Multiple instance of WSJT-X

[n3...@aol.com]

Create another shortcut on your desk top.

Right click and properties.

Under the "General" tab edit the name of the icon, In this case probably WSJT-X JT65

Under the "Shortcut" tab add this to the target line.

Leave a space after .exe then --rig-name=JT65

Or instead of JT65 type what ever you want to call it. That name will now show up on waterfall window as well as the new main window.

Here is a copy and paste of mine, C:\WSJT\wsjtx\bin\wsjtx.exe --rig-name=TS2000

I haven't had a problem of assigning the same sound card but I get conflicts if the same PTT or CAT port is used. So only let your main instance have all the control on the rig, and the others will be monitor only. 30 meters is the only band I know of where the WSPR and JT65 dial frequencies are close enough to be able to decode both modes at the same time.

You can have multiple instances run multiple radios if you have the resources to do so. I had WSPR and JT65 running on the same radio, also while having WSPR running on a SDR.

Hope this helps.

Chris

[Glenn Elmore]

Chris, 
Thanks. I independently came up with that same solution a couple of hours ago. It all works fine.
BTW the HI beacon has been running continuously for a couple of days now. Plan is to relocate it to wa6m when tower for it is up in a few weeks.

Glenn

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[Glenn Elmore]

Today I tried an experiment, I went mobile on 70cm WSPR. I used the IC706mkIIg that I have in the car along with a rubidium 10 MHz frequency reference and tripler to replace the Icom's 30 MHz master oscillator. I ran WSJT-X on an old laptop.  The antenna I used was a dual-band vertically polarized whip so it was cross polarized to the signals on 432.301500+-.

The picture below shows the waterfall next to a map of the route that the display covers, roughly lined up. The bulk of it is Hwy 12, actually running West to East from bottom to top. I crossed Hwy 101 during the quiet interval after the JT65 transmission.



I started the recording while waiting at the signal at Fulton/Hwy12 shown at the bottom of the picture. I then turned east (up on this map) and accelerated to free-way speeds. You can see the multipath components grow around what is the actual transmit frequency of 1500.  You can also see a "main" path signal about 40 Hz low of this, most obvious at the end of the WSPR interval on the CW signal which is also transmitting at 1500.
40 Hz => .694m*40=27.8 m/s or 62 mph, away from N6GN.

In the next interval you can see KJ6MKI transmitting WSPR. His 1460 signal is showing up only ~10 Hz low because he is to the south, off to the right on the map, and relative velocity is not nearly so high as for the N6GN signal, which has its location marked at the bottom left of the map. Even so, it looks like I might have been going just a little fast, following the traffic speed on Hwy 12.

In the last interval, JT9, you can see a nice ACS term cross the line intersecting N6GN and N6GN/mobile. I didn't look at Planefinder to identify the aircraft responsible.

At the very end, I am moving North and more or less at right angles to N6GN so the path length isn't changing. Here you can see the CW ID at pretty much the correct frequency.

I find it particularly noteworthy that the average multipath signal, the center of the spreading, is on the actual rather than the Doppler shifted "main" signal. This makes sense since only the short path between the mobile antenna and a nearby reflector/scatterer is changing and this may as likely be in front of as behind the mobile. I suppose this fact means that it is possible to reduce the energy associated with multi-path distortion by frequency domain filtering. Maybe this is commonly done on some systems, I don't know.

These are all cross-polarized signals so the sensitivity to multi-path is probably higher than if the mobile had a horizontally polarized antenna. Perhaps I'll try that some time for comparison.

Later I parked and spotted several other stations, though not to the database because I didn't have an Internet connection to the laptop.  I also reversed the situation and transmitted from a parked location. For both of these stationary situations, all frequencies were correct down to the last Hz.

I also notice that in listening to the tones, that the multipath causes so much distortion that it is quite noticeable and would get in the way with QSO. I can't remember ever working anyone on 432 SSB while mobile but I expect that it doesn't sound as good as from fixed stations.

Glenn n6gn

[Line Printer]

I have been using a pair of WSJTX apps for a couple of daze on 70cm, one
running in the WSPR mode and the other in the jt65/jt9 mode.

I spotted many jt65 and jt9 signals from WA6M. ALmost 400 of them......
The environmental condition appeared to be better on Saturday as I watched
WA6M's signals approaching the positive strength measurements and then
match them:

2013 -1 0.1 1600 # WA6M CM88IN
2015 1 -0.9 1600 @ WA6M CM88IN
2023 -1 0.1 1600 # WA6M CM88IN

I tried a few jt65 and jt9 signals (as well as msk144 and qra64
transmissions) but with pskreporter appearing to only show 6m and lower
frequency jt65/jt9 spots, I don't know if any of my signals were decodable
where others are listening.....

For those that are sending transmissions using multiple modes, how are you
automating this? My efforts were manually changing the modes using WSPRx
but I can't be as automated as data processing systems can be. ^-^

73,
Kevin Martinez
KI6STW


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[Glenn Elmore]

Tropo has been better and Hawaii/KH6HME has been in off and on but not terrifically strong the last couple of days. It seems to be breaking up a bit now. We've also seen good conditions along the California coast with WA6M/N3IZN spotting that path on WSPR on 2m. No spots yet of the WA6M 70cm beacon at N3IZN, as far as I know..

The WA6M 70cm beacon is the candidate hardware for KH6HME on Mauna Loa.  I described it in a different thread Here. The U3s can generate several types of beacon/digital formats and I've only turned on WSPR, JT65,JT9 and CW so far.  I don't know what we'll finally end up with.

I don't know a way to make WSJT-X transmit/receive the same way. It does have dual mode JT9+JT65 but adding WSPR requires another instance, as far as I know. Running two instances of WSJT-X, with the "--rig-name=xyz" command line addition, does allow a single radio to provide streams for up to three types of decode or even transmit if the PTT/transmitter control can be handled.

Glenn n6gn

[n3...@aol.com]

Band is in and out.

2016-08-22 02:52	N3IZN	144.490505	-21	0	DM13ji	100	WA6M	CM88in	797	318
2016-08-22 02:52	N3IZN	144.490506	-21	0	DM13ji	100	N6KOG	CM97gs	624	323

Did see N6KOG for a 1/3 of the 3:04 sequence but no decode.

Nothing on 432 as of yet. The SDR with the TCXO still drifts a bit, but should decode.