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Topic:
HDMI extenders not linking - does a network tester help?
This thread has 20 replies. Displaying posts 16 through 21.
OP | Post 16 made on Wednesday November 8, 2017 at 15:57
tomciara
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On November 8, 2017 at 13:14, gerard143 said...
I have had wire map pass. No shorts etc and the damn thing still won’t link up. Swap cables and all good.

This was to a sunbrite using snap 540 balun.

I was using structured cable products shielded direct burial cat 6. At first I noticed wiggling wire at balun would occasionally make link light. So I test cable. No issues. Wiggle cable every which way while testing. Passes. Swap to a second non direct burial cable. Worked fine. Said wtf. Ran a new length of direct burial. Same bs. Swapped baluns to another 540. Issue worse. Cable certifies.

Ultimately I said screw it and am running off the non direct burial wire. When I was talking to snap tech he said they were seeing issues on the 540.

Speed tests are indeed valuable. Very valuable. A cable can pass a wire map all day long but still not pass the speeds. A good meter is $1500 or so that can do this well. A cable “certifier” and “qualifier” are two diff things. Only one is actually a true legit speed rating you can sign off on during a prewire.

[Link: m.flukenetworks.com]

IMHO a VDV is very limited. In no way whatsoever is it all we need. In this business we all should be budgeting sooner rather then later for a tester that can certify a cable. It absolutely is a very valuable tool in network cable troubleshooting (even in HDMI balun usage).

I am trying to see if I read you right.  Yes, a VDV is very limited.  A cable certifier gives far more valuable info.  But if I get your comments (bold) above, you ran a new cable, certified it, and the extender would not link.  Did I get it right??

If so, in that case, certifying the cable was zero value.  Replacing the cable is the only fix, and requires no $1000 test gear - which in your case was of no help.
"Men occasionally stumble over the truth, but most of them pick themselves up and hurry off as if nothing ever happened." - Winston Churchill
Post 17 made on Wednesday November 8, 2017 at 16:41
gerard143
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That was a cut and paste typo. UsIng my iPhone. I did not have a certifier at the time. Should have said didn’t see if cable certifies.

More on this subject. Back in 2002 when I was in college still I got my first exposure to a cable certifier. It was a basic networking class early on in my degree where we learned how to terminate cat with rj45. After we got good at it he asked us to do our best possible termination then test it on the certifier. It was astonishing to see how anything less then an absolute stellar termination affected the speed the certifier would rate it for.

Just because a wire passes a map test ultimately means dick if it won’t pass the speeds it needs to. I’ve seen beautifully terminated cables only auto link up at 100 instead of gigabit at the switch. Reterminate and you might get Gigabit.

I could care less if no one wants to take the advice of adding a certifier to your arsenal. They save headaches plain and simple. IMHO any reputable firm should have them if they wanna be the best at their game in this field. The network is becoming one of the most important factors in these installs.

I got tired of being limited by a VDV. Even the $500 one I have. It’s a glorified continuity tester. They blow compared to a certifier.

Last edited by gerard143 on November 8, 2017 16:48.
OP | Post 18 made on Wednesday November 8, 2017 at 19:59
tomciara
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FYI, a tech at Snap A/V indicated that it would require 100 Mb/s for the extender to work. This cable only made it to 10.
"Men occasionally stumble over the truth, but most of them pick themselves up and hurry off as if nothing ever happened." - Winston Churchill
Post 19 made on Thursday November 9, 2017 at 08:18
andrewinboulder
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On November 8, 2017 at 19:59, tomciara said...
FYI, a tech at Snap A/V indicated that it would require 100 Mb/s for the extender to work. This cable only made it to 10.

Is he saying you can pass an HD signal with 100Mb/s or is that to just get basic functionality?
Post 20 made on Thursday November 9, 2017 at 12:30
lippavisual
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On November 8, 2017 at 13:14, gerard143 said...

IMHO a VDV is very limited. In no way whatsoever is it all we need. In this business we all should be budgeting sooner rather then later for a tester that can certify a cable. It absolutely is a very valuable tool in network cable troubleshooting (even in HDMI balun usage).

This is what helps us charge for service calls, even on TelData installs.

We keep all test results of every project we work on.

This way when the customer calls saying "X" number of jacks or cables aren't working, we can show them the results. Basically, makes them pay for our service because it's not working for some other reason.

9 times out of 10, the problems come from customer misuse or stupidity!
Post 21 made on Thursday November 9, 2017 at 12:52
Ernie Gilman
Yes, That Ernie!
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On November 9, 2017 at 12:30, lippavisual said...
9 times out of 10, the problems come from customer misuse or stupidity!

This is very important for two reasons:
It's totally true.
Customers will often not believe anything is their fault without massively overwhelming evidence, and even then they'll have to be convinced.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
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