363/products/product.html

it is dedicated for small device input AC output Vrms DC the output can be scale to 0-5 volts DC so hope it will be suitable for Arduino ADC

but don't know what to do with the high power input? any suggestion how to decrease power? other solutions?

thanks

but don't know what to do with the high power input? any suggestion how to decrease power? other solutions?

You simply need to attenuate the higher voltage source before wiring it into that device and then scale appropriately in your software to correct for the attenuation factor. Simple two resistor voltage divider should work fine.

Lefty

8-15 Mhz

Think it can't be done with Arduino which is only 16Mhz itself. You have to look at processors in the 100Mhz range or more or better dedicated HW.

robtillaart:

8-15 Mhz

Think it can't be done with Arduino which is only 16Mhz itself. You have to look at processors in the 100Mhz range or more or better dedicated HW.

I don't think you looked closely at the chip he is considering. It is rated for the frequency he needs and the chip outputs a DC measurement voltage that is proportional to the AC rms value of the input signal to the chip. The Arduino can interface with that chip easily using a analog input pin.

Does simple resistores devider will do the trick? (which type to buy?) In those high freq is it going to behave normal? Or it will change the shape of the input sinus signal? Does normal resistores will handle 60 v p-p? Which values to use?

Thanks

doing some reading
simple resistors will not work

is there any probe like but in simple PCB
100X, up to 100MHZ and up to 1KV probe like PCB

thanks