UmTRXv2 final project

Alexander Chemeris alexander.chemeris at gmail.com
Mon Jul 30 12:31:17 UTC 2012


Andrey, thanks.
Please send me UmTRXv2_sch_all.pdf as well

On Mon, Jul 30, 2012 at 4:22 PM, Andrey Sviyazov <andreysviyaz at gmail.com> wrote:
> Here project, sch and pcb files.
>
> Best regards,
> Andrey Sviyazov.
>
>
>
> 2012/7/30 Andrey Sviyazov <andreysviyaz at gmail.com>
>>
>> Hi Jean-Samuel.
>>
>> Here are attached last versions of interactive PDF for assembly and
>> schema, and BOM (rename zi_ to zip first).
>> List of components which are changed:
>> L6-1, L6-2 = R0603 0 Ohm instead of choke
>> C45-1, C45-2 = Do Not Install
>> C82-1, C82-2, C98-1, C98-2 = 100pF instead of 470pF
>> C83-1, C83-2, C99-1, C99-2 = 1500pF instead of 8.2nF
>> C84-1, C84-2, C97-1, C97-2 = 33pF instead of 150pF
>> R106-1, R106-2, R121-1, R121-2 = 2k2 instead of 820 Ohm
>> R109-1, R109-2, R119-1, R119-2 = 3k3 instead of 1.2 kOhm
>>
>> Best regards,
>> Andrey Sviyazov.
>>
>>
>>
>> 2012/7/25 Andrey Sviyazov <andreysviyaz at gmail.com>
>>>
>>> Hi Jean-Samuel.
>>>
>>> First of all you're right, we can't delay production.
>>> So, I am sure it is better if PCB production will continue as you
>>> suggest.
>>>
>>> There are only three hardware issues which have to be solved before
>>> assembling:
>>> 1) Improving LMS phase noise.
>>> It is almost done and Alexander wrote you which component need to order.
>>>
>>> 2) Digital noise which born in GPS module 230.
>>> In ver.2 we will use GPS module 570, but I am afraid that we can get the
>>> same problems.
>>> So, I need 1-2 days to workaround this issue.
>>> And also we have to understand either it important or it doesn't because
>>> this noises  hided under modulation.
>>>
>>> 3) LMS engineers suggested us to use PLL loop filter 100kHz instead
>>> 50kHz.
>>> In case of 100kHz we have to decrease charge-pump current from 1.2-1.9mA
>>> down to 0.4mA, but I am afraid about integral phase noise of LO because
>>> (possible)  it can affect modulation phase error (in degrees).
>>> I think, required 1-2 days (the same days) to understand this also.
>>>
>>> So, at Thirsday I will send you final BOM and assembly files.
>>> Hope it doesn't delay production, otherwise tell me and we'll hurry up.
>>>
>>> Best regards,
>>> Andrey Sviyazov.
>>>
>>>
>>>
>>> 2012/7/24 Alexander Chemeris <alexander.chemeris at gmail.com>
>>>>
>>>> Hi Jean-Samuel,
>>>>
>>>> We're sitting together with Andrey Sviyazov now and he says that it's
>>>> fine to continue with this PCB.
>>>>
>>>> You will need 40pcs of this 0 Ohm jumpers (2pcs per board):
>>>>
>>>> http://fr.farnell.com/bourns/cr0603-j-000elf/resistor-0603-0r-5-0-1w/dp/2008343
>>>>
>>>> Andrey will update the schematics and BoM later today.
>>>>
>>>> On Tue, Jul 24, 2012 at 2:13 PM, Jean-Samuel Najnudel - BJT PARTNERS
>>>> SARL <jsn at bjtpartners.com> wrote:
>>>> > Hi Andrey,
>>>> >
>>>> > PCB copper is ready yet. We will lose 560 Euros and 3 weeks delay if
>>>> > we
>>>> > change the copper. It is not impossible, we can decide to do that but
>>>> > I
>>>> > would suggest we change the PCB for the next batch. After testing the
>>>> > v2
>>>> > board, you may found more changes we need on the copper.
