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. Now, my question is this: how is the "bandpass" defined, visually, using the Spectrogram trace on my screen? Is it enough to get the trace symmetrically oriented around the sidetone frequency (CW) or between the upper and lower frequency markers (SSB). Or are there other points of significance on the visual trace that I need to use to ensure correct placement of the BFO offsets. Also, what degree of precision is required? Do I need to get obsessional about this and measure the width of the bandpass , however defined, precisely and then adjust the filter response around the markers using actual measurements. Or is "eyeballing" all that's required here?? I'm not sure how type A I need to be. Thanks for your advice. I also have a question about the AGC, but I'll leave that for another time... 73, John VK7JB ------------------------------------------------------------ This email was sent from Netspace Webmail: http://www.netspace.net.au ______________________________________________________________ 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
