I think Richard does understand that, and is asking for a tighter audio frequency control window to maintain his tested & expected power output.

The weird thing here is how he sees such differrence over a 500Hz audio range.

I would be connecting a calibrated constant level audio generator feed and rechecking power difference on the same audio frequency range.

It seems to me that the audio level is changing where his problem lies, rather than the passband window which should be wide open 1900 -19999 as Richard tested.


73


vk4tux

On 7/7/24 03:32, Reino Talarmo via wsjt-devel wrote:

>This does make me wonder though, why only jump in 0.5KHz increments? Not that the logic is difficult but wouldn't it be simpler to just allow a "sweet spot" setting and use that to offset the TX frequency?

Richard, you may have not fully understood the Split operation. Your actual RF transmit frequency does not change at all. Yes, you see how the VFO i.e. rig’s transmit frequency is jumping. What you don’t see is that the audio frequency is changed the same amount into opposite direction.

73, Reino OH3mA



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