05-12-2022, 12:22 PM
Peter,
Following the appearance of your tip, I set Fake It on and found that the rig (both 7300 and 7400) did not ALWAYS return to the likes of 50.313 after the TX period. The wide graphs would show the sigs moved too. Probably 90-95% it was OK but it was the odd time when I wasn't looking at the digital display or the WSJTX freq that it seemed to occur (maybe I should just keep a better eye out ??)
I will try the actual Rig Split option shortly (Icoms, so should be supported ok) and see what it does with that option set, but in the meantime have set it back to None. The best option then (none) is to always set the TX freq above 1500Hz to minimise harmonics in the audio passband. { Post note : actually make that 1KHz, as the predominant harmonic is 3rd, and then those occur at 3KHz or higher.)
Another comment : it is amazing to see people txing down near 200Hz where the receiver IF dropoff is happening even on Wide USB filter settings (even with Fake It set, the receiver still has bandwith limitations). Not sure how well the USBD mode handles such frequencies though..
Doug
Following the appearance of your tip, I set Fake It on and found that the rig (both 7300 and 7400) did not ALWAYS return to the likes of 50.313 after the TX period. The wide graphs would show the sigs moved too. Probably 90-95% it was OK but it was the odd time when I wasn't looking at the digital display or the WSJTX freq that it seemed to occur (maybe I should just keep a better eye out ??)
I will try the actual Rig Split option shortly (Icoms, so should be supported ok) and see what it does with that option set, but in the meantime have set it back to None. The best option then (none) is to always set the TX freq above 1500Hz to minimise harmonics in the audio passband. { Post note : actually make that 1KHz, as the predominant harmonic is 3rd, and then those occur at 3KHz or higher.)
Another comment : it is amazing to see people txing down near 200Hz where the receiver IF dropoff is happening even on Wide USB filter settings (even with Fake It set, the receiver still has bandwith limitations). Not sure how well the USBD mode handles such frequencies though..
Doug
Doug VK4ADC @ QG62LG51
http://www.vk4adc.com
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http://www.vk4adc.com
This Forum is only going to be as interesting as the posts it contains.
If you have a comment or question, post it as it may trigger or answer the query in someone else's mind.