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List:       usrp-users
Subject:    Re: [USRP-users] E312 RX_B issue
From:       Sam Reiter via USRP-users <usrp-users () lists ! ettus ! com>
Date:       2019-12-18 19:16:53
Message-ID: CANf970YcgCH0aBVFvUtGhfs0PokmjkNe3gK-1GBSs2rrr-BDLg () mail ! gmail ! com
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Isaac,

What version of UHD are you using to elicit this behavior?

Sam Reiter
Ettus Research


On Mon, Dec 9, 2019 at 9:21 PM Beeman, Isaac L. via USRP-users <
usrp-users@lists.ettus.com> wrote:

> Hello group,
>
>
>
> I have run into an issue with the RX_B port (channel 1) on the E312 that I
> haven't been able to make any sense of.
>
>
>
> RX_A (channel 0) works great: I get clear in-phase and quadrature
> components that I have been able to graph <https://imgur.com/dQRl5mN>.
> When I do the same thing with RX_B (channel 1), I get something
> completely unexpected <https://imgur.com/4WgU5R5>. I am using the same
> rate (=0.5 Msps) frequency (=900 MHz), gain (=50 dB), bandwidth (=200 kHz)
> on each and have had this happen whether I use both channels at the same
> time or read from RX_B individually.
>
>
>
> I haven't had anything like this happen when I transmit on both TX_A and
> TX_B, and I have tested this on multiple USRP E312 radios and 900 MHz
> antennas to make sure it wasn't something unrelated to the channel/port
> itself.
>
>
>
> Does anyone know what could be happening?
>
>
>
> -Isaac Beeman
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>

[Attachment #5 (text/html)]

<div dir="ltr">Isaac,<div><br></div><div>What version of UHD are you using to elicit \
this behavior?</div><div><br clear="all"><div><div dir="ltr" class="gmail_signature" \
data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr">Sam Reiter  \
<div>Ettus Research<br></div></div></div></div></div></div><br></div></div><br><div \
class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Dec 9, 2019 at 9:21 PM \
Beeman, Isaac L. via USRP-users &lt;<a \
href="mailto:usrp-users@lists.ettus.com">usrp-users@lists.ettus.com</a>&gt; \
wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px \
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">





<div lang="EN-US">
<div class="gmail-m_8398194028674980837WordSection1">
<p class="MsoNormal"><span style="font-family:Georgia,serif">Hello \
group,<u></u><u></u></span></p> <p class="MsoNormal"><span \
style="font-family:Georgia,serif"><u></u>  <u></u></span></p> <p \
class="MsoNormal"><span style="font-family:Georgia,serif">I have run into an issue \
with the RX_B port (channel 1) on the E312 that I haven't been able to make any sense \
of. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:Georgia,serif"><u></u>  \
<u></u></span></p> <p class="MsoNormal"><span style="font-family:Georgia,serif">RX_A \
(channel 0) works great: I get clear in-phase and quadrature components that I have \
been able to <a href="https://imgur.com/dQRl5mN" target="_blank">graph</a>. When I do \
the same thing with RX_B (channel 1), I get <a href="https://imgur.com/4WgU5R5" \
target="_blank">something completely unexpected</a>. I am using the same rate (=0.5 \
Msps) frequency (=900 MHz), gain (=50 dB), bandwidth (=200 kHz) on each and have had \
this happen whether I use both channels at the same time or read from  RX_B \
individually. <u></u><u></u></span></p> <p class="MsoNormal"><span \
style="font-family:Georgia,serif"><u></u>  <u></u></span></p> <p \
class="MsoNormal"><span style="font-family:Georgia,serif">I haven't had anything like \
this happen when I transmit on both TX_A and TX_B, and I have tested this on multiple \
USRP E312 radios and 900 MHz antennas to make sure it wasn't something unrelated  to \
the channel/port itself.<u></u><u></u></span></p> <p class="MsoNormal"><span \
style="font-family:Georgia,serif"><u></u>  <u></u></span></p> <p \
class="MsoNormal"><span style="font-family:Georgia,serif">Does anyone know what could \
be happening?<u></u><u></u></span></p> <p class="MsoNormal"><span \
style="font-family:Georgia,serif"><u></u>  <u></u></span></p> <p \
class="MsoNormal"><span style="font-family:Georgia,serif">-Isaac \
Beeman<u></u><u></u></span></p> </div>
</div>

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 </blockquote></div>



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