# LimeSDR board test fail
**URL:** https://discourse.myriadrf.org/t/limesdr-board-test-fail/13294
**Category:** General Discussion
**Created:** [11 August 2026 22:03 UTC](https://discourse.myriadrf.org/t/limesdr-board-test-fail/13294 "2026-08-11T22:03:35Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@vkshane](https://discourse.myriadrf.org/u/vkshane)
#### Post date: [11 August 2026 22:03 UTC](https://discourse.myriadrf.org/t/limesdr-board-test-fail/13294/1 "2026-08-11T22:03:35Z")
Hi All.
## I purchased a LimeSDR back in April and it was working pretty well other than occasional calibration issues. Yesterday, I noticed transmission power to be well down and I could no longer calibrate the unit after many tries. I plugged the unit into my LimeRFE device and thats when it decided to fail. I tested the LimeRFE with a Lime Mini I have and there was no issues. I ran several board tests afterward and the RF tests fail. Is anyone able to offer advise?
[TESTING STARTED]
-\>Start time: Tue Aug 11 18:04:33 2026
-\>LimeSuite version: 20.10.0-g1480bfea
-\>Device: LimeSDR-USB, media=USB 3.0, module=FX3, serial=0009083401881A29, index=0, HW=4, GW=2.23
Serial Number: 0009083401881A29
Chip temperature: 39 C
[Clock Network Test]
-\>FX3 GPIF clock test
Test results: 18729; 22485; 26241 - PASSED
-\>Si5351C test
CLK0: 17554 / 17554 - PASSED
CLK1: 17554 / 17554 - PASSED
CLK2: 17554 / 17554 - PASSED
CLK3: 17554 / 17554 - PASSED
CLK4: 17554 / 17554 - PASSED
CLK5: 17554 / 17554 - PASSED
CLK6: 17554 / 17554 - PASSED
-\>ADF4002 Test
Result: 10 - PASSED
-\>VCTCXO test
Results : 5112967 (min); 5113105 (max) - PASSED
-\>Clock Network Test PASSED
[FPGA EEPROM Test]
-\>Read EEPROM
-\>Read data: 19 01 15 19 01 15 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]
Note: The test should be run without anything connected to RF ports
-\>Configure LMS
-\>Run Tests (TX\_2-\> LNA\_L):
CH0 (SXR=800.0MHz, SXT=805.0MHz): Result:(-15.4 dBFS, 5.00 MHz) - PASSED
CH1 (SXR=800.0MHz, SXT=805.0MHz): Result:(-17.3 dBFS, 5.00 MHz) - PASSED
-\>Run Tests (TX\_1 → LNA\_W):
CH0 (SXR=1800.0MHz, SXT=1805.0MHz): Result:(-44.0 dBFS, -20.00 MHz) - FAILED
CH1 (SXR=1800.0MHz, SXT=1805.0MHz): Result:(-18.4 dBFS, 5.00 MHz) - PASSED
-\>Run Tests (TX\_2-\> LNA\_H):
CH0 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-19.5 dBFS, 5.00 MHz) - PASSED
CH1 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-14.9 dBFS, 5.00 MHz) - PASSED
-\>RF Loopback Test FAILED
=\> Board tests FAILED \<=
Elapsed time: 4.63 seconds
The only other odd thing is that the Mini also fails some of the tests, but appears to work fine.
Shane.
---
### Author:  [@andrewback](https://discourse.myriadrf.org/u/andrewback)
#### Post date: [13 August 2026 08:27 UTC](https://discourse.myriadrf.org/t/limesdr-board-test-fail/13294/2 "2026-08-13T08:27:41Z")
> [@vkshane](#):
>
> I noticed transmission power to be well down
Given the test results I assume you were using TX1\_1?
> [@vkshane](#):
>
> The only other odd thing is that the Mini also fails some of the tests, but appears to work fine.
Could you also post the LimeQuickTest results for this.
---
### Author:  [@vkshane](https://discourse.myriadrf.org/u/vkshane)
#### Post date: [13 August 2026 23:58 UTC](https://discourse.myriadrf.org/t/limesdr-board-test-fail/13294/3 "2026-08-13T23:58:56Z")
Hi Andrew.
Thanks so much for the reply!
To answer your first question, Yes, I was using TX1\_1
Below is the test for the LimeSDR Mini.
[TESTING STARTED]
-\>Start time: Thu Aug 13 03:59:01 2026
-\>LimeSuite version: 20.10.0-g1480bfea
-\>Device: LimeSDR Mini, media=USB 3, module=FT601, serial=1D588EB71F6314, index=0, HW=3, GW=1.30
Serial Number: 1D588EB71F6314
Chip temperature: 15 C
[Clock Network Test]
-\>REF clock test
Test results: 39108; 52305; 65502 - PASSED
-\>VCTCXO test
Results : 6710959 (min); 6711121 (max) - PASSED
-\>Clock Network Test PASSED
[FPGA EEPROM Test]
-\>Read EEPROM
-\>Read data: 13 0A 16 13 0A 16 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:(-23.6 dBFS, 5.00 MHz) - FAILED
-\>Run Tests (TX\_1 → LNA\_H):
CH0 (SXR=2100.0MHz, SXT=2105.0MHz): Result:(-18.9 dBFS, 5.00 MHz) - PASSED
-\>RF Loopback Test FAILED
=\> Board tests FAILED \<=
Elapsed time: 5.79 seconds
Thanks
Shane.
---
### Author:  [@andrewback](https://discourse.myriadrf.org/u/andrewback)
#### Post date: [14 August 2026 19:19 UTC](https://discourse.myriadrf.org/t/limesdr-board-test-fail/13294/4 "2026-08-14T19:19:48Z")
Tagging @zack and @Karolis . Though there may be a delay with colleagues on vacation.
---
### Author:  [@vkshane](https://discourse.myriadrf.org/u/vkshane)
#### Post date: [16 August 2026 20:01 UTC](https://discourse.myriadrf.org/t/limesdr-board-test-fail/13294/5 "2026-08-16T20:01:30Z")
Thank you for your reply.
Any advise they could give will be appreciated.
Shane.