# LIMESDR USB RF Loopback Test FAILED

**URL:** <https://discourse.myriadrf.org/t/limesdr-usb-rf-loopback-test-failed/4126>\
**Category:** LimeSDR\
**Created:** [3 February 2019 13:12 UTC](https://discourse.myriadrf.org/t/limesdr-usb-rf-loopback-test-failed/4126 "2019-02-03T13:12:21Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![cmrincon](https://avatars.discourse-cdn.com/v4/letter/c/2bfe46/32.png) [@cmrincon](https://discourse.myriadrf.org/u/cmrincon)\
**Post date:** [10 March 2019 09:57 UTC](https://discourse.myriadrf.org/t/limesdr-usb-rf-loopback-test-failed/4126/2 "2019-03-10T09:57:41Z")

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+1

[TESTING STARTED]  
-\>Start time: Sun Mar 10 10:50:39 2019

-\>Device: LimeSDR-USB, media=USB 3.0, module=FX3, serial=0009070105C61F0B, index=0  
Serial Number: 0009070105C61F0B

[Clock Network Test]  
-\>FX3 GPIF clock test  
Test results: 30472; 34228; 37984 - 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 : 5112948 (min); 5113076 (max) - PASSED  
-\>Clock Network Test PASSED

[FPGA EEPROM Test]  
-\>Read EEPROM  
-\>Read data: 12 02 09 12 02 09 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\_L):  
CH0 (SXR=800.0MHz, SXT=805.0MHz): Result:(-15.5 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:(-30.7 dBFS, 5.00 MHz) - FAILED  
CH1 (SXR=1800.0MHz, SXT=1805.0MHz): Result:(-32.7 dBFS, 5.00 MHz) - FAILED  
-\>Run Tests (TX\_2-\> LNA\_H):  
CH0 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-18.0 dBFS, 5.00 MHz) - PASSED  
CH1 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-15.5 dBFS, 5.00 MHz) - PASSED  
-\>RF Loopback Test FAILED

=\> Board tests FAILED \<=

Elapsed time: 6.47 seconds

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