'Re: [USRP-users] X310/SBX-120'

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List:       usrp-users
Subject:    Re: [USRP-users] X310/SBX-120
From:       Marcus_MÃ¼ller via USRP-users <usrp-users () lists ! ettus ! com>
Date:       2016-02-26 15:48:15
Message-ID: 56D073BF.5020800 () ettus ! com
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Dear Siddarth Mathur,

the LO of the SBX gets generated from the X310 reference clock via
fractional interpolation/decimation.
In other words, the frequency stability is mainly defined by the used
reference. The on-board ref has a frequency accuracy of 2.5ppm; if you
need more accuracy, then you could either use an external 10MHz source,
or a plug-in GPSDO.

Best regards,
Marcus Müller

On 02/25/2016 08:39 PM, Siddarth Mathur via USRP-users wrote:
> Hello everyone,
>
> I am using a X310 USRP with a SBX-120(400-4400 MHz Rx/Tx)
> daughterboard. I would like to know the expected maximum possible
> frequency discrepancy/drift in this board. It would be great if
>  someone can help me out with this.
>
> Thank you. 
>
> -- 
> Regards,
> Siddarth Mathur
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

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    Dear Siddarth Mathur,<br>
    <br>
    the LO of the SBX gets generated from the X310 reference clock via
    fractional interpolation/decimation.<br>
    In other words, the frequency stability is mainly defined by the
    used reference. The on-board ref has a frequency accuracy of 2.5ppm;
    if you need more accuracy, then you could either use an external
    10MHz source, or a plug-in GPSDO.<br>
    <br>
    Best regards,<br>
    Marcus Müller<br>
    <br>
    <div class="moz-cite-prefix">On 02/25/2016 08:39 PM, Siddarth Mathur
      via USRP-users wrote:<br>
    </div>
    <blockquote
cite="mid:CAAq_9PGFhW4Hou_c6ppey+MwNv8pmo0EW9Fv1d-PFnKN2s7ZGw@mail.gmail.com"
      type="cite">
      <div dir="ltr">Hello everyone,<br>
        <br>
        <font color="#000000">I am using a X310 USRP with a SBX-120(<span
style="font-family:arial,helvetica,sans-serif;line-height:36px">400-4400
            MHz Rx/Tx) daughterboard. I would like to know the expected
            maximum possible frequency discrepancy/drift in this board.
            It would be great if  someone can help me out with this.<br>
            <br>
            Thank you. </span></font>
        <div><br>
        </div>
        -- <br>
        <div class="gmail_signature">
          <div dir="ltr">Regards,
            <div>Siddarth Mathur</div>
          </div>
        </div>
      </div>
      <br>
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      <br>
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