Too bad WSJTx does not have even more tx adjustment steps, say related to whatever the needed tx BW of the mode is - maybe 100HZ for FT8. Then, operators with standard style adjustable tx BW in their rigs could limit their tx to just a bit more than the tx adjustment step to make a maximally-tight BW tx signal.
An example: I run Thetis SDR on an ANAN radio which allow both adjustable tx BW and tx profiles. On FT8, I use a tx profile with the tx BW set for 600Hz - 1050Hz to 1550Hz. According to the tx monitor display, there are some very small FT8 tx sidebands, just visible below -100dB, even without over modulating. The Thetis tx BW filter will cut one side of these to below visibility when my tx center is near one edge of the WSJTx step. With 100Hz adjustment steps, I could cut both sidebands down (to 100Hz +/- a bit) no matter what my tx center frequency was. Though the sidebands are (probably) so low as to be insignificant, it would be nice and might be more valuable in different WSJTx modes. K6AVP - Los Osos, CA USA > On Jun 1, 2022, at 21:19, wsjt-devel-requ...@lists.sourceforge.net wrote: > > From: Black Michael <mdblac...@yahoo.com <mailto:mdblac...@yahoo.com>> > To: WSJT software development <wsjt-devel@lists.sourceforge.net > <mailto:wsjt-devel@lists.sourceforge.net>> > Subject: Re: [wsjt-devel] Hamlib testing > Message-ID: <1207100384.3374203.1654143570...@mail.yahoo.com > <mailto:1207100384.3374203.1654143570...@mail.yahoo.com>> > Content-Type: text/plain; charset=UTF-8 > > It's also to avoid the edges of your bandpass which can affect your > transmitted power. > > Mike W9MDB
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