1. Does my thru-line wattmeter indicate RMS or P-P power?
Typically RMS, but there is a time constant involved in the meter
movement, and some versions are/can be peak reading. Keep in mind that
most wattmeters, thru-line included, don't actually measure power but
voltage induced in a directional coupler, and are only at their rated
accuracy when they are terminated in the load for which thy are
designed, usually 50 ohms non-reactive.
2. Are TX/Amp power output specs given in RMS or P-P?
Usually RMS, but might be peak envelope power (PEP). CW ratings are
usually RMS; SSB ratings are usually PEP.
The KPA100, for example, is rated at 100 watts output power into a
50-ohm non-reactive load. If you are in CW, this is the carrier (RMS)
power. If you are in SSB, this is the PEP rating.
Enjoy!
Lyle KK7P
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
