Wes, The 1.01 is what the reading indicated. It could easily be higher. Even if it were 1.1:1 it is significantly different that the 2.0:1 reading of eh P3TXMON.
Thanks and 73, Bob Nobis - N7RJN [email protected] > On Sep 8, 2015, at 15:05, Wes (N7WS) <[email protected]> wrote: > > I can't speak to the P3TXMON accuracy. I don't think it's specified anywhere, > however, I don't own one and just skimmed the documentation. > > That said, you should be worrying about your "calibrated" VSWR tester. It's > lying to you. You would pay big bucks to get a precision termination > guaranteed to 1.01 (46 dB return loss). > > To have a power dummy load that good would be astounding. > > On 9/8/2015 10:49 AM, Robert Nobis wrote: >> I am having a VSWR measurement accuracy issue with my P3TXMON. I have a >> calibrated VSWR tester that indicates my antenna and feedline VSWR is >> 1.05:1. When I connect the P3TXMON and transmit, the PS display shows my >> VSWR is 2.0:1 into my feedline and antenna. >> >> I also tried testing into a dummy load. The VSWR tester shows a VSWR into >> the dummy load of 1.01:1, whereas the P3TXMON shows a VSWR of 1.29:1. >> >> Power level readings on the P3TXMON are within 5% of measured power levels >> using a power meter, so the P3TXMON is reasonably accurate measuring the >> transmitted power. >> >> In reviewing the P3 manual, I do not see any methodology for calibrating the >> VSWR measurement accuracy for the P3TXMON. >> >> Any suggestions on how to calibrate the P3TXMON for better measurement >> accuracy? >> >> Thanks and 73, >> >> Bob Nobis - N7RJN >> [email protected] >> >> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
