SOP on MS and EME over 30 years ago.
On 7/5/2017 5:54 PM, Jim Brown wrote:
...
There's another powerful way to prevent overload of your RX by your neighbor
-- out here in W6, neighbors try to TX on the same cycle as our neighbors.
73, Jim K9YC
___
On 7/5/2017 12:23 AM, Richard Lamont wrote:
Thank you for your rigorous, quantified mathematical proof.
Good engineering is not about math proofs, it's about big picture
analysis of entire systems, understanding the limitations of each
element, and concentrating on those elements that optimiz
On 05/07/17 01:33, Jim Brown wrote:
> Richard -- I'm a Fellow of the Audio Engineering Society, BSEE, retired,
> worked in both audio and broadcasting. I'm VERY aware of distortion
> products and the mechanisms that produce them. I also TAUGHT this stuff.
> Your concerns are overblown.
Thank you
I fully agree with Jim, K9YC on the point of distortion. In fact there
are two signal paths in which distortion will affect ones results.
Certainly audio distortion on the TX side will affect the quality of
ones transmitted signal and distortion on the receive will affect ones
decode qualit
* On 2017 04 Jul 19:03 -0500, Christopher Hoover wrote:
> I use fake it mode for split on my K3S, data mode, 4.00 on bandwidth, 1.5
> for shift.Works great.
>
> The rig control for WSJT-X split is not reliable for me.I build from
> tip of tree from the repo with either hamlib-3.1 or hamli
On 7/4/2017 3:43 PM, Richard Lamont wrote:
That's receive levels. I was talking about Tx distortion.
The distortion I measured was for TX mode -- sound interface to radio.
Richard -- I'm a Fellow of the Audio Engineering Society, BSEE, retired,
worked in both audio and broadcasting. I'm VERY
I use fake it mode for split on my K3S, data mode, 4.00 on bandwidth, 1.5
for shift.Works great.
The rig control for WSJT-X split is not reliable for me.I build from
tip of tree from the repo with either hamlib-3.1 or hamlib git, so it is
certainly possible I am seeing a regression that i
On 04/07/17 22:56, Jim Brown wrote:
> Richard,
>
> Not nonsense at all. WSJT-X is VERY robust in the ability to reject
> this sort of QRM. The screen grab below is a great example. I continue
> to be amazed by the decoding in WSJT-X. About 10 days ago, W0OGH
> accidentally got out of sync with J
Richard,
Not nonsense at all. WSJT-X is VERY robust in the ability to reject
this sort of QRM. The screen grab below is a great example. I continue
to be amazed by the decoding in WSJT-X. About 10 days ago, W0OGH
accidentally got out of sync with JA7QVI, calling on his TX cycle, and
on the
On 04/07/17 19:38, Bob McGraw K4TAX wrote:
> One anomaly which I've just observed with my K3S. I did set the
> software as suggested for SPLIT mode for WSJT-X / JT-65. The radio
> followed as expected. I made a few contacts successfully with this
> configuration. When I closed WSJT-X I note
Actually, my experience is different. If I transmit at the edges of the
bandpass, my signal is attenuated due to the bandpass of the output stage.
I hope I am saying this correctly. This is why I use split to ensure that
the signal I transmit engages the full power of the KX3.
Now, I have read m
On 04/07/17 18:37, Jim Brown wrote:
> The split mode in WSJT-X is simply a crutch for those who don't know (or
> don't care) how to set audio levels so that distortion is not produced
> in the audio chain.
Sorry, but that's nonsense.
With a strong signal, just 1% distortion will produce audio har
Thanks Joe. Mike, W9MDB, sent me a procedure using WSJTX to determine the
cutoff points. I arrived at exactly what you are saying. I am using 1500
and find that I can copy JT9 out to 3000 and if a stronger signal out to
about 3300.
73,
Tom - KQ5S
On Tue, Jul 4, 2017 at 7:25 AM, Joe Subich,
I am using a width of 4 khz and using the radio in split mode.
Width of 4 KHz is useless with a 2800 Hz SSB filter. You do not
need (and can't use) more than 3000 - 3300 Hz.
The default shift of 1500 (for DATA A) will provide relatively
flat audio response from 300 Hz to 2800 Hz with Width at
One anomaly which I've just observed with my K3S. I did set the
software as suggested for SPLIT mode for WSJT-X / JT-65. The radio
followed as expected. I made a few contacts successfully with this
configuration. When I closed WSJT-X I noted it left the radio in SPLIT
mode. I can just
No argument but some folks, particularly those new to WSJTX, read the WSJTX
user manual and follow it. Also split mode is "encouraged" on the WSJT
group.
Split Operation: Significant advantages result from using Split mode
(separate VFOs for Rx and Tx) if your radio supports it. If it does not,
W
I agree. I use WSJT-X mostly on 6M during the summer and 160M during the
winter. On 6M, I can't use the WSJT-X split mode, because it takes over
my second VFO, preventing me from working back and forth from WSJT-X on
one VFO (and RX) and CW on the low end of the band.
The split mode in WSJT-X
From the WSJTX users manual:
Split Operation: Significant advantages result from using Split mode
(separate VFOs for Rx and Tx) if your radio supports it. If it does not,
WSJT-X can emulate such behavior. Either method will result in a cleaner
transmitted signal, by keeping the Tx audio always in
Since I am being dragged, kicking and screaming, into these imaginary QSO modes
and have yet to allow my computer to talk to anyone else's computer on the air,
perhaps I shouldn't comment, but I will anyway :-) I am receiving BTW, using
WSJT-X in JT65. Depending on the tone(s), if the K3 is in
Wow the message only took 24 hours to post.
I am no expert but from what I have read it is best to select split
operations in the WSJTX settings. By doing this you can work JT9 and JT65
at the same time since WSJTX will change the split frequency to insure you
are within the passband.
I keep my
Why split? The K3S should be in Data A mode and should switch to Data
when you allow WSJT-X to connect. Typical bandwidth for receive is 2.4
kHz to 2.7 kHz.If you switch to JT-9 via the software then the radio
should move up band 2 kHz.
This is all configured in the Settings F2 menu of
Hope this is not a dupe. I sent it over an hour ago and nothing showed up.
I am trying to tweak my WSJTX setup. What is the recommended shift for the
K3S while running WSJTX? I have the 2.8 khz SSB filter installed. I am
using a width of 4 khz and using the radio in split mode.
73,
Tom - KQ5
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