<div dir="auto">BTW I learned a long time ago the reason why tdrs are so expensive is because of the cost of certification of each device. (think human hours) </div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 29, 2020, 1:34 PM Aaron Spangler <<a href="mailto:aaron777@gmail.com">aaron777@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">I made a simple one the other day. It can do LF/MF(not UHF+) style TDF if you push it in code. That's how I found the wires were continuous but paired wrong in one cable. See <a href="http://www.kg7bhp.org/2020/05/simple-tdr.html" target="_blank" rel="noreferrer">http://www.kg7bhp.org/2020/05/simple-tdr.html</a><div dir="auto"><br></div><div dir="auto">One could expand on that. I just threw it together after a bit. There are some mods we could do to test the shielding for common mode currents. But it the package would need to be cleaned up rather than in breadboard form.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 29, 2020, 1:21 PM Steve <<a href="mailto:stevewa206@gmail.com" target="_blank" rel="noreferrer">stevewa206@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div dir="auto">Also, when I had to use shielded cable....buying tested pre terminated is also a good way to go if you know the distance and have the weather proof shells that can accommodate it..... sometimes can’t be done.</div><div dir="auto"><br></div><div dir="auto">Steve </div></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 29, 2020 at 1:18 PM Darcy Buskermolen <<a href="mailto:darcyb@gmail.com" rel="noreferrer noreferrer" target="_blank">darcyb@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Correct, STP = Shielded Twisted Pair, vs UTP un-shielded twisted pair, which is what you normally see in everyday ethernet cable. </div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 29, 2020 at 1:15 PM Kenny Richards <<a href="mailto:richark@gmail.com" rel="noreferrer noreferrer" target="_blank">richark@gmail.com</a>> 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 dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small">Darcy - For those of us not in the know, what does "STP" stand for? I'm guessing it has todo with testing the shield termination? (Google failed me trying to look it up)</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small"><br>Thanks</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small">Kenny</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 29, 2020 at 1:07 PM Darcy Buskermolen <<a href="mailto:darcyb@gmail.com" rel="noreferrer noreferrer" target="_blank">darcyb@gmail.com</a>> 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 dir="ltr">Yes such a device does exist, they are going to be $$, a fluke or lantech unit will be well north of $1000.00 per test setup. STP make the options less readily available. You certainly want something more involved than a simple cable map function. <div><br></div><div>If STP can be removed from the must-have list, then <a href="https://pockethernet.com/" rel="noreferrer noreferrer" target="_blank">https://pockethernet.com/</a> is a decent value proposition</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 29, 2020 at 12:51 PM Steve <<a href="mailto:stevewa206@gmail.com" rel="noreferrer noreferrer" target="_blank">stevewa206@gmail.com</a>> 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><div dir="auto">Maybe get Fluke to donate? Anybody have connections or work for them?</div></div><div dir="auto"><br></div><div dir="auto">Just a thought.</div><div dir="auto"><br></div><div dir="auto">Steve N0FPF</div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 29, 2020 at 12:37 PM Bart Kus <<a href="mailto:me@bartk.us" rel="noreferrer noreferrer" target="_blank">me@bartk.us</a>> 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">HamWAN is in the business of deploying lots of long CAT5 cables, <br>
terminated by amateurs, in remote locations. We often have a hard time <br>
getting the terminations right. In the worst cases, the problems are <br>
only discovered once the cables are installed on a tower, and need to be <br>
re-terminated up there. A method of testing the cables before <br>
installing them would save us headaches and speed up deploys.<br>
<br>
Can someone volunteer to lead an effort to research the market and <br>
select an appropriate cable tester? HamWAN would then purchase at least <br>
2 of these, and keep them with folks who are doing site deploys.<br>
<br>
Here are some requirements I'd like the tester to meet:<br>
<br>
0) The tester is a reliable quality device.<br>
1) Ability to detect proper shield termination, since we use shielded <br>
CAT5 to keep RFI down.<br>
2) Ability to report performance characteristics of the cable, beyond a <br>
simple pass/fail LED.<br>
3) Ability to operate in rainy conditions.<br>
4) Battery powered, preferably rechargeable.<br>
5) UI friendly to color-blind people. :)<br>
<br>
Additional requirement suggestions welcome.<br>
<br>
--Bart<br>
<br>
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</blockquote></div></div>-- <br><div dir="ltr">Pardon the brevity, sent from a mobile device. So there.</div>
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</blockquote></div></div>-- <br><div dir="ltr" data-smartmail="gmail_signature">Pardon the brevity, sent from a mobile device. So there.</div>
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