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Hi Levente,<br>
<br>
Given the spacing, I suspect all that plastic-encased gear will
suffer crashes or communication dropouts when the HF keys up. It's
also likely that it's producing detectable RFI in the HF spectrum
with such close proximity. Not sure if RFI on the RX side is
important in your situation or not.<br>
<br>
The first thing likely to break under TX will be your Ethernet
links. They are long conductors which couple well to HF, and their
signaling can be affected by HF frequencies. At one of our sites,
which is colocated with a medium power FM broadcast station, we had
to switch to fiber to feed the modem with data. The PoE is
thankfully surviving the FM signal, so we're dual-feeding it with
CAT5 for PoE and fiber for data. This modem is also built inside a
metal enclosure, with SFP and RJ45 ports available, so it was an
easy fix.<br>
<br>
In your situation, it sounds like a harder fix, given everything is
in plastic and the sector antennas are integrated with the modems.
The mANT30 should do a good job of rejecting HF though. It's a
waveguide feed with a subreflector, so there are no exposed dipole
elements. The waveguide will filter out any HF. The dish modem
should live in a metal enclosure though. If it doesn't need to
support 5 or 10MHz bandwidths, then Mikrotik sells 802.11ac modems
that are metal enclosed and feature SFP ports for fiber. If it does
need to support 5 & 10MHz, there are these metal enclosures that
can hold a Mikrotik PCB:<br>
<br>
<a class="moz-txt-link-freetext" href="https://rfelements.com/products/enclosures/stationbox-alu/stationbox-s-carrier-class-2">https://rfelements.com/products/enclosures/stationbox-alu/stationbox-s-carrier-class-2</a><br>
<br>
They also have enough room to house some fiber conversion gear. I'd
suggest the same for the sectors, along with compatible antennas..<br>
<br>
Or just key up and see what happens. :)<br>
<br>
--Bart<br>
<br>
<br>
<div class="moz-cite-prefix">On 10/6/2022 10:29 AM, Levente Buzás
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CADt-ynt0SJbjCrSYLh0ajznqr3uZBg0Xz8gS-QSrsC_eHqo88A@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Hi everyone,
<div><br>
</div>
<div>I am reaching out to ask for advice regarding HF radiated
emissions immunity for Mikrotik gear. At our HAMWan site, we
have three sectors (mANTBox 15s) and two dishes (mANT30PA
with BaseBox5) in the vicinity (<10feet) of a multi-kW EIRP
HF (10-15-20m) antenna. Since we have installed the HAMWan
gear, the HF gear has been offline but I am worried that it
will get damaged once we turn things back on. Mikrotik support
did not have any information on this. Does anyone have any
specs or practical experience to share? Any advice would be
much appreciated. </div>
<div><br>
</div>
<div> Thanks for your time!</div>
<div><br>
</div>
<div>73,</div>
<div><br>
</div>
<div>Levente VA7QF</div>
<div><br>
</div>
-- <br>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">
<div dir="ltr">Levente Buzas, MASc, EIT
<div><span style="color:rgb(34,34,34)">Laboratory Manager</span><br
style="color:rgb(34,34,34)">
<span style="color:rgb(34,34,34)">Propagation Laboratory</span></div>
<div>Department of Electrical and Computer Engineering<br
style="color:rgb(34,34,34)">
<span style="color:rgb(34,34,34)">University of Victoria</span><br
style="color:rgb(34,34,34)">
<a href="mailto:lbuzas@uvic.ca"
style="color:rgb(17,85,204)" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">lbuzas@uvic.ca</a>
<div style="color:rgb(34,34,34)">+1.250.818.3937 </div>
</div>
</div>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
PSDR mailing list
<a class="moz-txt-link-abbreviated" href="mailto:PSDR@hamwan.org">PSDR@hamwan.org</a>
<a class="moz-txt-link-freetext" href="http://mail.hamwan.net/mailman/listinfo/psdr">http://mail.hamwan.net/mailman/listinfo/psdr</a>
</pre>
</blockquote>
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