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Struggling with diversity mod

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Udo Langenohl - DK5YA

Struggling with diversity mod

Gents,
with the last firmware release I'm struggling with diversity mode. I was
running diversity for a very long time without any issues on my Xpol EME
system (144 MHz). The main RX is fed with the H-Pol signal from my
transverter #1 via KXV3-A, the sub RX is fed with the Vpol signal from
transverter #2 at AUX input. Both transvertes are in exactly phase by a
common GPS controlled LO. In diversity mode the signals were stereo at
line out, with Hpol on left and Vpol at the right channel. It was
exactly the same on my headphones.

With the latest firmware release there's no stereo signal at line out
anymore and I recognize that strange "hum hum hum" phase shifting on my
headphones. On line out there seems to be either a mono signal mixing
both channels to one or just the main RX on both left and right. I can
see this clearly on my WSJT system, when Hpol and Vpol signals are
eaxctly the same now. There's no difference anymore, even that there
must be some.

When diversity is off and main RX and sub RX are exactly on the same QRG
things are like they were before: main RX on the left and sub RX on the
right channel on both line out and headphones.

Anything worng with the latest firmware release, is this a new feature,
a bug or is it me doing something wrong?

Have no idea.
73 Udo, DK5YA
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Udo Langenohl - DK5YA

Re: Struggling with diversity mod

Sorry, forgot to mention: it's a K3 (serial 59xx) issue here.

Am 11.08.2015 um 13:01 schrieb Udo Langenohl - DK5YA:

> Gents,
> with the last firmware release I'm struggling with diversity mode. I was
> running diversity for a very long time without any issues on my Xpol EME
> system (144 MHz). The main RX is fed with the H-Pol signal from my
> transverter #1 via KXV3-A, the sub RX is fed with the Vpol signal from
> transverter #2 at AUX input. Both transvertes are in exactly phase by a
> common GPS controlled LO. In diversity mode the signals were stereo at
> line out, with Hpol on left and Vpol at the right channel. It was
> exactly the same on my headphones.
>
> With the latest firmware release there's no stereo signal at line out
> anymore and I recognize that strange "hum hum hum" phase shifting on my
> headphones. On line out there seems to be either a mono signal mixing
> both channels to one or just the main RX on both left and right. I can
> see this clearly on my WSJT system, when Hpol and Vpol signals are
> eaxctly the same now. There's no difference anymore, even that there
> must be some.
>
> When diversity is off and main RX and sub RX are exactly on the same QRG
> things are like they were before: main RX on the left and sub RX on the
> right channel on both line out and headphones.
>
> Anything worng with the latest firmware release, is this a new feature,
> a bug or is it me doing something wrong?
>
> Have no idea.
> 73 Udo, DK5YA

--
******************************************
Webs by DK5YA: *
http://www.mmmonvhf.de/ [editor]*
http://www.vhfdx.de/ [owner] *
http://www.palekastro.de/ [owner] *
http://www.solweb.de/ [owner] *
http://www.spessartwetter.de/ [owner] *
******************************************

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Udo Langenohl - DK5YA

Re: Struggling with diversity mod

Brian,

it is MCU 5.29 from June 16. 2015. I didn't try the latest beta yet.
Before I roll back to a former FW I'd like to share my thoughts and
experiences cause its perhaps me doing something wrong.

73 Udo, DK5YA

Am 11.08.2015 um 13:34 schrieb brian:

