FT8 Split on 60 Meters across channels

  • 2
  • Question
  • Updated 8 months ago
This morning V84SAA was working FT8 on 60 Meters, He was transmitting on 5126 and listening on 5357. I could not figure out how to set up the split.

If I set WSJT-X to 5126 I could decode his signal with no problem. I set up my 6400 to split mode, slice A (RX ) on 5126 and slice B (TX) on 5357, and I tried setting split in WSJT to all three options, none, rig, and fake it.

In no case could I transmit on 5357 and listen on 5126. (WSJT readout indicated 5126)

Should I expect the frequency display in WSJT to change based on whether I'm receiving or transmitting?

I'd appreciate any ideas.
Photo of Geoff - AB6BT

Geoff - AB6BT

  • 152 Posts
  • 34 Reply Likes

Posted 8 months ago

  • 2
Photo of VE6WZ

VE6WZ

  • 23 Posts
  • 9 Reply Likes
I had the same problem. Good decode on V84, but I could not TX. I gave up. I heard the suggestion it might be a TX lockout in the Flex, or WSJTx because in Fox hound it will answer back to V84 automatically on his TX. 5126 is out of band???

Steve Ve6wz
Photo of Geoff - AB6BT

Geoff - AB6BT

  • 152 Posts
  • 34 Reply Likes
I was running in normal node for that very reason. I don't know if 5126 is legal where he is, I know it isn't here. But hey, I was trying to transmit on a legal frequency...

I gave up as well. Too bad as his signal was as strong as -9.

It would be great to get this sorted out. It may be a limitation of WSJT.
Photo of Don, VE2HJ

Don, VE2HJ

  • 38 Posts
  • 2 Reply Likes
Hi Geoff ,
The cause of the radio not transmitting is probably tha fact that your transmit filter is too wide. Try reducing it so it stays inside the channel Bandwidth. I reduce mine at 2800 and transmit Ok.

Hope it help.

de Don...VE2HJ
Photo of Geoff - AB6BT

Geoff - AB6BT

  • 152 Posts
  • 34 Reply Likes
Hi Don

No, the transmit bandwidth is 80-2800.

I can transmit with no problem on 60 Meters FT8 with one slice and not split with two slices.

Have you successfully done such a wide split with two slices on FT8?

73, Geoff
Photo of Don, VE2HJ

Don, VE2HJ

  • 38 Posts
  • 2 Reply Likes
Hi,
I think it is not possible while in F/H operation.
In normal FT8, WSJT-X is transmitting on VFO A so in your CAT setting  i would set VFO A slice to slice B .
Also in WSJT-X i set Split operation to None.

de VE2HJ
Photo of Geoff - AB6BT

Geoff - AB6BT

  • 152 Posts
  • 34 Reply Likes
Hi Don,

I was using FT8 standard mode.

I don't understand what you mean by this " in your CAT setting set VFO A slice to slice B". How do I do that? Sorry, but I'm a bit confused here.

I am testing with serial CAT control so I changed the Com port (com 8 in this case) assignment from slice A to slice B, still no joy.

I'm clearly missing something. It seems that WSJT will only transmit on the frequency shown in the readout in WSJT. 

Geoff

Edit: I'm trying this on 80 Meters so there are no bandwidth restriction just to eliminate that variable.
(Edited)
Photo of Don, VE2HJ

Don, VE2HJ

  • 38 Posts
  • 2 Reply Likes
Hi,

In SmartSDR CAT , I edit my COM port assinged to WSJT-X as this = in the VFO A slice option instead of "A" choose "B" .
 The frequency of slice B should appear in the readout in WSJT.

Don VE2HJ

Photo of Geoff - AB6BT

Geoff - AB6BT

  • 152 Posts
  • 34 Reply Likes
Hi Don,
Yes, that is what I did and that is what I see as well. If I reassign the CAT port to slice B the frequency of slice B does show in the readout. But then I can't receive on the slice A frequency in WSJT-X so I can no longer decode the other station.

Apparently, I'm still missing something fundamental. 

Geoff
Photo of Don, VE2HJ

Don, VE2HJ

  • 38 Posts
  • 2 Reply Likes
Hi Geoff ,
In your receiving slice ( slice A) you have to select the DAX channel that WSJT-X is listenning to.
ex.:
if WSJT-X   ===  Setting Audio Soundcard input = DAX Audio RX 1
Then in Slice A select DAX Channel 1

Or the other way around
If you have selected DAX Channel 1 in your RX slice ; then in wsjt select the DAX Audio RX 1 .  Both must match.

de VE2HJ
Photo of Geoff - AB6BT

Geoff - AB6BT

  • 152 Posts
  • 34 Reply Likes
Hi Don,

Thank you for all your assistance and taking time to help me.

I have it sorted out.

What I was missing is that the WSJT-X frequency readout will show the transmit frequency while the waterfall will be showing the receive frequency.

That was confusing to me as there is no indication in WSJT-X of the receive frequency!

Thank you very much.

73,
Geoff
Photo of Don, VE2HJ

Don, VE2HJ

  • 38 Posts
  • 2 Reply Likes
Hi Geoff,
A picture means a 1000 words so here my setting :