ADALM-Pluto Rev. D | Stopped to work after set Ext. Clock

    Hello,


    I'm setting up my QO-100 station and everything was working perfectly for reception for few weeks only since the SG Labs preamp and amplifier still haven't arrived.


    After connecting and installing the U.FL-SMA plug and inserting the commands to change the reference signal to "external" from the LeoBodnar GPS, my adalm-pluto no longer accepts connections over the network with the SDR-Console. I also unable to connect via direct USB to PC although I have access via ssh with putty to the IP.


    I use LeoBodnar GPS with lowest output power and 50MHz clock that go to Frequency Divider board that I build to get 25MHz for LNB as well.


    I've been trying to find help on the internet for 1 day, but nothing seems to work, and I need help if any friends here can help.


    I collected the diagnostic log and the result of some commands, which I leave below:


    =======================================

    Welcome to:

    ______ _ _ _________________

    | ___ \ | | | / ___| _ \ ___ \

    | |_/ / |_ _| |_ ___ \ `--.| | | | |_/ /

    | __/| | | | | __/ _ \ `--. \ | | | /

    | | | | |_| | || (_) /\__/ / |/ /| |\ \

    \_| |_|\__,_|\__\___/\____/|___/ \_| \_|


    v0.35

    https://wiki.analog.com/university/tools/pluto

    # fw_printenv | grep correction

    xo_correction=50000000

    # fw_printenv attr_name

    attr_name=compatible

    # fw_printenv attr_val

    attr_val=ad9364

    # fw_printenv | grep correction

    xo_correction=50000000

    ====================================


    them I run this command: iio_info -n pluto.local


    Library version: 0.24 (git tag: v0.24)

    Compiled with backends: local xml ip usb serial

    ERROR: Avahi Resolver: Failed to resolve host 'pluto.local' : Timeout reached

    IIO context created with network backend.

    Backend version: 0.24 (git tag: v0.24)

    Backend description string: 192.168.1.71 Linux (none) 5.10.0-98231-g9dfba10b795d #54 SMP PREEMPT Mon Jul 11 14:38:48 CEST 2022 armv7l

    IIO context has 9 attributes:

    hw_model: AnalogDevicesPlutoSDRRev.C(Z7010-)

    hw_model_variant: 1

    hw_serial: 1044734c9605000d17001c00deb64fe162

    fw_version: v0.35

    ad9361-phy,xo_correction:

    ad9361-phy,model:

    local,kernel: 5.10.0-98231-g9dfba10b795d

    uri: ip:pluto.local

    ip,ip-addr: 192.168.1.71

    IIO context has 1 devices:

    iio:device0: xadc

    10 channels found:

    voltage5: vccoddr (input)

    2 channel-specific attributes found:

    attr 0: raw value: 1821

    attr 1: scale value: 0.732421875

    voltage0: vccint (input)

    2 channel-specific attributes found:

    attr 0: raw value: 1373

    attr 1: scale value: 0.732421875

    voltage4: vccpaux (input)

    2 channel-specific attributes found:

    attr 0: raw value: 2451

    attr 1: scale value: 0.732421875

    temp0: (input)

    3 channel-specific attributes found:

    attr 0: offset value: -2219

    attr 1: raw value: 2622

    attr 2: scale value: 123.040771484

    voltage7: vrefn (input)

    2 channel-specific attributes found:

    attr 0: raw value: -4

    attr 1: scale value: 0.732421875

    voltage1: vccaux (input)

    2 channel-specific attributes found:

    attr 0: raw value: 2451

    attr 1: scale value: 0.732421875

    voltage2: vccbram (input)

    2 channel-specific attributes found:

    attr 0: raw value: 1375

    attr 1: scale value: 0.732421875

    voltage3: vccpint (input)

    2 channel-specific attributes found:

    attr 0: raw value: 1370

    attr 1: scale value: 0.732421875

    voltage8: (input)

    2 channel-specific attributes found:

    attr 0: raw value: 3287

    attr 1: scale value: 0.244140625

    voltage6: vrefp (input)

    2 channel-specific attributes found:

    attr 0: raw value: 1702

    attr 1: scale value: 0.732421875

    1 device-specific attributes found:

    attr 0: sampling_frequency value: 961538

    No trigger on this device

    ========================================================


    My config.txt file is:

    # AnalogDevicesPlutoSDRRev.C(Z7010-AD9363)

    # Device Configuration File

    # 1. Open with an Editor

    # 2. Edit this file

    # 3. Save this file on the device USB drive

    # 4. Eject the device USB Drive

    # Doc: https://wiki.analog.com/univer…s/pluto/users/customizing


    [NETWORK]

    hostname = pluto

    ipaddr = 192.168.2.1

    ipaddr_host = 192.168.2.10

    netmask = 255.255.255.0


    [WLAN]

    ssid_wlan =

    pwd_wlan =

    ipaddr_wlan =


    [USB_ETHERNET]

    ipaddr_eth =

    netmask_eth = 255.255.255.0


    [SYSTEM]

    xo_correction = 50000000

    udc_handle_suspend = 0

    # USB Communication Device Class Compatibility Mode [rndis|ncm|ecm]

    usb_ethernet_mode = 0


    [ACTIONS]

    diagnostic_report = 0

    dfu = 0

    reset = 0

    calibrate = 0


    ==================================================


    I have attached the diagnostic file.



    Any way to roll back the Pluto for Factory defauls settings or RESET everything to default and start again from scratch?


    Appologize for long post, I understand is quite boring to read this kinds of posts, I learned a lot here before decided to build my own QO-100 Station, and I have help from some of you too.


    Appreciate your time if you read until here. Hope to have my Pluto back.


    73 CT7ABD
    Fabiano

    Quote from DC7KG

    Hi,


    the Pluto uses 40 MHz x 2 = 80 MHz, you have to change the factor from 2 to 1, when you use 50 MHz.


    Detlev

    Sorry but I´m not sure if I understand you answer.
    Is pluto able to be set to 50MHz instead 40MHz or not?

    This is the circuit im using.



    Anyway I´m not able anymore to roll back settings and now i can´t access my pluto anymore.

    The Pluto can uses clock frequencies up to 320 MHz, you have to choose the right scaling factor to get near to 80 MHz, i.e 320 x 1/4. Pluto uses 40 x 2 = 80 and when you use 50 MHz, then you have to change the factor to 1. 50 x 1 = 50.

    Quote from iu4gav

    https://drive.google.com/drive…OwqBnVcw26nrg?usp=sharing


    Follow this guide

    Worked like a charm ! :thumbup:

    Now let come back and try againd to set it to External Ref. and clock of 50MHz

    I see manny diferent commands to achieve that, can please confirm that I can use this:

    a) Set to External clock:
    fw_setenv refclk_source external


    b) Define the frequency:
    fw_setenv ad936x_ext_refclk ‘<50000000>’


    Should change config.txt file also or not?


    Tnx de CT7ABD

    Fabiano, could you share here what you had to do to make it work with the external 50 MHZ reference?

    I'm sure others would benefit from the information.


    Initially you added these two settings, but it didn't work.

    fw_setenv refclk_source external

    fw_setenv ad936x_ext_refclk ‘<50000000>’


    What was done to make it work?


    Thanks!


    AB6RF

    HI,

    It was a nightmare, but I have notepad after get sucess, this is my notes:


    fw_setenv refclk_source external

    fw_setenv ad936x_ext_refclk "<50000000>"


    pluto_reboot reset


    73 de CT7ABD