> Hi Udo,
>
> Very nice setup.
>
> You don't say what firmware you are using.
> Can you revert back to an earlier version?
> If earlier firmware version works then you can blame the new firmware.
>
> 73 de Brian/K3KO
>
>
> On 8/11/2015 11:11 AM, Udo Langenohl - DK5YA wrote:
>> Sorry, forgot to mention: it's a K3 (serial 59xx) issue here.
>>
>> Am 11.08.2015 um 13:01 schrieb Udo Langenohl - DK5YA:
>>> Gents,
>>> with the last firmware release I'm struggling with diversity mode. I was
>>> running diversity for a very long time without any issues on my Xpol EME
>>> system (144 MHz). The main RX is fed with the H-Pol signal from my
>>> transverter #1 via KXV3-A, the sub RX is fed with the Vpol signal from
>>> transverter #2 at AUX input. Both transvertes are in exactly phase by a
>>> common GPS controlled LO. In diversity mode the signals were stereo at
>>> line out, with Hpol on left and Vpol at the right channel. It was
>>> exactly the same on my headphones.
>>>
>>> With the latest firmware release there's no stereo signal at line out
>>> anymore and I recognize that strange "hum hum hum" phase shifting on my
>>> headphones. On line out there seems to be either a mono signal mixing
>>> both channels to one or just the main RX on both left and right. I can
>>> see this clearly on my WSJT system, when Hpol and Vpol signals are
>>> eaxctly the same now. There's no difference anymore, even that there
>>> must be some.
>>>
>>> When diversity is off and main RX and sub RX are exactly on the same QRG
>>> things are like they were before: main RX on the left and sub RX on the
>>> right channel on both line out and headphones.
>>>
>>> Anything worng with the latest firmware release, is this a new feature,
>>> a bug or is it me doing something wrong?
>>>
>>> Have no idea.
>>> 73 Udo, DK5YA
>>
>
>

Petr, OK1RP/M0SIS

Re: Struggling with diversity mod

Udo,

the last release where it worked well for you was 5.14?

73 - Petr, OK1RP

73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt

Guy Olinger K2AV

Re: Struggling with diversity mod

Make sure that you have correctly set the RX states controlled with RX ANT
and ANT.

Sometimes when you upgrade firmware, things like which antenna you were
listening on get lost.

73, Guy K2AV.

On Tue, Aug 11, 2015 at 10:21 AM, ok1rp <[hidden email]> wrote:

> Udo,
>
> the last release where it worked well for you was 5.14?
>
> 73 - Petr, OK1RP
>
>
>
>
> -----
> http://ok1rp.blogspot.com
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Udo Langenohl - DK5YA

Re: Struggling with diversity mod

In reply to this post by Udo Langenohl - DK5YA

Problem solved. Internal antenna routing messed up completely after
upgrading to the latest firmware. I've reloaded an old configuration
saved with a very old firmware (from May 2013) after the upgrade. That
was a bad idea.
Call me SRU... (stupid radio user) :-) ... my fault.

Thanks to all that replied.

73 Udo, DK5YA

Am 11.08.2015 um 13:11 schrieb Udo Langenohl - DK5YA:

> Sorry, forgot to mention: it's a K3 (serial 59xx) issue here.
>
> Am 11.08.2015 um 13:01 schrieb Udo Langenohl - DK5YA:
>> Gents,
>> with the last firmware release I'm struggling with diversity mode. I was
>> running diversity for a very long time without any issues on my Xpol EME
>> system (144 MHz). The main RX is fed with the H-Pol signal from my
>> transverter #1 via KXV3-A, the sub RX is fed with the Vpol signal from
>> transverter #2 at AUX input. Both transvertes are in exactly phase by a
>> common GPS controlled LO. In diversity mode the signals were stereo at
>> line out, with Hpol on left and Vpol at the right channel. It was
>> exactly the same on my headphones.
>>
>> With the latest firmware release there's no stereo signal at line out
>> anymore and I recognize that strange "hum hum hum" phase shifting on my
>> headphones. On line out there seems to be either a mono signal mixing
>> both channels to one or just the main RX on both left and right. I can
>> see this clearly on my WSJT system, when Hpol and Vpol signals are
>> eaxctly the same now. There's no difference anymore, even that there
>> must be some.
>>
>> When diversity is off and main RX and sub RX are exactly on the same QRG
>> things are like they were before: main RX on the left and sub RX on the
>> right channel on both line out and headphones.
>>
>> Anything worng with the latest firmware release, is this a new feature,
>> a bug or is it me doing something wrong?
>>
>> Have no idea.
>> 73 Udo, DK5YA
>

Petr, OK1RP/M0SIS

Re: Struggling with diversity mod

Udo,

happy to hear that it was not the real problem just bad config.

Not SRU my friend as we can draw a lesson from that issue... "check the config after the sw update first".

Many thanks for sharing it.

73 - Petr, OK1RP

73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt