Difference between pulse powermeter and CW powermeter

I want to design a powermeter for measuring pulse signal.
But I have no references on it.
Please give me the diagram of powermeter or recommend some papers to me.

And please explain the difference between pulse powermeter and constantwave powermeter.

If constant wave signal is measured by pulse powermeter,what does the result go?
If pulse signal is measured by constantwave powermeter,what does the result go?

Can you give me the diagram of powermeter?

Thanks.

CW measurements are long term averages. For constant amplitude signals the peak and average are the same. Pulse measurements give the power during the pulse. This can be peak during the pulse or average during the pulse. If you put a pulse signal to an average reading meter you will get a very low reading of approximately the duty factor multiplied by the power during the pulse.

To make a pulse meter, you need a fast reacting instrument with a peak hold or a sampling and calculating circuits.

Are You sure?
For my knoledge, the 2 main difficulty are:
1) accuracy
2) drift
Think that the most famous factory as Agilent, Rhode&Schwarz, Gigatronic etc give no more than 3% accuracy.
I've seen the schematic of a hp438A and the most critical circuits and mechanics are needed to get both 1/f and thermoelectric voltage as low as possible.

But to answer to your question, A peak meter may read CW also.
basically it's a diode detector with a calibrate response law.
The response time depend on the "integration time costant" (R*C) that follow the detector.
As R*C increase, the meter tend to be a CW. As R*C decrease the meter tend to be noisy.