WSJT-X has already been changed where Fox transmits CQ every 5 transmissions
now.If you don't see it then you shouldn't be calling.
>From the git log:
In DXpedition mode, enforce a Fox CQ at least every 5 transmissions.
On Saturday, June 30, 2018, 10:10:09 AM CDT, Charles Suckling
<char...@sucklingfamily.free-online.co.uk> wrote:
Hi Mike
The problem with needing to see a CQ isthat the dxpedition may rarely transmit
a CQ (some folks were reporting thisyesterday). Then, stations were working
them by just calling. Majority were on the correct period, most were above
1000Hz. From what Icould see here about 90% of hounds were calling correctly.
Whether theycould hear the dxpedition is another matter.
Earlier this afternoon there was a run ofCQ from them (or someone pretending to
be them) about 10dB stronger than theyare here most of the time (-18 to -20).
During this spell there seemed tobe no QSOs.
Charlie
From: Black Michael via wsjt-devel[mailto:wsjt-devel@lists.sourceforge.net]
Sent: 30 June 2018 15:15
To: ' WSJT software development '
Cc: Black Michael
Subject: Re: [wsjt-devel]Observation on Expedition Mode
I have some observations too.
#1 Tons of ops calling KH7Z when they can't seethem. I assume this only causes
problems as it's quite possible KH7Z withtheir honker antennas and can see them
but not the other way round. SoKH7Z will put them in the queue and try to
process them taking up the limitedslots they are using right now (2 from what
I've seen). IMHO the solutionto this is pretty simple....when you turn on
Hound or switch bands you shouldbe PREVENTED FROM TRANSMITTING UNTIL YOU GET CQ
FRO THE DXSTATION. So, you would be required to double-click on a CQ toallow
transmitting. I noticed the the Baker team gave a lukewarmendorsement of FT8
on their news update quite likely due to this problem.
#2 We need to turn on spotting for the DX station sothat PSKReporter and
Hamspots can work and also so JTAlert can produce alertswhen the DX station is
received. Don't need to spot the hounds ofcourse. Trying to figure out what
band is good for local ops would bemuch improved with automatic spotting for us
and for the DX team who could thensee where their signal is going as more teams
use internet on site viasatellite links.
de Mike W9MDB
On Saturday, June30, 2018, 8:13:39 AM CDT, Grant Willis <vk...@bigpond.com>
wrote:
Joe,
Anobservation if I may about expedition mode. I see with KH1/KH7Z that the
numberof Fox TX channels varies – I presume as they place more stations in
thequeue. As expected, the power per channel drops the more channels running
sothat the amplifiers can keep up. However, this has an unintended
consequenceperhaps of potentially breaking QSOs. A few times now I have started
callingKH1/KH7Z on 20m when I am receiving them around -09 (but with pretty
lowS-meter signal strength). Usually this is with 1-2 channels running ontheir
downlink. If they go to 3 channels I can still receive but it falls tosay -15.
If they bring up channel 4 and 5 I loose them. There just isn’tthe link budget
left to receive them when the power is split between more than3 channels in
this example.
Nowthe issue is, if they answer me by adding the 4th channel – Iwont hear them
under those conditions. If I am part way through a QSO I canloose the RR73 for
the same reason if they answer someone else on the 4thchannel– simply because
the link runs out of steam.
Nowif I couldn’t hear them in the first place I wouldn’t have triedcalling. In
this case however, they can disappear under load effectively and Iloose them
mid QSO.
Forfuture consideration perhaps is to have the setting of number of channels
vsthe number of active channels maintain a constant PER CHANNEL TX power
ratherthan the variable situation we have now. Ie I enable my fox station to
run say4 channels, but only reply on 1 channel, then the output power should be
theequivalent of the power that would be in that channel if all 4 were in fact
onair but aren’t. At least that way I have a constant link budget I amworking
with on my comms channel with the fox station rather than one that canhave them
drastically cut power mid QSO without reference to the conditions onthe path I
am working them via.
Ifwhat I am describing is not how it is supposed to work already then there
isanother factor at work somewhere in the chain to be explored. I would be
happyto discuss this further and use the KH1/KH7Z expedition to observe and
learnmore about how the multi-channel nature of the mode works.
Regards,
GrantVK5GR
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