[Elecraft] JT modes alignment

[F5LCI]

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 <w3fpr at embarqmail.com> 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



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