Hi Don, and thank you for the fast reply (as usual!) I can use the USB mode, decoding is OK, But the ALC is not optimized for digital modes.
My only problem: "R" and reverse "R" behave equally ; I thought that the tones would be inverted... I seriously wonder : Was I wrong with alignment with the reverse "R" mode only ? I had carefully aligned my filters ...many years ago, before JT65 appeared. So I'll have to RTFM to remind the procedure. Back to the book... 72, Jean-Marc, F5LCI Le Tue, 11 Feb 2014 14:15:27 +0100, Don Wilhelm <[email protected]> a écrit: > Jean-Marc, > > Yes, you will need to align those filters. > I normally set the FL1 position to OP1, FL2 to 1.00, FL3 to 0.70 and FL4 > to 0.40 widths. > Then set the BFOs for FL1 to the same values as the SSB filters - RTTY > corresponds to LSB and RTTY REV corresponds to USB. That filter will be > used for transmit in all cases and works well with a waterfall display > for normal receive. > Set the other filters to center on 1000 Hz. Those can be used if a > strong interfering signal appears inside the passband of the OP1 > filter. Observe the LSB/USB relationship - the DAC numbers (and also > frequency) will be higher for RTTY REV. > > If you have the KDSP2 option, also set those filters 2, 3, and 4 to > center at 1000 Hz to agree with the IF filter centers. > > The use of Spectrogram is recommended when aligning the IF filters. You > can download a copy from my website www.w3fpr.com - look near the bottom > of the home page. Instructions for the use of Spectrogram can be found > in the K2 Dial Calibration article. > > 73, > Don W3FPR -- View this message in context: http://elecraft.365791.n2.nabble.com/JT-modes-alignment-tp7584041p7584044.html Sent from the Elecraft mailing list archive at Nabble.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
