[hpsdr] 14bit Hermes Schematic?

[Martin Emmerson]

Thanks Helmut,
   For the information!
Yes, I tried V10.3 on my 16bit Hermes and although it worked I still had
the same
problem with PS not always working!
The way I test is, without any PA running, I select "PA-A" then from the
"Linearity" menu
I just press "Two-tone" and when PS is working I get a "Correcting" in
yellow and a
"Feedback" in red appear to the right under the spectrum display.
I just did this test ten times and five time it worked and five it did not
(the yellow correcting
goes out and the red Feedback does not appear)...
I am using the latest Thetis v2.6.8 but I have had the same problem on all
previous versions...
This problem is the same on three different (all home built) boards

If you ever try this test on your 14bit Hermes I would be interested in the
result?
It is a bit like tossing a coin, you can get a run or tries when it always
works but
over a number of tries it always seems to average out to roughly %50 -
strange.
I am now messing about with the Verilog firmware code - certainly learning
something
but not fixed the problem yet..........

73's

Martin G3OQD.


On Wed, 6 Nov 2019 at 11:25, Helmut <dc6ny at gmx.de> wrote:

>
>
>
>
> Hi Martin,
>
>
>
> I’m using Hermes_v10.3 firmware on the Hermes 14bit working sufficiently
> stable under Thetis.
>
>
>
> If I recall correctly  the footprints of the LTC 2208 14bit and 16bit are
> quite identical, but
>
> other I/Os of the FPGA  are used. Though  Hermes 16 Bit firmware should
> fail. BTW my Thetis v2.6.7
>
> is asking for v10.3 or higher if older firmware versions are used.
>
>
>
> 73, DC6NY
>
>
>
> *Von:* Martin Emmerson [mailto:martinhemmerson at gmail.com]
> *Gesendet:* Mittwoch, 6. November 2019 09:05
> *An:* Helmut
> *Cc:* Sebastien F4GRX; hpsdr at lists.openhpsdr.org
> *Betreff:* Re: [hpsdr] 14bit Hermes Schematic?
>
>
>
> Hi Helmut,
>
>    Normally I would agree with you but if you have a new build Hermes
> board which has
>
> inadvertently had the wrong (smaller capacity) FPGA installed it would be
> nice to see
>
> if it can work with the smaller 14bit firmware before going through the
> pain of replacing
>
> the FPGA with the correct one!
>
>
>
> I would still be most interested to know what version of the protocol 2
> firmware you are
>
> running on your 14bit Hermes ?
>
> I have been trying V10.3...
>
>
>
> 73's
>
>
>
> Martin G3OQD.
>
>
>
>
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