[hpsdr] protocol 2 for Hermes

[Helmut]

Hi,

I agree with Marvin that no hardware modification seems necessary. Running here Hermes from a 13.8V DC source, all onboard voltage regulators work fine and sufficiently 'cool'.
RX and Tx functions seem ok after a quick test, but obviously DUP RX is still cancelled due to the lack of room in the FPGA. In my eyes DUP for real-time monitoring of the TX spectrum is indispensable. I repeat my suggestion to use the feedback RX of Pure Signal for this purpose.

Thanks guys in advance.

73, Helmut, DC6NY


-----Ursprüngliche Nachricht-----
Von: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von John Marvin
Gesendet: Donnerstag, 27. April 2017 06:51
An: hpsdr at lists.openhpsdr.org
Betreff: Re: [hpsdr] protocol 2 for Hermes

***** High Performance Software Defined Radio Discussion List *****

Note that as far as the power supply issue is concerned regarding the 
original Hermes, I don't think there is any hardware change that needs 
to be made to the board itself. It's a matter of setting the right 
jumpers and providing an external supply capable of delivering both a 
regulated 12V supply and a regulated 5V supply. The details regarding 
this can be found in the Hermes manual.  So no SMD soldering is 
required, but some external hardware changes will need to be made, the 
difficulty of which will depend on your current power supply and the 
case you are currently using.

It does sound like owners of original Hermes boards would need to do 
some soldering to replace the resettable fuses. I'd certainly like more 
details regarding that, since my primary transceiver is based on a TAPR 
produced Hermes board and I would like to be able to run multiple 
receiver slices at maximum sample rates, which would require the use of 
1Gbit networking.

Regards,

John
AC0ZG

On 4/26/2017 10:03 PM, Joe Martin wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Glen,
>
> I apologize that I do not know definitive answers to your questions.  When I asked Phil this morning if I could assist in getting the Protocol 2 Hermes code out because of his restricted time available to work on the Hermes Protocol 2 code due to work and personal commitments, he passed the information to me and I simply passed it along without knowing much more about the specific details.
>
> Today I added the new features to the Hermes code that now exist in the code for the Angelia and Orion platforms and checked that the result runs on my standalone Hermes, which it does.  My hope is that this initial Protocol 2 firmware will be useful to some.
>
> Phil or others familiar with the Hermes issues specifically can perhaps answer the questions you ask.  Frankly, I don’t have much experience with the Hermes platform.  For this firmware development I used my early-version Hermes standalone board and have not made voltage measurements on my particular board.
>
> I was simply trusting that getting this code operational and available was at least a reasonable start toward getting things operational for Hermes users.  Actual users of the Hermes platform can hopefully explore the power issues and educate us more fully than my limited understanding currently allows.
>
> 73, Joe K5SO
>
>> On Apr 26, 2017, at 9:37 PM, K4KV <k4kv at k4kv.com> wrote:
>>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Joe,
>>
>> Thanks for the work!
>>
>> This begs the question for those of us who hand-built our Hermes:
>>
>> 1.  what are good part numbers for the resettable fuses that SHOULD be on the boards?
>>
>> 2.  How can we know if our on-board power supply is suffering for high current draw?
>>
>> 3.  What kind of power supply do I need, now, to run gigabit? (should I be worried about PS noise?)
>>
>>
>> I, personally, run a small fan over the board because I was not happy with the temperature of the FPGA
>>
>> and ADC chips.
>>
>> 73
>>
>> Glen K4KV
>>
>>
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