[hpsdr] Fwd: Re: kind of Hermes back to open source version

[Marc Lalonde]

  Hi Arseniy

Thank i keep it in my note  ,for first version will try to keep current 
ADC /DAC and Codec
reason was quite simple i lac the VHDL/Verilog  Skill for try to redo 
FPGA code Myself
so before go this way will wait to have first version out
and see if it have interest on software guy side for that version and 
for got step ahead

this will also permit to check Board Performance whit new supply design 
before next version

but a ADS42LB69 chip may really nice  and even a 300MSP  for 144 band ;-)
for have work in the past whit AD9628 the bus interface was DDR that 
great and dual ADC Chip  hat simplify clock chain
and seem that ADS42LB69 / AD9467 share this feature to ..

Best 73!


On 06/05/2014 12:24 PM, Arseniy Terekhov wrote:
> Hi Marc, thank you, is great initiative!
> What do you think about upgrading to a more modern ADCs, such as 250 
> MHz 16-bit, like this:
> 1. Texas Instruments ADS42LB69: 2 ch. 250 MHz 16 bit
> 2. Analog Devices AD9467: 1 ch. 250 MHz 16 bit (Using in flex 6500/6700)
> 3. Intersil ISLA216P25: 1 ch. 250 MHz 16 bit (available pcb and scheme 
> from http://www.ohwr.org/projects/fmc-adc-250m-16b-4cha/wiki/Wiki)
>
> Some of these ADCs have pin to pin compatible with a lower ADC 
> sampling frequency, that will allow at one PCB install expensive ADC 
> 250 MHz and cheaper 125 MHz.
>
> Best Regards,
> Arseniy Terekhov.
>
>
> 2014-05-06 18:20 GMT+04:00 Marc Lalonde <mlalonde at alphatronique.com 
> <mailto:mlalonde at alphatronique.com>>:
>
>     ***** High Performance Software Defined Radio Discussion List *****
>
>     Hi All
>
>     i planing to make new version of hermes and relase it under open
>     source license
>     that include Schematic ,PCB and Gerber
>
>     that not intended to be a copy of the current design but improved
>      version whit many change
>     and naturally put it back on open source community  ,and of course
>     fit my own radio need ;-)
>
>     for now that list of change ..
>
>     Hermes "Phenix"
>
>     1-) swap FPGA for BGA and bigger Version for better routing of
>     high speed signal
>     2-) add another LPC2208 ADC  (still to determined for that
>     revision what to avoid to play to much on FPGA )
>     3-) redo power supply section and power distribution  use OKI
>     DC-DC +  local TI Hight PRSS LDO
>     4-) rempace 10mhz OSC circuit by Copermicus GPS module  or
>     FGPMMOPA6H  + MNEA  and 1PPS to FPGA for time
>     5-) add bufferised 122.88Mhz clock for DEMI xverter  LO
>     6-) isolate some input / output ( probably all)
>     7-) metal can for RF analog section  , one for TX one for RX
>     8-) ADC in LVDS or cmos soft selectable ,LVDS = less noise since
>     balenced and matche lenght
>     9-) redo micrel PHY section from scratch whit newer PHY chip and
>     bigger Volt isolation Jack
>     10-) bufered 10MHZ ouptut for Kuhne Xverter or sililar use
>     11-) swap 0805 part for 0603  and QFN for some IC (DAC better
>     routing )
>     12-) max 6 layer board  100% hand routed
>     13-) may remove the audio section for simplify not yet sure for
>     this one ..
>
>     for now 40% of schematic was done  and planing to complete it in
>     next 10 day
>     take bit long since i work whit PDF Hermes schematic and i find
>     many error on it to ..
>
>     next week-end will try to find place were put file
>
>     bit about myself ,Marc Lalonde  VE2-OLM  was hamradio since 1992
>     whit advence license ,
>     was Senior IPC Certified PCB Designer whit > 20 year experience in
>     high speed circuit
>     i own and operate Alphatronique Inc.  that a Design house whit in
>     house SMT Automated Assembly line
>     for last 10 year most of my job was as subcontractor
>      Design/Assembly for GE Smart Grid
>     have absolutely no interest to start a radio company since my
>     current position was FUN ,RELAX , and LUCRATIVE
>     so what to keep it as is
>
>     so if some one have suggestion of feature to implement it time
>      before i close shematic
>
>     Best 73!
>
>     VE2OLM
>
>
>
>
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