In this video, I'm going to show you how to
certify an LC to LC duplex link,
using the one jumper reference,
The GTX CableAnalyzer
with the series 2 fiber modules in the back.
And today I'm going to be doing Multimode.
These are the series 2,
because they have interchangeable
adapters on them. That's what's going to
allow me to do a one jumper reference.
I've already changed the standard
connector that comes with this,
which is SC, to LC, and I've done that
on the remote unit already.
In order to do a one jumper reference,
we need to be using hybrid
test reference cords, or TRCs.
They're hybrid because
at one end we have duplex LC,
that makes sense
we're testing duplex LC today,
the other end a little bit strange.
We have LC but we also have an FC
connector with this red thing on it
which is called a mandrel.
And it's critical that you use a mandrel
otherwise your readings
are going to be pessimistic.
The way this works is we
take our red SC connector
and connect it to the output port
on the main unit.
Then, not through a bulkhead adapter,
I'm going to connect it directly
to the input port on the remote unit
and because this is LC now, I can do that.
I have a 50-50 chance
of getting this correct.
Which one of these is it going to be?
Well, these are Fluke TRC's,
and the way this works is
red is hot, black is cold.
Our output is hot, our input is cold.
So that tells me I'm going to connect
my black LC to the remote unit.
I'm then going to grab my other
test reference cord and do the same
in the opposite direction.
So, with my mandrel attached,
I'm going to take my SC, connect it
to the output port on the remote unit,
and then take my black,
which is cold, and connect it
to the input port.
And you hear that chirp.
Now I should say at this stage is,
you'll notice on the table here,
I've got a whole bunch of
cleaning and inspection equipment.
I've already inspected and cleaned
these test reference cords
without the inspection equipment
and without the correct cleaning equipment
this is not going to be very reliable for you.
You need inspection equipment.
Alright, so, let's talk about
setting up the DTX CableAnalyzer.
I'm going to rotate the dial to 'setup',
and with fiberglass highlighted
I'm going to hit the ENTER key.
My test limit is currently set to TIA.
If I wanted to change that to ISO
I'd hit the ENTER key,
f1 'More',
and go down to ISO
where I see the 14763-3 standard.
My fiber type is currently selected
as OM2, now that's an issue,
because I'm testing OM3 today.
I need to change that to OM3.
Why is that important?
At the bottom of your LinkWare
test report you're going to see
a list of supported applications.
that list is going to be dependent
upon this fiber type selected here.
If I'd left it as OM2, any links
greater than 82 meters,
10G base SR,
would not show up at the bottom.
So this is an important setting.
I've got Remote End Setup.
I'm in Smart Remote mode, so that stays.
I've got bi-directional testing,
and that's currently selected at no.
Neither the TIA or ISO requires that,
however, your customer consultant
may require this,
so please check with them first.
Then we'll go across to tab number 2,
where we see the number of adapters.
This is an important setting, because
this is going to affect your test limit.
It's set to 2 because the link I'm testing today
is a simple patch panel to a patch panel.
So I have a bulkhead adapter at one end
and a bulkhead adapter at the other end.
Two adapters. And because I'm not setting
a reference through a bulkhead adapter,
then my adapter count is going to be 2.
My memory splices is zero, even though
I'm using mechanical connectors today.
And when I say mechanical connectors,
I'm talking about types such as the UniCam,
which have a mechanical splice inside.
That's part of the connector, you do not
add an extra splice count in there
for each of those connectors.
My connector type is LC, that's not going to
affect the outcome of the test result.
That's just going to affect the help screens
on the DTX CableAnalyzer.
And then I've also got my test method.
It's set to one jumper, because I'm
jumping from the main to the remote unit
in one hop. I'm not going through a
bulkhead adapter. And finally, on number 3,
I've got my index of refraction.
This is going to affect the length
reported by the DTX CableAnalyzer.
So it's important to go to the vendor's website,
download the latest datasheet,
and make sure you have
the correct values in here.
