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List: usrp-users
Subject: [USRP-users] The signal received by B205mini is unstable
From: luteo <xdcple () 163 ! com>
Date: 2022-10-26 5:37:31
Message-ID: 665f49e9.5052.18412cbb604.Coremail.xdcple () 163 ! com
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When testing the B205mini, we found that the SMA connector was tightened to the most \
tight, but there may be no signal or the signal is weak.
Of course not always. Sometimes it is better to loosen the SMA connector a little.
In short, the reception effect requires repeated adjustment of the sma connector. \
Even after the sma is tightened, applying an external force on the plug position may \
change the quality of the received signal.
There is no similar problem on other types of USRP boards. It is determined that it \
is not an antenna problem.
We used B210 and B205mini for comparison. See the attachment for video results. \
¡°B205-antenna.mp4¡± & ¡°B210-antenna.mp4¡±
We used another B205mini for comparison. The phenomenon is the same. See the \
attachment for video results. ¡°B205-DuPont line.mp4¡± & ¡°B205-DuPont \
line-Acrylic.mp4¡±
We are not sure whether this phenomenon is caused by the absence of a shielded \
enclosure. But we don't think it will have such a big impact.
I want to ask if there is any way to solve this problem.
´ÓÍøÒ×163ÓÊÏä·¢À´µÄ³¬´ó¸½¼þ
B205-antenna.mp4 (3.61M, 2022Äê11Ô 25ÈÕ 13:35 µ½ÆÚ)
ÔÚÏßÔ¤ÀÀ | Ï ÔØ
B205-DuPont line.mp4 (2.75M, 2022Äê11Ô 25ÈÕ 13:35 µ½ÆÚ)
ÔÚÏßÔ¤ÀÀ | Ï ÔØ
B205-DuPont line-Acrylic.mp4 (17.49M, 2022Äê11Ô 25ÈÕ 13:35 µ½ÆÚ)
ÔÚÏßÔ¤ÀÀ | Ï ÔØ
B210-antenna.mp4 (4.56M, 2022Äê11Ô 25ÈÕ 13:35 µ½ÆÚ)
ÔÚÏßÔ¤ÀÀ | Ï ÔØ
[Attachment #5 (text/html)]
<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div \
style="line-height: 1.7;"><p style="margin: 0px;">When testing the B205mini, we found \
that the SMA connector was tightened to the most tight, but there may be no signal or \
the signal is weak.</p><p style="margin: 0px;"><br></p><p style="margin: 0px;">Of \
course not always. Sometimes it is better to loosen the SMA connector a little.</p><p \
style="margin: 0px;"><br></p><p style="margin: 0px;">In short, the reception effect \
requires repeated adjustment of the sma connector. Even after the sma is tightened, \
applying an external force on the plug position may change the quality of the \
received signal.</p><p style="margin: 0px;"><br></p><p style="margin: 0px;">There is \
no similar problem on other types of USRP boards. It is determined that it is not an \
antenna problem.</p><p style="margin: 0px;"><br></p><p style="margin: 0px;">We used \
B210 and B205mini for comparison. See the attachment for video results. ¡°<span \
style="background-color: rgb(227, 234, 244); color: rgb(102, 102, 102); font-family: \
"Microsoft Yahei", verdana; font-size: 12px; white-space: \
nowrap;">B205-antenna.mp4</span>¡± & ¡°<span style="background-color: rgb(227, \
234, 244); color: rgb(102, 102, 102); font-family: "Microsoft Yahei", \
verdana; font-size: 12px; white-space: nowrap;">B210-antenna.mp4</span>¡±</p><p \
style="margin: 0px;"><br></p><p style="margin: 0px;">We used another B205mini for \
comparison. The phenomenon is the same. See the attachment for video results. ¡°<span \
style="background-color: rgb(227, 234, 244); color: rgb(102, 102, 102); font-family: \
"Microsoft Yahei", verdana; font-size: 12px; white-space: \
nowrap;">B205-DuPont line.mp4</span>¡± & ¡°<span style="background-color: \
rgb(227, 234, 244); color: rgb(102, 102, 102); font-family: "Microsoft \
Yahei", verdana; font-size: 12px; white-space: nowrap;">B205-DuPont \
line-Acrylic.mp4</span>¡±</p><p style="margin: 0px;"><br></p><p style="margin: \
0px;">We are not sure whether this phenomenon is caused by the absence of a shielded \
enclosure. But we don't think it will have such a big impact.</p><p style="margin: \
0px;"><br></p><p style="margin: 0px;">I want to ask if there is any way to solve this \
problem.</p></div></div><div id="divNeteaseBigAttach" \
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style="background:#fff;padding:4px"><div style="clear:both;height:36px;padding:6px \
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(3.61M, 2022Äê11Ô 25ÈÕ 13:35 µ½ÆÚ)</span></div><div style="padding:4px \
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href="http://fs.163.com/fs/preview/?file=Sy2W9lTU-w7vguqZrlWFpokrrFG4wg5EhEj3dMzeTYbDf \
Sr3lygA3p9yWJTf8RpsEiHvF7oIAGV5j9A5bObShQ&title=The%20signal%20received%20by%20B205mini%20is%20unstable">ÔÚÏßÔ¤ÀÀ</a> \
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style="float:left;width:36px"><a \
href="https://mail.163.com/large-attachment-download/index.html?p=X-NETEASE-HUGE-ATTAC \
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fileid="undefined" filename="B205-DuPont line.mp4" filesize="2881646" \
expiretime="1669354528730" target="_blank" \
style="color:#000;text-decoration:none">B205-DuPont line.mp4</a><span \
style="color:#bbb"> (2.75M, 2022Äê11Ô 25ÈÕ 13:35 µ½ÆÚ)</span></div><div \
style="padding:4px 0px;font-size:12px;line-height:14px"><a \
href="http://fs.163.com/fs/preview/?file=Sy2W9lTU-w7vguqZrlWFpiA1lNE2Ud3W3QvLDq8jg3Syy \
UkX84aeua9IwvDNKuSyBwBnqjWHYmxI8meJOpD52w&title=The%20signal%20received%20by%20B205mini%20is%20unstable">ÔÚÏßÔ¤ÀÀ</a> \
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ATTACHMENT&file=Sy2W9lTU-w7vguqZrlWFpiA1lNE2Ud3W3QvLDq8jg3SyyUkX84aeua9IwvDNKuSyBw \
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fileid="undefined" filename="B205-DuPont line-Acrylic.mp4" filesize="18342554" \
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style="color:#bbb"> (17.49M, 2022Äê11Ô 25ÈÕ 13:35 µ½ÆÚ)</span></div><div \
style="padding:4px 0px;font-size:12px;line-height:14px"><a \
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fileid="undefined" filename="B210-antenna.mp4" filesize="4779643" \
expiretime="1669354539896" target="_blank" \
style="color:#000;text-decoration:none">B210-antenna.mp4</a><span style="color:#bbb"> \
(4.56M, 2022Äê11Ô 25ÈÕ 13:35 µ½ÆÚ)</span></div><div style="padding:4px \
0px;font-size:12px;line-height:14px"><a \
href="http://fs.163.com/fs/preview/?file=Sy2W9lTU-w7vguqZrlWFpp2k2utmexby5pltUyAgi5fQ2 \
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