I'm sure it's not just me. I know some tuners like SG's can take 20+ seconds to autotune a frequency. So when responding to a CQ waiting for the tuner to do it's thing can make your transmit message loss more likely. My LG is typically 5 seconds or less. I was noticing the system retuning frequently on new QSOs and this solves it.
And yes...I am trying to avoid the 500hz swing that occurs frequently from QSO to QSO or, in a rare circumstance within a QSO (like somebody responding 1499 when you CQ on 1500). 10Hz swings are much better and don't require retuning. If ignoring the last digits is what ALL rigs do I guess I don't see the harm in 1Hz steps if somebody wants to pick that....but 10Hz is satisfactory. I'm only doing digital right now (hearing problems) so I set up my upper bandwidth limit to 2kHz + 200Hz to fit the JT65 signal. Was a bit surprised to see the rolloff occurring...thought it should've been pretty flat up to 2200 but apparently not so I bumped it up to 2400 to fit the 1999Hz audio that can occur now. RRR Mike W9MDB On Sun, Jan 3, 2016 at 1:58 PM, Bill Somerville <[email protected]> wrote: > On 03/01/2016 19:28, Michael Black wrote: > > At least for my autotuner and rig (Omni TenTec VII and SG-237 the 10Hz > > works quite well...the 100Hz still causes some retuning on a few bands. > > Hi Mike, > > I am still struggling with this. If you shift your DF by 1Hz from 1500 > to 1499 then the Tx VFO is moved down by 500Hz but if you move your Tx > DF by 500Hz from 1500 to 1000 the Tx VFO still has to move 500Hz no > matter what "split resolution" you use. Are you saying that you want to > do smaller Tx VFO adjustments to avoid 500Hz steps when you only move > the Tx DF by small amounts? > > I can see the potential gain of limiting the upper audio frequencies if > your rig rolls off as low as 2200Hz but that seems a problem with the > rig. SSB phone would not be very good with such a restricted bandwidth. > Normally the Tx filter is reasonably flat between ~100Hz to 2800Hz i.e. > a 2700Hz wide filter. If yours is rolling off as low as 2200Hz I would > suggest the transmit carrier point is incorrectly aligned. I would check > your Tx signal for suppressed carrier leakage! > > On the rig resolution situation, AFAIK they all truncate, in fact it is > the CAT sender that usually truncates because the CAT frequency commands > lack the lower digits. There are exceptions like the Elecraft K2 which > ignores the last digit I believe. > > 73 > Bill > G4WJS. > > > ------------------------------------------------------------------------------ > _______________________________________________ > wsjt-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/wsjt-devel >
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