# LimeSDR mini unreliable

**URL:** <https://discourse.myriadrf.org/t/limesdr-mini-unreliable/5237>\
**Category:** LimeSDR\
**Created:** [9 October 2019 20:02 UTC](https://discourse.myriadrf.org/t/limesdr-mini-unreliable/5237 "2019-10-09T20:02:20Z")\
**Posts on this page:** 6\
**Page:** 2

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**Author:** ![Zack](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/zack/32/89_2.png) [@Zack](https://discourse.myriadrf.org/u/Zack)\
**Post date:** [29 September 2020 05:22 UTC](https://discourse.myriadrf.org/t/limesdr-mini-unreliable/5237/21 "2020-09-29T05:22:34Z")

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Hi @en1gma,

Could you please repeat Quick Test with open RF ports and post log file here, please.

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**Author:** ![en1gma](https://avatars.discourse-cdn.com/v4/letter/e/f17d59/32.png) [@en1gma](https://discourse.myriadrf.org/u/en1gma)\
**Post date:** [30 September 2020 11:50 UTC](https://discourse.myriadrf.org/t/limesdr-mini-unreliable/5237/22 "2020-09-30T11:50:42Z")

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en1gma@M4800:~$ LimeUtil --find

- [LimeSDR Mini, media=USB 3.0, module=FT601, addr=24607:1027, serial=1D3BD0C4F0CDFF]

en1gma@M4800:~$ LimeQuickTest  
[TESTING STARTED]  
-\>Start time: Wed Sep 30 06:49:29 2020

-\>Device: LimeSDR Mini, media=USB 3.0, module=FT601, addr=24607:1027, serial=1D3BD0C4F0CDFF, HW=1, GW=1.30  
Serial Number: 1D3BD0C4F0CDFF  
Chip temperature: 45 C

[Clock Network Test]  
-\>REF clock test  
Test results: 39597; 52794; 461 - PASSED  
-\>VCTCXO test  
Results : 6710981 (min); 6711146 (max) - PASSED  
-\>Clock Network Test PASSED

[FPGA EEPROM Test]  
-\>Read EEPROM  
-\>Read data: 12 03 10 12 03 10 02  
-\>FPGA EEPROM Test PASSED

[LMS7002M Test]  
-\>Perform Registers Test  
-\>External Reset line test  
Reg 0x20: Write value 0xFFFD, Read value 0xFFFD  
Reg 0x20: value after reset 0x0FFFF  
-\>LMS7002M Test PASSED

[RF Loopback Test]  
-\>Configure LMS  
-\>Run Tests (TX\_2 -\> LNA\_W):  
CH0 (SXR=1000.0MHz, SXT=1005.0MHz): Result:(-25.5 dBFS, 5.00 MHz) - FAILED  
-\>Run Tests (TX\_1 -\> LNA\_H):  
CH0 (SXR=2100.0MHz, SXT=2105.0MHz): Result:(-11.4 dBFS, 5.00 MHz) - PASSED  
-\>RF Loopback Test FAILED

=\> Board tests FAILED \<=

Elapsed time: 2.49 seconds

en1gma@M4800:~$

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<div class="post-metadata">

**Author:** ![en1gma](https://avatars.discourse-cdn.com/v4/letter/e/f17d59/32.png) [@en1gma](https://discourse.myriadrf.org/u/en1gma)\
**Post date:** [1 October 2020 21:36 UTC](https://discourse.myriadrf.org/t/limesdr-mini-unreliable/5237/23 "2020-10-01T21:36:59Z")

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is there any more info you require @zach?

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<div class="post-metadata">

**Author:** ![Zack](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/zack/32/89_2.png) [@Zack](https://discourse.myriadrf.org/u/Zack)\
**Post date:** [6 October 2020 11:06 UTC](https://discourse.myriadrf.org/t/limesdr-mini-unreliable/5237/24 "2020-10-06T11:06:00Z")

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Looks like TX\_2 or LNA\_W RF port is dead.

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<div class="post-metadata">

**Author:** ![en1gma](https://avatars.discourse-cdn.com/v4/letter/e/f17d59/32.png) [@en1gma](https://discourse.myriadrf.org/u/en1gma)\
**Post date:** [8 October 2020 02:49 UTC](https://discourse.myriadrf.org/t/limesdr-mini-unreliable/5237/25 "2020-10-08T02:49:02Z")

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im guessing TX2 as I think LNA\_W is good but how can i tell for sure?

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**Author:** ![andrewback](https://avatars.discourse-cdn.com/v4/letter/a/22d042/32.png) [@andrewback](https://discourse.myriadrf.org/u/andrewback)\
**Post date:** [10 October 2020 09:42 UTC](https://discourse.myriadrf.org/t/limesdr-mini-unreliable/5237/26 "2020-10-10T09:42:11Z")

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Generate a carrier and measure output on TX2, using a spectrum analyser or power meter. Generate a test signal to input on LNA\_W, or tune to a known signal and compare received spectrum with another LimeSDR Mini.

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