TX Profile will not tune via ATU

K7FRY

While trying different TX profiles I noticed when the last profile was selected "ProSet HC6 Default" I could not get a success on the ATU. When selecting any other profile was I able to get a successful tune.

Don't know if this is an issue or just me.

73
K7FRY
Steve

Tim - W4TME

Is this still a problem?  No one else commented that they were having issues like this.

K7FRY

Yes it is still happening. I can reproduce it every time. Not a big deal for me as I dont use profiles much.

Ken - NM9P

I'm not sure I understand his question. Is the issue that when changing TX Profiles the ATU goes into "untuned mode" and must be retuned? (A known situation, I believe.) Or that selecting a particular profile "breaks" the ATU so that it doesn't work at all until a different profile is selected?

K7FRY

The latter. When I select the last profile it breaks the ATU. When the last profile is selected a tune fails. I then select another profile and I get a tune success in the same frequency.

Tim - W4TME

Is it always the same profile that the ATU fails on?

K7FRY

Yes, always the same profile. Again these are the profiles that were in the new software. I did not create any new ones or edit them, being that I really don't use them. Just wanted to let you know what I found. I made a video to better explain it.

https://www.youtube.com/watch?v=5LxtpFnYvNk

GI4FZD

I just tried this, I have not got that problem on my 6300
cheers
Paul
GI4FZD

Mark Erbaugh

I'm new to SmartSDR (two weeks), but I tried setting a narrow Tx profile (1300 Hz - 1500 Hz) and the ATU would try but usually fail. I switched to a wider profile and the ATU succeeded. I haven't eliminated all the variables, but it seems the Tx profile width is causing the problem.

Mark Erbaugh

Further testing. I didn't even mess with profiles, just changed the TX filter Low Cut and High Cut. With 1300/1500, no ATU success. With 100/2800, the ATU tuned. This is with an antenna that has a pretty good SWR (<2.0:1) on the band tested.

Ken - NM9P

The ATU Tune function will tune at zero beat frequency on SSB, and at the CW offset frequency on CW.  If your Low/High cut is outside of the CW frequency then the transmitter doesn't have any "audio" power to tune at the frequency.

Sergey R5AU

Hi Ken, this is clear, but I think this is not normal/usual for Ham's, in case you press Tune, means you request tune procedure what is independent from you current state, just compare with Non-SDR TRCVR, and I think this is logical and normal

Mark Erbaugh

Ken,

I sort of thought that that was what was happening. Thanks for the confirmation that there wasn't a problem with my radio.

I agree with Sergey that this is not expected operation. The reason I tried setting the narrow Tx filtering is so that I can see where I will be transmitting so I can move around the pileup and find a clear spot to call when the other station is working split.

I think the solution would be for the radio to go to CW mode to do the tuning then switch back to the current mode.The fact that the radio is tuned a kHz or two away from the desired frequency shouldn't be a problem with normal antennas.