UmTRX v1b coming soon

Andrey Sviyazov andreysviyaz at gmail.com
Tue May 29 17:59:35 UTC 2012


Hi all.

First of all, Alexander asked me to use UmTRXv2 instead of v1b, so project
renamed and I'll send whole project later.
Here "What new in UmTRXv2.txt" in addition to fixed of all known UmTRXv1a
issues<http://code.google.com/p/umtrx/issues/list?can=1&q=&colspec=ID+Type+Status+Priority+Milestone+Owner+Summary+Modified&cells=tiles>
.
Unfortunately, a lot physical changes between v1a and v2 and it is very
difficult to me to explain all step-by-step in details.
But I am ready to patiently answer for any kind of questions.
Here also EEpromConfig.SchDoc and BOM files which changed because C298
should be Case-A (issue
18<http://code.google.com/p/umtrx/issues/detail?id=18&can=1&colspec=ID%20Type%20Status%20Priority%20Milestone%20Owner%20Summary%20Modified>
).

Best regards,
Andrey Sviyazov.



2012/5/29 Andrey Sviyazov <andreysviyaz at gmail.com>

> Here PDF's
>
> Best regards,
> Andrey Sviyazov.
>
>
>
> 2012/5/29 Andrey Sviyazov <andreysviyaz at gmail.com>
>
>> Here PCB file of project.
>>
>> Best regards,
>> Andrey Sviyazov.
>>
>>
>>
>> 2012/5/29 Andrey Sviyazov <andreysviyaz at gmail.com>
>>
>>> Hi all.
>>>
>>> First release of UmTRXv1b seems finished.
>>> All suggestions and issues are welcomed, especially prior to production
>>> (few days).
>>> There are 4 Rx inputs to implement either scan function or software
>>> diversity receiving.
>>> There are 16pin connector to supply and control external preselector,
>>> amplifier, LNA, ATT, diversity switch...
>>> This new release have 2U size (100x160mm) that more universal for indoor
>>> housing to put together several UmTRX's with PC and power supply modules in
>>> one rack.
>>> Also possible variant to meet to requirements -40C and it is the only
>>> one reason to keep OCVCXO onboard.
>>> Also possible variant with external control panel to make easily IP65
>>> housing design.
>>> Also DC supply voltage can be in range 8..28V to keep single DC supply
>>> if UmTRX will combined with IP65 tower mounted amplifiers.
>>>
>>> And so on depend of your fantasy :)
>>>
>>> Here included some project files and BOM for variant with 20dBm Tx and
>>> onboard control.
>>> PCB and PDF files will be in the next two e-mails.
>>>
>>> Best regards,
>>> Andrey Sviyazov.
>>>
>>>
>>>
>>> 2012/5/21 Alexander Chemeris <alexander.chemeris at gmail.com>
>>>
>>>> Andrey,
>>>>
>>>> On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov <
>>>> andreysviyaz at gmail.com> wrote:
>>>> > 1) Is it used somewhere? In the datasheet there is probable errors,
>>>> for
>>>> > example, 1PPS is specified as input.
>>>>
>>>> Use this datasheet, here it's marked as output:
>>>> http://www.transystem.com.tw/product/66/EB-570%20Data%20Sheet%20V1.4.pdf
>>>> Probably you have an older version of the datasheet.
>>>>
>>>> > 2) There are inputs Reset and Standby. The first can be left open,
>>>> and the
>>>> > second is possible need to be connected to to FPGA.
>>>>
>>>> Yes.
>>>>
>>>> > 3) There Is RTC_CLK_O we don't need him? And that there may be, 32768?
>>>>
>>>> Could you route it to a test-point or a 2-pin IDC? I don't think we
>>>> need this, but it's better to have an ability to access it.
>>>>
>>>> > 4) Which of two UART's better to use or are they equivalent? There
>>>> are no
>>>> > any words in datasheet about it.
>>>>
>>>> Use TX0/RX0 (pins 13/14), which is default to NMEA - see the datasheet
>>>> above.
>>>>
>>>> > 5) Unfortunately no place for both on PCB and we can use either
>>>> EB-230 or
>>>> > EB-570.
>>>>
>>>> Then we have to use EB-570.
>>>>
>>>>
>>>> --
>>>> Regards,
>>>> Alexander Chemeris.
>>>> CEO, Fairwaves LLC / ООО УмРадио
>>>> http://fairwaves.ru
>>>>
>>>
>>>
>>
>
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What new in UmTRXv2 (in addition to fixed of all known issues).

1. New smaller PCB 2U size (100x160mm) helps to make housing much easily.
2. New EB-570 GPS module instead of EB-230.
3. Master/slave clock switching circuits work properly and through independed I/O connectors.
4. Protection devices for DC and all coax connectors has been added.
5. All components reconsidered to meet to industrial requirements -40`C for IP65 outdoor housing.
6. External control/LED panel can be used to make easily IP65 housing design.
7. Wider connector to supply and control external RF board with preselector, LNA, ATT, diversity switch...
8. Onboard +20dBm predriver for 0.4-2.5GHz band with ORL>16dB.
9. Debug clock can be used as high speed differential pair.
10. Thermal area added for hot IC's at bottom side to use 10x10mm thermal pads to the heatsink instead of FAN's.
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