Hi Jim and all, Not sure what you mean but could the following be your problem?
Say you set the K2 to USB and configure FL4 centered on 1000 Hz when you are configuring the filter. Then when your VFO is set to a center frequency of 7070.5 (as seen on the LCD), your PSK signal will be seen at 7071.5. That is because with USB the signal is transmitted on the upper sideband which is set for an offset of 1000 Hz higher than the center frequency. With USB the center frequency is not transmitted. I run into the same problem testing PSKMail in the USA, which hopefully can become an alternative for Pactor III. Some one sets up a server on 40 meters and gives the frequency so others can try to connect. The standard is to specify the frequency of the upper sideband. But many hams don't know the difference and just give the frequency shown on their radio's LCD, and no one can connect because the server is initially not transmitting and you can't see a signal on the waterfall. If you don't know the offset of the filter on the guy's radio, even though you know the center frequency, you don't know the exact frequency of the server (which is on the upper sideband). I hope I didn't confuse everyone on the list. Its easier if you drawing it on a piece of paper. Or specify the frequency shown on the waterfall as this takes into account the audio offset. I have run the same test with someone running a PSKMail server. When they transmit for a second, and I see a signal about 1000 Hz higher in frequency, I know they have specified the wrong frequency. Steve, W2MY -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.16.10/625 - Release Date: 1/13/2007 5:40 PM _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