>>>> >
>>>> > The board itself is not ready. We can change some passives. This will
>>>> > not
>>>> > cost anything (or almost) and extra delay will be just one or two days
>>>> > at
>>>> > most.
>>>> >
>>>> > Please let me know what you want to do about the PCB.
>>>> >
>>>> > Please let me know the exact passives modifications. I will purchase
>>>> > the
>>>> > components asap and send the modifications list to the fab.
>>>> >
>>>> > Best regards.
>>>> >
>>>> > Jean-Samuel.
>>>> > :-)
>>>> >
>>>> > Le 23 juil. 2012 22:47, "Andrey Sviyazov" <andreysviyaz at gmail.com> a
>>>> > écrit :
>>>> >
>>>> >> Hi Jean-Samuel.
>>>> >>
>>>> >> Please let me know fabrication progress, a specially PCB.
>>>> >> I ask you because of few changes required to improve LMS phase
>>>> >> noises.
>>>> >> BOM required changes in passive components only.
>>>> >> If PCB doesn't yet ordered, then possible I'll make changes too.
>>>> >>
>>>> >> Best regards,
>>>> >> Andrey Sviyazov.
>>>> >> (Sent from my mobile client)
>>>> >>
>>>> >> 04.07.2012 20:01 пользователь "Jean-Samuel Najnudel - BJT PARTNERS
>>>> >> SARL"
>>>> >> <jsn at bjtpartners.com> написал:
>>>> >>>
>>>> >>> Hi Andrey,
>>>> >>>
>>>> >>> Thank you very much for your help.
>>>> >>>
>>>> >>> I will forward this to the fab.
>>>> >>> Yes, you are all right, the FBMH2012HM121-T price is much better
>>>> >>> than the
>>>> >>> MLB-201209-0120PU. However, availability on Farnell France is not as
>>>> >>> good as
>>>> >>> the MLB-201209-0120PU. Price difference is quite big but we only use
>>>> >>> 5 beads
>>>> >>> per boards. Difference makes only about 1 euro per board. I will let
>>>> >>> the fab
>>>> >>> decide between these 2 references.
>>>> >>>
>>>> >>> Best regards.
>>>> >>>
>>>> >>> Jean-Samuel.
>>>> >>> :-)
>>>> >>>
>>>> >>>
>>>> >>> On Wed, Jul 4, 2012 at 4:30 PM, Andrey Sviyazov
>>>> >>> <andreysviyaz at gmail.com>
>>>> >>> wrote:
>>>> >>>>
>>>> >>>> Hi Jean-Samuel.
>>>> >>>>
>>>> >>>> Yes, you are all right and you can order TDK - MPZ1608S601A instead
>>>> >>>> of
>>>> >>>> MLB-160808-0600PL.
>>>> >>>> And also possible to use 3 times cheaper FBMH2012HM121-T, 0805,
>>>> >>>> 2.5A
>>>> >>>> instead of MLB-201209-0120PU.
>>>> >>>>
>>>> >>>> Best regards,
>>>> >>>> Andrey Sviyazov.
>>>> >>>>
>>>> >>>>
>>>> >>>>
>>>> >>>> 2012/7/4 Jean-Samuel Najnudel - BJT PARTNERS SARL
>>>> >>>> <jsn at bjtpartners.com>
>>>> >>>>>
>>>> >>>>> Hi Andrey,
>>>> >>>>>
>>>> >>>>> Thank you very much for your reply.
>>>> >>>>> Now, I better understand.
>>>> >>>>>
>>>> >>>>> You are all right. I do not have anything as high current as
>>>> >>>>> MLB-201209-0120PU at a lower price.
>>>> >>>>>
>>>> >>>>> However, I have a 0603 600 ohm 1A bead, as MLB-160808-0600PL, at a
>>>> >>>>> much
>>>> >>>>> lower price.