Okay, let's set a reference.
I'm going to rotate the dial to
'special functions', and we
'Set Reference' highlighted.
I'm going to hit the ENTER key,
and it's going to draw a picture of
my setup that I've just completed.
So, I've allowed my sources to stabilize,
and this is very important.
You need to allow them to warm up,
and that can take 5 minutes.
It can take longer depending on how cold
your units are first thing in the morning.
So, hit the TEST key,
and what it's going to do now is
it's going to zero out any losses
at the output connector and those test
reference cords connected between
the main and the remote unit.
And it's going to come back with
some loss values.
And, as a guide,
if it's 50 micron, we want this better
than -24 1/2 dBM.
If it's 62 1/2 micron,
we want it better than -20 dBM,
and if it's better- if it's 9 micron,
we want it better than -8 dBM.
That doesn't mean to say that our test
reference cords are in good condition,
we're going to be doing a check
a little bit later on to make sure
they're in good condition.
So, everything looks fine there.
I'm going to hit the f2, 'OK' key.
I have the option here
of putting the length of the cords
that I'm using for testing today.
Again, that's not going to affect
the outcome of the test result,
but it will show up in your
LinkWare report on your PC.
So I'm going to press f2, 'OK'.
Now, here's a very important step
that many people miss.
We want to make sure
the sources are stabilized.
So we're going to rotate
the dial to 'auto test',
and hit the TEST key.
If the sources have stabilized,
my loss reading here should be
0 dB for each fiber path.
So I'm going to ignore the pass
in the top right-hand corner there,
and look at the loss reading on the
input fiber. That's the input port
on the main unit here.
And it is showing 0 and 0 dB.
I don't care about limit or margin,
I just want to make sure it's zero,
so that tells me my source on my
remote unit is now stabilized.
I'm going to go down to my
output fiber on the main unit here,
and that's also showing 0 and 0 dB.
So, good, I know they're stabilized.
On to the next step.
Okay, so now that I set a reference,
on to the next stage.
We're going to remove the test reference cord
from the input on the main unit.
And I'm going to put a protective cap on it.
I don't want to damage it.
I'm also going to remove it
from the input port on the remote unit.
And, again, I'm going to put my
protective cap on there,
to make sure it doesn't get damaged.
The next step I'm going to do
is on the main unit here,
at the same end where the mandrel is
I've now got this LC.
That's going to get plugged into
the input port on the main unit.
And then I'm going to do the same
on the remote unit here.
So, on the remote unit now,
I am presented with duplex LC,
and, on the main unit,
I'm also presented with LC duplex.
So this plugs into the patch panel
at one end, this plugs into the
patch panel at the other end
and I could go off and do a test.
The problem is we don't actually know
how good these cords are.
So, before you do that,
Take an LC bulkhead adapter
and connect the main
and remote units together.
Of course, red goes to black,
and black goes to red. And, again,
If I've done this right I'll hear a chirp.
Then what I'm going to do
is I'm going to run an auto test
to see what the loss is, here.
And I want this to be better than
0.1 dB if possible.
Let's do that now.
Okay, so let's run an auto test.
And my input fiber, which is my
fibert going to the main unit here,
has a loss of 0.09 and 0.10
which is great.
And my other fiber
has a loss of 0.09 and 0.04,
So I know my test reference cords
are in excellent condition.
Now, what you could do at this stage
is ask the technician to save these results
as TRC 1 and TRC 2, for example.
And then you have documented evidence
that your test reference cords
were in good condition
when you did the measurement.
Now that we've verified
our test reference cords,
we begin starting to make the measurements.
So, very important,
particularly if you're on a building site,
is when we disconnect our
connectors in the middle of that
bulkhead adapter, we cap the fibers.
Because the last thing we want these
to happen to them
is for them to get damaged.
Take this off to one end,
take this off to the other end,
and start testing.
And that is how you set up successfully
for an LC to LC duplex link,
testing using a one jumper reference.