Hi Eric Do you have any transmitter IMD numbers yet?
Craig VK3HE --- "Eric Swartz - WA6HHQ, Elecraft" <[EMAIL PROTECTED]> wrote: > Hi Bill, > > The reference on-channel signal for past ARRL BDR > testing has typically > been set between -110 and -80 dBm, well above the > MDS. te interfering > signal generator is increased until this signal > drops by a dB due to > compression. This on frequency signal dominates the > in-band RMS audio > voltage. The noise floor needs to raise a lot before > it dominates that > signal. > > Also, even on the Orion, their BDR is well above > their phase noise at > any spacing. > > For the Orion II, the ARRL numbers are: > > 2kHz 20kHz > Phase Noise -129 -125 > BDR 136 136 > Neither of their BDRs were noise limited. > > For the particular K3 I tested the phase noise on > below, I measured a > typical BDR of 140-141dB at spacings 5 kHz and wider > and about 138dB at > 2 kHz. > > On another note, as I mentioned in my email, the > ARRL has refined a > number of their test methods. They are now making > the dynamic range > measurements by measuring the on frequency IMD spur > or blocked signal > using a narrow band spectrum analyzer. This > separates the blocking or > IMD measurement from reciprocal mixing, which they > will do as an > additional test. See page 71 of the May 2006 QST for > details. > > 73, Eric WA6HHQ > ----- > > Bill Tippett wrote: > > WA6HHQ: > > > > Rig 1kHz 2 10 20 50 100 1M > > K3 -110 -119 -136 -140 -143 -144 -150 > > > > I'm now wondering how you measured 143 dB > BDR at 2 kHz in the > > presence of 119 dB Phase > > Noise? Shouldn't the measurement have been > > "phase noise limited"? > > > > 73, Bill W4ZV > > > _______________________________________________ > 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 > ____________________________________________________________________________________ Be a better Heartthrob. Get better relationship answers from someone who knows. Yahoo! Answers - Check it out. http://answers.yahoo.com/dir/?link=list&sid=396545433 _______________________________________________ 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
