[AMPS] Re:

[Tom Rauch]

From:           	"Phil Clements" <philk5pc@tyler.net>
To:             	<User312627@aol.com>, <W8JI@contesting.com>, <amps@contesting.com>
Subject:        	Re: [AMPS] Re: 
Date sent:      	Tue, 27 Jul 1999 00:38:01 -0500

> >"Q What is peak envelope power?
> >
> >A - Peak envelope power (PEP) is the average power supplied to the
> >antenna transmission line by a transmitter during one RF cycle at the
> >crest of the modulation envelope, taken under normal operating
> >conditions.
> >
Phil wrote:
> 
> I have always interpreted this to mean that one RF cycle is the MINIMUM
> time for the measurement. Any shorter look would not define where the
> crest of the modulation envelope is.

You probably take it that way mostly because your reading skills 
are good and you understand waveshape and power.

You don't see the FCC lugging scopes around, because they are 
poor devices for this application. Most have problems with this 
application.

For example, the HP 1137A HV probe has a frequency response 
limit of 1 MHz. The bandwidth spec is the point where response to 
a sinewave drops more than 3 dB. 



73, Tom W8JI
w8ji@contesting.com

--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm