Don, Do you ever sleep? It seems as if every time I post something, no matter what day, no matter what hour, there's a response from you within a few minutes. hihi
Seriously, thanks for your reply. You had me set the RTTY FL1 BFO about a week ago using Spectrogram. At any rate, the problem I'm having happens when doing PSK with mode USB as well with mode RTTY (reverse). Jon KB1QBZ ________________________________ From: Don Wilhelm <[email protected]> To: Jon Perelstein <[email protected]> Cc: elecraft reflector <[email protected]> Sent: Sun, October 10, 2010 8:42:59 PM Subject: Re: [Elecraft] K2: Problems With PSK Jon, How do you have the RTTY FL1 BFOs set? It sounds like you are attempting to use the default settings for the RTTY filter set, and that will not work well. Enter CAL FIL (with the internal probe placed in TP2), and first set RTTY FL1 to the OP1 filter. Then go to SSB and observe the BFO settings (tap BAND-) for both LSB and USB (write them down). Then go back to RTTY mode and set the BFO for RTTY rev to the same value as the USB BFO, and set the RTTY non-rev BFO to the same value as the LSB BFO. That should produce a good signal and a good waterfall display. The FL1 BFOs are used for transmit in all cases, and RTTY will transmit through the filter on the KSB2. FL2 thru FL4 can be set to anything you want because they will only be used during receive. I normally set FL2 to 1.00, FL3 to 0.70 and FL4 to 0.40, then center those filters at 1000 Hz. Attempting to center them higher will cause you to run out of BFO range in RTTY normal. The narrow filters are good for RTTY operation (most others will likely use the full width OP1 filter) - set the Mark frequency in MMTTY (or other RTTY app) to 915 Hz and it will allow you to narrow the filters down so you can avoid QRM (tune with the VFO instead of clicking on the waterfall). If you have questions about using Spectrogram to set your filters, take a look at part 3 of the K2 Dial Calibration article on my website www.w3fpr.com. ______________________________________________________________ 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
