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KX3 & RMS Express - T R latency

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Dave-6

KX3 & RMS Express - T R latency

Howdy,
I'm using an old laptop to connect my KX3 to winlink system. Using the
KXUSB for control, and laptop soundcard jacks to KX3 phones and mic jacks.
Works fine, except that RMS Express gives me a Timeout message for T-R
latency - apparently my T - R switching is too slow? Any suggestions on
what to change to help this out?
Using DATA-A, ALC off
On my old full size rig I used a signalink to interface and I just cranked
the delay knob full CCW which did the trick - since I'm not using the
signalink here I'm at a loss - no easy knob to turn!
Thanks,
Dave
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Barry K3NDM

Re: KX3 & RMS Express - T R latency

Dave,
Interesting problem. I used used RMS Express, but I used a SignaLink
USB for interface and T/R. I had no problems this way. Everything seemed
to work as I would have expected.

73,
Barry
K3NDM

------ Original Message ------
From: "Dave" <[hidden email]>
To: [hidden email]
Sent: 10/29/2016 12:32:52 PM
Subject: [Elecraft] KX3 & RMS Express - T R latency

>Howdy,
>I'm using an old laptop to connect my KX3 to winlink system. Using the
>KXUSB for control, and laptop soundcard jacks to KX3 phones and mic
>jacks.
>Works fine, except that RMS Express gives me a Timeout message for T-R
>latency - apparently my T - R switching is too slow? Any suggestions
>on
>what to change to help this out?
>Using DATA-A, ALC off
>On my old full size rig I used a signalink to interface and I just
>cranked
>the delay knob full CCW which did the trick - since I'm not using the
>signalink here I'm at a loss - no easy knob to turn!
>Thanks,
>Dave
>______________________________________________________________
>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:[hidden email]
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html
>Message delivered to [hidden email]

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ve3ibw

Re: KX3 & RMS Express - T R latency

In reply to this post by Dave-6

Had you considered using the KX3's VOX capability rather than the TX-RX
commands through the USB interface? For all intents and purposes, the
signalink is just a vox-in-a-box. The KX3 has two menu items to tweak vox
operation. I have VOX GN = 015 and VOX INH = 030. You'll have to play
with Mic gain and sound card output to make sure you have no more than four
bars of ALC (with the fifth bar very occasionally flickering). I use this
set-up for my KX3 digital operations and it is very responsive.

From the KX3 programmer's reference, there can be a 100ms lag in
responsiveness to USB serial commands. Also, depending on how much polling
RMS Express is doing against the KX3, this could exacerbate the lag of the
TX-RX commands.

I hope you figure it out. The KX3 is a very awesome rig and produces such
a clean digital signal when set-up correctly.

regards,
Brian
VE3IBW

On Sat, Oct 29, 2016 at 12:32 PM, Dave <[hidden email]> wrote:

> Howdy,
> I'm using an old laptop to connect my KX3 to winlink system. Using the
> KXUSB for control, and laptop soundcard jacks to KX3 phones and mic jacks.
> Works fine, except that RMS Express gives me a Timeout message for T-R
> latency - apparently my T - R switching is too slow? Any suggestions on
> what to change to help this out?
> Using DATA-A, ALC off
> On my old full size rig I used a signalink to interface and I just cranked
> the delay knob full CCW which did the trick - since I'm not using the
> signalink here I'm at a loss - no easy knob to turn!
> Thanks,
> Dave
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

Regards,
Brian
VE3IBW

Dave-6

Re: KX3 & RMS Express - T R latency

Well, 100ms would definitely be too much.
I'll give vox a try - I'm sure that will work after I figure out the
settings. Thanks!
Lack of built in sound card interface is one area I think the kx3 is
deficient - I would for sure have purchased that option if it was given.
Dave

On Oct 29, 2016 2:17 PM, "Brian Waterworth" <[hidden email]>
wrote:

Had you considered using the KX3's VOX capability rather than the TX-RX
commands through the USB interface? For all intents and purposes, the
signalink is just a vox-in-a-box. The KX3 has two menu items to tweak vox
operation. I have VOX GN = 015 and VOX INH = 030. You'll have to play
with Mic gain and sound card output to make sure you have no more than four
bars of ALC (with the fifth bar very occasionally flickering). I use this
set-up for my KX3 digital operations and it is very responsive.

From the KX3 programmer's reference, there can be a 100ms lag in
responsiveness to USB serial commands. Also, depending on how much polling
RMS Express is doing against the KX3, this could exacerbate the lag of the
TX-RX commands.

I hope you figure it out. The KX3 is a very awesome rig and produces such
a clean digital signal when set-up correctly.

regards,
Brian
VE3IBW

On Sat, Oct 29, 2016 at 12:32 PM, Dave <[hidden email]> wrote:

Peter Pauly

Re: KX3 & RMS Express - T R latency

And that they didn't put it in the KX2 either is a major oversight.

On Sat, Oct 29, 2016 at 4:41 PM, Dave <[hidden email]> wrote:

> Well, 100ms would definitely be too much.
> I'll give vox a try - I'm sure that will work after I figure out the
> settings. Thanks!
> Lack of built in sound card interface is one area I think the kx3 is
> deficient - I would for sure have purchased that option if it was given.
> Dave
>
> On Oct 29, 2016 2:17 PM, "Brian Waterworth" <[hidden email]>
> wrote:
>
> Had you considered using the KX3's VOX capability rather than the TX-RX
> commands through the USB interface? For all intents and purposes, the
> signalink is just a vox-in-a-box. The KX3 has two menu items to tweak vox
> operation. I have VOX GN = 015 and VOX INH = 030. You'll have to play
> with Mic gain and sound card output to make sure you have no more than four
> bars of ALC (with the fifth bar very occasionally flickering). I use this
> set-up for my KX3 digital operations and it is very responsive.
>
> From the KX3 programmer's reference, there can be a 100ms lag in
> responsiveness to USB serial commands. Also, depending on how much polling
> RMS Express is doing against the KX3, this could exacerbate the lag of the
> TX-RX commands.
>
> I hope you figure it out. The KX3 is a very awesome rig and produces such
> a clean digital signal when set-up correctly.
>
> regards,
> Brian
> VE3IBW
>
> On Sat, Oct 29, 2016 at 12:32 PM, Dave <[hidden email]> wrote:
>
> > Howdy,
> > I'm using an old laptop to connect my KX3 to winlink system. Using the
> > KXUSB for control, and laptop soundcard jacks to KX3 phones and mic
> jacks.
> > Works fine, except that RMS Express gives me a Timeout message for T-R
> > latency - apparently my T - R switching is too slow? Any suggestions on
> > what to change to help this out?
> > Using DATA-A, ALC off
> > On my old full size rig I used a signalink to interface and I just
> cranked
> > the delay knob full CCW which did the trick - since I'm not using the
> > signalink here I'm at a loss - no easy knob to turn!
> > Thanks,
> > Dave
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to [hidden email]
> >
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

Bill Frantz

Re: KX3 & RMS Express - T R latency

In reply to this post by Dave-6

VOX is easier to adjust for most* digital modes than it is for
voice because the computer is either sending full volume, or not
sending. With voice, the sound level is continuously changing.
Therefore many more settings will work.

73 Bill AE6JV

* I don't know of any digital modes that use sound level changes
to send data. There might be another bit per baud or so
available doing that, but the cost is likely to be a much higher
error rate in non-perfect band conditions.

On 10/29/16 at 1:41 PM, [hidden email] (Dave) wrote:

>I'll give vox a try - I'm sure that will work after I figure out the
>settings. Thanks!

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