To me the message at the end suggests even more strongly that there’s a 
hardware problem with the GPSDO installation. 

Sent from my iPhone

> On Sep 10, 2020, at 11:50 AM, Xiang Ma <[email protected]> wrote:
> 
> 
> But you can see there is an info:
> [INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929b
> 
> Also, when I run /usr/local/lib/uhd/examples/sync_to_gps
> 
> It shows:
> Creating the USRP device with: ...
> [INFO] [UHD] linux; GNU C++ version 7.5.0; Boost_106501; 
> UHD_3.15.0.HEAD-0-gaea0e2de
> [INFO] [X300] X300 initialization sequence...
> [INFO] [X300] Maximum frame size: 1472 bytes.
> [INFO] [X300] Radio 1x clock: 200 MHz
> [INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929b
> [INFO] [0/DmaFIFO_0] Initializing block control (NOC ID: 0xF1F0D00000000000)
> [INFO] [0/DmaFIFO_0] BIST passed (Throughput: 1300 MB/s)
> [INFO] [0/DmaFIFO_0] BIST passed (Throughput: 1317 MB/s)
> [INFO] [0/Radio_0] Initializing block control (NOC ID: 0x12AD100000000001)
> [INFO] [0/Radio_1] Initializing block control (NOC ID: 0x12AD100000000001)
> [INFO] [0/DDC_0] Initializing block control (NOC ID: 0xDDC0000000000000)
> [INFO] [0/DDC_1] Initializing block control (NOC ID: 0xDDC0000000000000)
> [INFO] [0/DUC_0] Initializing block control (NOC ID: 0xD0C0000000000000)
> [INFO] [0/DUC_1] Initializing block control (NOC ID: 0xD0C0000000000000)
> Using Device: Single USRP:
>   Device: X-Series Device
>   Mboard 0: X310
>   RX Channel: 0
>     RX DSP: 0
>     RX Dboard: A
>     RX Subdev: UBX RX
>   RX Channel: 1
>     RX DSP: 0
>     RX Dboard: B
>     RX Subdev: UBX RX
>   TX Channel: 0
>     TX DSP: 0
>     TX Dboard: A
>     TX Subdev: UBX TX
>   TX Channel: 1
>     TX DSP: 0
>     TX Dboard: B
>     TX Subdev: UBX TX
> 
> Synchronizing mboard 0: X310
> 
> **************************************Helpful Notes on Clock/PPS 
> Selection**************************************
> As you can see, the default 10 MHz Reference and 1 PPS signals are now from 
> the GPSDO.
> If you would like to use the internal reference(TCXO) in other applications, 
> you must configure that explicitly.
> You can no longer select the external SMAs for 10 MHz or 1 PPS signaling.
> ****************************************************************************************************************
> 
> Waiting for reference lock...LOCKED
> 
> Error: ValueError: locked(): unable to determine GPS lock statusThis could 
> mean that you have not installed the GPSDO correctly.
> 
> Visit one of these pages if the problem persists:
>  * N2X0/E1X0: http://files.ettus.com/manual/page_gpsdo.html * X3X0: 
> http://files.ettus.com/manual/page_gpsdo_x3x0.html
> 
>  * E3X0: http://files.ettus.com/manual/page_usrp_e3x0.html#e3x0_hw_gps
> 
>> On Thu, Sep 10, 2020 at 9:38 AM Marcus D. Leech via USRP-users 
>> <[email protected]> wrote:
>> On 09/10/2020 10:12 AM, Xiang Ma via USRP-users wrote:
>>> Hi,
>>> 
>>>    I am using the /usr/local/lib/uhd/utils/query_gpsdo_sensors to get gps 
>>> information, but it shows: Waiting for the GPSDO to warm up...........
>>> No response from GPSDO in 30 seconds
>>> 
>>> This is the whole information:
>>> 
>>> hu@hu:~$ /usr/local/lib/uhd/utils/query_gpsdo_sensors
>>> 
>>> Creating the USRP device with: ...
