Arrived to a place of relaxation and... started to work :(
There are questions about EB-570:
1) Is it used somewhere? In the datasheet there is probable errors, for example, 1PPS is specified as input. 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. 3) There Is RTC_CLK_O we don't need him? And that there may be, 32768? 4) Which of two UART's better to use or are they equivalent? There are no any words in datasheet about it. 5) Unfortunately no place for both on PCB and we can use either EB-230 or EB-570.
Best regards, Andrey Sviyazov.
Andrey,
On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov andreysviyaz@gmail.com wrote:
- 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.
- 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.
- 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.
- 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.
- Unfortunately no place for both on PCB and we can use either EB-230 or
EB-570.
Then we have to use EB-570.
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@gmail.com
Andrey,
On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov andreysviyaz@gmail.com wrote:
- 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.
- 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.
- 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.
- 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.
- 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
Here PCB file of project.
Best regards, Andrey Sviyazov.
2012/5/29 Andrey Sviyazov andreysviyaz@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@gmail.com
Andrey,
On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov andreysviyaz@gmail.com wrote:
- 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.
- 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.
- 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.
- 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.
- 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
Here PDF's
Best regards, Andrey Sviyazov.
2012/5/29 Andrey Sviyazov andreysviyaz@gmail.com
Here PCB file of project.
Best regards, Andrey Sviyazov.
2012/5/29 Andrey Sviyazov andreysviyaz@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@gmail.com
Andrey,
On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov andreysviyaz@gmail.com wrote:
- 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.
- 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.
- 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.
- 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.
- 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
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 issueshttp://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 18http://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@gmail.com
Here PDF's
Best regards, Andrey Sviyazov.
2012/5/29 Andrey Sviyazov andreysviyaz@gmail.com
Here PCB file of project.
Best regards, Andrey Sviyazov.
2012/5/29 Andrey Sviyazov andreysviyaz@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@gmail.com
Andrey,
On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov < andreysviyaz@gmail.com> wrote:
- 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.
- 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.
- 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.
- 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.
- 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
Hi Andrey,
Thank you for your e-mail.
This is a great news. Great ideas, great debug, great improvements. Thanks a lot.
The board looks fine but I will see in deeper details and let you know.
A question just comes to my mind. 20 dBm Tx output is very convenient. This would allow to saturate and achieve a very good PA efficiency. This is really nice. In case Tx output is 20 dBm are you sure we would not have any PCB Tx signal leakage problems ? A few months ago, you told me maximum Tx power was around 0 dBm to avoid problems. Did you find a solution to improve isolation and allow the 20 dBm Tx power ?
Anyway, thanks a lot. Again, the board seems to be really great. This would also bring a wonderful tool to the SDR, OpenBTS and OpenBSC communities. Thank you so much for this.
Best regards.
Jean-Samuel. :-)
On Tue, May 29, 2012 at 7:59 PM, Andrey Sviyazov andreysviyaz@gmail.comwrote:
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 issueshttp://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 18http://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@gmail.com
Here PDF's
Best regards, Andrey Sviyazov.
2012/5/29 Andrey Sviyazov andreysviyaz@gmail.com
Here PCB file of project.
Best regards, Andrey Sviyazov.
2012/5/29 Andrey Sviyazov andreysviyaz@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@gmail.com
Andrey,
On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov < andreysviyaz@gmail.com> wrote:
- 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.
- 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.
- 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.
- 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.
- 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
Hi Jean-Samuel.
Unfortunately nobody can say about isolation between Tx and Rx of the LMS6002 chip, about which I've told you. So, I decide to pre-amplify Tx because it can to reduce the output signal of the LMS. Anyway isolation of the PCB seems to be quite higher then inside LMS, I'm sure. And also, if I am wrong then we can bypass signal through C108-C109 to avoid this my mistake.
Best regards, Andrey Sviyazov.
2012/5/30 Jean-Samuel Najnudel - BJT PARTNERS SARL jsn@bjtpartners.com
Hi Andrey,
Thank you for your e-mail.
This is a great news. Great ideas, great debug, great improvements. Thanks a lot.
The board looks fine but I will see in deeper details and let you know.
A question just comes to my mind. 20 dBm Tx output is very convenient. This would allow to saturate and achieve a very good PA efficiency. This is really nice. In case Tx output is 20 dBm are you sure we would not have any PCB Tx signal leakage problems ? A few months ago, you told me maximum Tx power was around 0 dBm to avoid problems. Did you find a solution to improve isolation and allow the 20 dBm Tx power ?
Anyway, thanks a lot. Again, the board seems to be really great. This would also bring a wonderful tool to the SDR, OpenBTS and OpenBSC communities. Thank you so much for this.