>>>> >>>>>
>>>> >>>>>
>>>> >>>>> http://ru.farnell.com/tdk/mpz1608s601a/ferrite-bead-0603-600-ohm/dp/1669747RL
>>>> >>>>> What do you think about this component (TDK MPZ1608S601A)?
>>>> >>>>>
>>>> >>>>> Best regards.
>>>> >>>>>
>>>> >>>>> Jean-Samuel.
>>>> >>>>> :-)
>>>> >>>>>
>>>> >>>>>
>>>> >>>>>
>>>> >>>>> On Wed, Jul 4, 2012 at 3:22 PM, Andrey Sviyazov
>>>> >>>>> <andreysviyaz at gmail.com> wrote:
>>>> >>>>>>
>>>> >>>>>> Hi Jean-Samuel.
>>>> >>>>>>
>>>> >>>>>> If Farnell better for you, then please order exactly
>>>> >>>>>> MLB-201209-0120PU
>>>> >>>>>> and  MLB-160808-0600PL.
>>>> >>>>>> They are HI_CURRENT beads and it is really required.
>>>> >>>>>>
>>>> >>>>>> Please find attached here new SCH and BOM files with new part
>>>> >>>>>> numbers
>>>> >>>>>> and links.
>>>> >>>>>>
>>>> >>>>>> Best regards,
>>>> >>>>>> Andrey Sviyazov.
>>>> >>>>>>
>>>> >>>>>>
>>>> >>>>>>
>>>> >>>>>> 2012/7/4 Jean-Samuel Najnudel - BJT PARTNERS SARL
>>>> >>>>>> <jsn at bjtpartners.com>
>>>> >>>>>>>
>>>> >>>>>>> Hi Andrey,
>>>> >>>>>>>
>>>> >>>>>>> Thank you very much for your reply.
>>>> >>>>>>>
>>>> >>>>>>> Could you please confirm the components bellow are fine ?
>>>> >>>>>>>
>>>> >>>>>>>
>>>> >>>>>>> http://fr.farnell.com/murata/blm18tg601tn1d/ferrite-600ohm/dp/1115050RL
>>>> >>>>>>>
>>>> >>>>>>>
>>>> >>>>>>> http://fr.farnell.com/tdk/mmz2012121b/perle-de-ferrite-0805-120-ohm/dp/1669728RL
>>>> >>>>>>>
>>>> >>>>>>> Please let me know if this is fine.
>>>> >>>>>>> If not, which would you suggest ?
>>>> >>>>>>> http://ru.farnell.com/ferrite-beads
>>>> >>>>>>>
>>>> >>>>>>>
>>>> >>>>>>> Thanks a lot for your help.
>>>> >>>>>>>
>>>> >>>>>>> Best regards.
>>>> >>>>>>>
>>>> >>>>>>> Jean-Samuel.
>>>> >>>>>>> :-)
>>>> >>>>>>>
>>>> >>>>>>>
>>>> >>>>>>> On Wed, Jul 4, 2012 at 2:02 PM, Andrey Sviyazov
>>>> >>>>>>> <andreysviyaz at gmail.com> wrote:
>>>> >>>>>>>>
>>>> >>>>>>>> Hi Jean-Samuel.
>>>> >>>>>>>>
>>>> >>>>>>>> For the TI160808U601 and TI201209U121 you can use any high
>>>> >>>>>>>> current
>>>> >>>>>>>> ferrite chip bead with 600 Ohm and 120 Ohm impedance
>>>> >>>>>>>> respectively.
>>>> >>>>>>>> For example you could order similar partnumbers from the ELFA
>>>> >>>>>>>> catalogue in the 0603 and 0805 SMD cases respectively,
>>>> >>>>>>>> datasheet here pdf.
>>>> >>>>>>>>
>>>> >>>>>>>> Best regards,
>>>> >>>>>>>> Andrey Sviyazov.
