John, For the OP1 filter, drop the high frequency marker to 2600 Hz and center between the 2 markers. Remember that what is important is for the low frequency "corner" (-3 dB point) of the passband be placed quite near 300 Hz. That is also important for the more narrow SSB filters as well.
For CW, you are doing it correctly - EXCEPT - if you try to center a wide filter (say the FL1 filter is either the default 1.50 or 1.20 width), centering it will cause a response on the opposite sideband. Move that filter higher so you can see a drop down to the noise level on the low frequency slope - that will likely place the low frequency "corner" at about 200 Hz. Refer to the K2 Dial Calibration article on my website www.w3fpr.com for more information. 73, Don W3FPR On 10/10/2010 11:01 PM, [email protected] wrote: > Hi Group, > > K2 #6998 is alive and listening on 40m. > > I'm no expert in all this, so I have a basic question about using Spectrogram > for BFO alignment. > > I've been using Spectrogram to align BFOs/filters for CW and SSB, having read > some tutorials about how to do this. On CW, I'm adjusting the BFO settings so > that my sidetone frequency lies in the centre of the bandpass of each filter. > For SSB, I'm adjusting the BFO settings so that the bandpass of the filter > lies centred between the upper and lower frequency cut-off marker lines for > the filter: for example- for a 2.4khz filter width, centering the bandpass > between 300 and 2700hz. I hope that understanding is correct. > ______________________________________________________________ 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