Best regards.
Jean-Samuel. :-)
On Tue, May 29, 2012 at 7:59 PM, Andrey Sviyazov andreysviyaz@gmail.comwrote:
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 issueshttp://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 18http://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@gmail.com
Here PDF's
Best regards, Andrey Sviyazov.
2012/5/29 Andrey Sviyazov andreysviyaz@gmail.com
Here PCB file of project.
Best regards, Andrey Sviyazov.
2012/5/29 Andrey Sviyazov andreysviyaz@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@gmail.com
Andrey,
On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov < andreysviyaz@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
Hi Andrey,
Thank you very much for your reply.
Yes, great idea. I think this really makes sense. Adding this amplifier would be better in most cases and cannot be worse than just saturating the LMS Tx without amplifier. Now I understand and fully agree with you.
Best regards.
Jean-Samuel. :-) Le 30 mai 2012 22:28, "Andrey Sviyazov" andreysviyaz@gmail.com a écrit :
Hi Jean-Samuel.
Unfortunately nobody can say about isolation between Tx and Rx of the LMS6002 chip, about which I've told you. So, I decide to pre-amplify Tx because it can to reduce the output signal of the LMS. Anyway isolation of the PCB seems to be quite higher then inside LMS, I'm sure. And also, if I am wrong then we can bypass signal through C108-C109 to avoid this my mistake.
Best regards, Andrey Sviyazov.
2012/5/30 Jean-Samuel Najnudel - BJT PARTNERS SARL jsn@bjtpartners.com
Hi Andrey,
Thank you for your e-mail.
This is a great news. Great ideas, great debug, great improvements. Thanks a lot.
The board looks fine but I will see in deeper details and let you know.
A question just comes to my mind. 20 dBm Tx output is very convenient. This would allow to saturate and achieve a very good PA efficiency. This is really nice. In case Tx output is 20 dBm are you sure we would not have any PCB Tx signal leakage problems ? A few months ago, you told me maximum Tx power was around 0 dBm to avoid problems. Did you find a solution to improve isolation and allow the 20 dBm Tx power ?
Anyway, thanks a lot. Again, the board seems to be really great. This would also bring a wonderful tool to the SDR, OpenBTS and OpenBSC communities. Thank you so much for this.
Best regards.
Jean-Samuel. :-)
On Tue, May 29, 2012 at 7:59 PM, Andrey Sviyazov andreysviyaz@gmail.comwrote:
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 issueshttp://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 18http://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@gmail.com
Here PDF's
Best regards, Andrey Sviyazov.
2012/5/29 Andrey Sviyazov andreysviyaz@gmail.com
Here PCB file of project.
Best regards, Andrey Sviyazov.
2012/5/29 Andrey Sviyazov andreysviyaz@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@gmail.com
> Andrey, > > On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov < > andreysviyaz@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 >
Hi Andrey. Nice work. Is there is big list of all of the changes that have been incorporated into the new design? This change record would be very helpful.
A minor English language note to avoid unintentional bad puns-- you might not want to have a filename with "ass" in it. Perhaps just spell out "assembly"? ;)
-Robin
On Mon, May 28, 2012 at 10:13 PM, Andrey Sviyazov andreysviyaz@gmail.com wrote:
Hi all.
Sorry Robin and Sylvain, I did not check CC first time. Here project files and my small explanation for you.
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@gmail.com
Andrey,
On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov andreysviyaz@gmail.com wrote:
- 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.
- 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.
- 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.
- 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.
- 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
Hi Robin!
List of changes not yet ready (soon). And thank you for your help in English :)
Best regards, Andrey Sviyazov.
2012/5/29 Robin Coxe coxe@close-haul.com
Hi Andrey. Nice work. Is there is big list of all of the changes that have been incorporated into the new design? This change record would be very helpful.
A minor English language note to avoid unintentional bad puns-- you might not want to have a filename with "ass" in it. Perhaps just spell out "assembly"? ;)
-Robin
On Mon, May 28, 2012 at 10:13 PM, Andrey Sviyazov andreysviyaz@gmail.com wrote:
Hi all.
Sorry Robin and Sylvain, I did not check CC first time. Here project files and my small explanation for you.
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@gmail.com
Andrey,
On Sun, May 20, 2012 at 6:46 PM, Andrey Sviyazov <
andreysviyaz@gmail.com>
wrote:
- 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.
- 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.
- 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.
- 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.
- 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
-- Robin Coxe | Close-Haul Communications, Inc. | Boston, MA +1-617-470-8825
-
Alexander Chemeris -
Andrey Sviyazov -
Jean-Samuel Najnudel - BJT PARTNERS SARL -
Robin Coxe