>>> [INFO] [UHD] linux; GNU C++ version 7.5.0; Boost_106501; 
>>> UHD_3.15.0.HEAD-0-gaea0e2de
>>> [INFO] [X300] X300 initialization sequence...
>>> [INFO] [X300] Maximum frame size: 1472 bytes.
>>> [INFO] [X300] Radio 1x clock: 200 MHz
>>> [INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929b
>>> [INFO] [0/DmaFIFO_0] Initializing block control (NOC ID: 0xF1F0D00000000000)
>>> [INFO] [0/DmaFIFO_0] BIST passed (Throughput: 1304 MB/s)
>>> [INFO] [0/DmaFIFO_0] BIST passed (Throughput: 1306 MB/s)
>>> [INFO] [0/Radio_0] Initializing block control (NOC ID: 0x12AD100000000001)
>>> [INFO] [0/Radio_1] Initializing block control (NOC ID: 0x12AD100000000001)
>>> [INFO] [0/DDC_0] Initializing block control (NOC ID: 0xDDC0000000000000)
>>> [INFO] [0/DDC_1] Initializing block control (NOC ID: 0xDDC0000000000000)
>>> [INFO] [0/DUC_0] Initializing block control (NOC ID: 0xD0C0000000000000)
>>> [INFO] [0/DUC_1] Initializing block control (NOC ID: 0xD0C0000000000000)
>>> Using Device: Single USRP:
>>>   Device: X-Series Device
>>>   Mboard 0: X310
>>>   RX Channel: 0
>>>     RX DSP: 0
>>>     RX Dboard: A
>>>     RX Subdev: UBX RX
>>>   RX Channel: 1
>>>     RX DSP: 0
>>>     RX Dboard: B
>>>     RX Subdev: UBX RX
>>>   TX Channel: 0
>>>     TX DSP: 0
>>>     TX Dboard: A
>>>     TX Subdev: UBX TX
>>>   TX Channel: 1
>>>     TX DSP: 0
>>>     TX Dboard: B
>>>     TX Subdev: UBX TX
>>> 
>>> Setting the reference clock source to "gpsdo"...
>>> Clock source is now gpsdo
>>> Setting the reference clock source to "gpsdo"...
>>> Time source is now gpsdo
>>> Waiting for ref_locked...USRP Locked to Reference.
>>> **************************************Helpful Notes on Clock/PPS 
>>> Selection**************************************
>>> As you can see, the default 10 MHz Reference and 1 PPS signals are now from 
>>> the GPSDO.
>>> If you would like to use the internal reference(TCXO) in other 
>>> applications, you must configure that explicitly.
>>> ****************************************************************************************************************
>>> Waiting for the GPSDO to warm up...........
>>> No response from GPSDO in 30 seconds
>>> 
>>> I do plug the GPSDO to the board, and I plug the 5V active GPS antenna in 
>>> the `GPS ANT` connector at the rear panel. But I am not sure why. I just 
>>> want to get the location information. (btw, is it because I am in the 
>>> indoor area?)
>>> 
>>> Thanks,
>>> 
>>> Xiang Ma
>>> 
>>> -- 
>>> Xiang Ma, Ph.D. Student
>>> College of Engineering
>>> Utah State University
>>> E-mail:[email protected]
>>> 
>>> 
>> I would re-check the GPSDO installation.  You may have bent one of the pins 
>> when you installed it.
>> 
>> Also, it won't be able to get a "fix" unless the antenna can "see" the sky.  
>> Most buildings are not that transparent at 1575MHz.
>> 
>> 
>> 
>> _______________________________________________
>> USRP-users mailing list
>> [email protected]
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
> 
> 
> -- 
> Xiang Ma, Ph.D. Student
> College of Engineering
> Utah State University
> E-mail:[email protected]
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