>>>> >>>>>>>>
>>>> >>>>>>>>
>>>> >>>>>>>>
>>>> >>>>>>>> 2012/7/4 Jean-Samuel Najnudel - BJT PARTNERS SARL
>>>> >>>>>>>> <jsn at bjtpartners.com>
>>>> >>>>>>>>>
>>>> >>>>>>>>> Hi Andrey,
>>>> >>>>>>>>>
>>>> >>>>>>>>> Thank you very much for your reply.
>>>> >>>>>>>>>
>>>> >>>>>>>>> I try to find where to buy the TI160808U601 and TI201209-121
>>>> >>>>>>>>> chokes. I do not know where I should find these. Would you
>>>> >>>>>>>>> know where I
>>>> >>>>>>>>> should order these components ?
>>>> >>>>>>>>>
>>>> >>>>>>>>> By the way, do you confirm the ISSI SRAM is pin compatible
>>>> >>>>>>>>> with the
>>>> >>>>>>>>> Cypress chip ?
>>>> >>>>>>>>>
>>>> >>>>>>>>>
>>>> >>>>>>>>> http://www.digikey.com/product-detail/en/IS61NLP51236-200TQLI/706-1103-ND/1557418
>>>> >>>>>>>>>
>>>> >>>>>>>>> Is this ISSI chip fine for our application ? Is 18 MBit enough
>>>> >>>>>>>>> ?
>>>> >>>>>>>>> Do you confirm this ISSI chip is the best value for what we
>>>> >>>>>>>>> need ?
>>>> >>>>>>>>> Are you sure we cannot find a lower cost chip with similar
>>>> >>>>>>>>> performances
>>>> >>>>>>>>> and/or a better performances chip with similar cost ?
>>>> >>>>>>>>> Are you sure we will not need to reroute the PCB ?
>>>> >>>>>>>>>
>>>> >>>>>>>>> We really need to be sure before starting the PCB production.
>>>> >>>>>>>>> If
>>>> >>>>>>>>> both you and Alexander confirm everything is fine, I will ask
>>>> >>>>>>>>> the fab to
>>>> >>>>>>>>> start the PCB.
>>>> >>>>>>>>>
>>>> >>>>>>>>> Please let me know.
>>>> >>>>>>>>>
>>>> >>>>>>>>> Again, thanks a lot for your help.
>>>> >>>>>>>>>
>>>> >>>>>>>>> Best regards.
>>>> >>>>>>>>>
>>>> >>>>>>>>> Jean-Samuel.
>>>> >>>>>>>>> :-)
>>>> >>>>>>>>>
>>>> >>>>>>>>>
>>>> >>>>>>>>>
>>>> >>>>>>>>> On Tue, Jul 3, 2012 at 11:40 PM, Andrey Sviyazov
>>>> >>>>>>>>> <andreysviyaz at gmail.com> wrote:
>>>> >>>>>>>>>>
>>>> >>>>>>>>>> Jean-Samuel.
>>>> >>>>>>>>>>
>>>> >>>>>>>>>> Please inform me what actually rf chockes partnumbers are
>>>> >>>>>>>>>> problem
>>>> >>>>>>>>>> to order.
>>>> >>>>>>>>>> Unfortunately MuRata produce few billion pcs and then stopped
>>>> >>>>>>>>>> for
>>>> >>>>>>>>>> a few years.
>>>> >>>>>>>>>> So, possible we have to find some Chinese fab partnumbers to
>>>> >>>>>>>>>> order.
>>>> >>>>>>>>>>
>>>> >>>>>>>>>> Best regards,
>>>> >>>>>>>>>> Andrey Sviyazov.
>>>> >>>>>>>>>> (Sent from my mobile client)
>>>> >>>>>>>>>>
>>>> >>>>>>>>>> 04.07.2012 1:22 пользователь "Andrey Sviyazov"
>>>> >>>>>>>>>> <andreysviyaz at gmail.com> написал:
>>>> >>>>>>>>>>
>>>> >>>>>>>>>>> Hi Jean-Samuel.
>>>> >>>>>>>>>>> Unfortunately I have no internet connection now.
