LMS7002EVB problem

[abete...@gmail.com]

Dear support team,

we have bought a LMS7002EVB v3 from Digikey to evaluate the LMS7002 chip.

I have tried to do the “transmitter setup and basic testing” as described in the “Quick starter manual” paragh. 5.2, but, after the Tune always get the warning “Tune failed, CSW_VCO selected 255” and, observing the TX1_A on the spectrum analyzer no carrier is present at 2.14GHz.

Attached you can found the “Control LMS7002 GUI” log.

 

There is something wrong or that I have missing to do.

Please can you give me a suggestion on how I can solve this issue?

Is “FW:0” indication at bottom of “Control LMS7002” window right? The firmware version 0 is right?

 

Thank you!

Kind regards.

Giuseppe.

[r.vad...@limemicro.com]

Hello Giuseppe, 

Change the reference clock frequency to 52MHz in SXR and SXT window. this should help to tune PLL.

Best Regards,
Ricardas Vadoklis

From: abete...@gmail.com Sent: Wednesday, 15 July 2015 15:48 To: limemicro-...@googlegroups.com Reply To: limemicro-...@googlegroups.com Subject: LMS7002EVB problem

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[abete...@gmail.com]

Hi Ricardas,

thank you. It works!

I've measured the TCXO frequency and is 52MHz. The GUI initialize the reference clock value to 30.72MHz and also in schematic there's no any reference to a 52MHz reference clock.

Best regards.

Giuseppe.

[r.vad...@limemicro.com]

Hi Giuseppe, 

‎Great! There was one batch of boards that we've shipped with 52MHz crystal, but 32MHz is our default.

Let me know if you have any questions.

Best Regards,
Ricardas Vadoklis

From: abete...@gmail.com Sent: Thursday, 16 July 2015 15:14 To: limemicro-...@googlegroups.com; r.vad...@limemicro.com Reply To: limemicro-...@googlegroups.com Cc: r.vad...@limemicro.com Subject: Re: LMS7002EVB problem

[DB]

Hello,

I saw your post about the LMS7002EVB. I am interested in this chip, and the EVB, but I don't see any significant amount of discussion or other information about these items online, other than the occasional question such as yours. Would you be willing to share your thoughts and experience with the EVB board with me? Also, can you direct me to any other online forums that you might be plugged into which contain information from other users of the EVB board and/or the LMS7002 chip itself?

Thanks very much for any information you can provide.

DB.

[Ricardas Vadoklis]

Hello DB,

Few links that might be within your interest:

1. General forum about Lime related products [link].
   
2. LMS7002M control Driver in C code - [link].
   

Best Regards,
Ricardas Vadoklis,
Senior System and Test Engineer,
Lime microsystems, 
r.vad...@limemicro.com
+44 0 1483 685 065

[DB]

Hi Ricardas,

Thanks. However, to follow-up, I would point out that there are only 8 references in total to the LMS7002 in the entire forum located at the first link you posted, and one of those posts is really about the Lime 6002 chip with only a passing reference to the 7002. The second link is interesting but again very narrowly focused on a driver for the chip which appears to be still a work-in-progress. 

First of all, given that the 7002 is a distinctly different chip from the 6002, why not set up a separate Category within the forum that your first link references, as a convenient starting point for all questions/posts relating to the 7002 chip and EVB, rather than have such topics be so intertwined and co-mingled with other topics on the support forum?

Secondly, I am looking for higher-level information about products that are being developed around the LMS7002M, since I am looking to purchase a complete 7002-based Software Defined Radio (SDR) peripheral, similar to those available for the Lime 6002 (from Nuand, for example) and also for similar chips from other manufacturers such as Analog Devices, and which is supported by open-source software such as GNU Radio .Where can I find such information? The LMS7002M chip has been available commercially for over 1 year already, so surely there are commercial products available, or close to available, on the market that use this 7002 MIMO chip?

Thanks for any input that can be provided.

DB

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[JUNAID Muhammad]

Hi,

I have the same issue but not fixed by changing Rf clock....

Regards 

Junaid 

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