>>>> >>>>>>>>>>> Tomorrow I'll check flash and others.
>>>> >>>>>>>>>>>
>>>> >>>>>>>>>>> Best regards,
>>>> >>>>>>>>>>> Andrey Sviyazov.
>>>> >>>>>>>>>>> (Sent from my mobile client)
>>>> >>>>>>>>>>>
>>>> >>>>>>>>>>> 04.07.2012 1:10 пользователь "Alexander Chemeris"
>>>> >>>>>>>>>>> <alexander.chemeris at gmail.com> написал:
>>>> >>>>>>>>>>> >
>>>> >>>>>>>>>>> > On Mon, Jul 2, 2012 at 10:16 PM, Jean-Samuel Najnudel -
>>>> >>>>>>>>>>> > BJT
>>>> >>>>>>>>>>> > PARTNERS
>>>> >>>>>>>>>>> > SARL <jsn at bjtpartners.com> wrote:
>>>> >>>>>>>>>>> > > 1/ Would you know a distributor for the Murata chokes ?
>>>> >>>>>>>>>>> > > The
>>>> >>>>>>>>>>> > > fab them to have
>>>> >>>>>>>>>>> > > some issue to source these.
>>>> >>>>>>>>>>> >
>>>> >>>>>>>>>>> > Andrey is looking into this.
>>>> >>>>>>>>>>> >
>>>> >>>>>>>>>>> > > 2/ Would you suggest a distributor for the GPS chip ?
>>>> >>>>>>>>>>> >
>>>> >>>>>>>>>>> > Try contacting manufacturer directly:
>>>> >>>>>>>>>>> >
>>>> >>>>>>>>>>> >
>>>> >>>>>>>>>>> > http://www.transystem.com.tw/product.php?b=g&m=pe&cid=4&sid=&id=66
>>>> >>>>>>>>>>> >
>>>> >>>>>>>>>>> > They have a distributor in UK, but I think it might be
>>>> >>>>>>>>>>> > easier
>>>> >>>>>>>>>>> > to buy
>>>> >>>>>>>>>>> > from the manufacturer directly:
>>>> >>>>>>>>>>> > http://www.castlemicrowave.com/castle-contact.asp
>>>> >>>>>>>>>>> >
>>>> >>>>>>>>>>> > This chip is popular in Russia, so it is easy to source
>>>> >>>>>>>>>>> > them
>>>> >>>>>>>>>>> > here,
>>>> >>>>>>>>>>> > shipping them to EU might be a pain in big batches, but I
>>>> >>>>>>>>>>> > think
>>>> >>>>>>>>>>> > we
>>>> >>>>>>>>>>> > could send few chips for this prototyping batch if
>>>> >>>>>>>>>>> > manufacturer's lead
>>>> >>>>>>>>>>> > time is too long. Here it costs $14.50/chip for more then
>>>> >>>>>>>>>>> > 16
>>>> >>>>>>>>>>> > chips:
>>>> >>>>>>>>>>> > http://www.compel.ru/infosheet/TSI/EB-570/
>>>> >>>>>>>>>>> >
>>>> >>>>>>>>>>> > --
>>>> >>>>>>>>>>> > Regards,
>>>> >>>>>>>>>>> > Alexander Chemeris.
>>>> >>>>>>>>>>> > CEO, Fairwaves LLC / ООО УмРадио
>>>> >>>>>>>>>>> > http://fairwaves.ru
>>>> >>>>>>>>>
>>>> >>>>>>>>>
>>>> >>>>>>>>
>>>> >>>>>>>
>>>> >>>>>>
>>>> >>>>>
>>>> >>>>
>>>> >>>
>>>> >
>>>>
>>>>
>>>>
>>>> --
>>>> Regards,
>>>> Alexander Chemeris.
>>>> CEO, Fairwaves LLC / ООО УмРадио
>>>> http://fairwaves.ru
>>>
>>>
>>
>



-- 
Regards,
Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио
http://fairwaves.ru



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