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How to test the insertion loss of Fiber Optic Cable
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11 жыл бұрынwww.discount-low-voltage.com/T...
I got tired of all the wizards and scientist overexplaining every detail when it comes to testing fiber, so I grabbed a light source and power meter out of inventory and made a fiber link with a couple of wall mount boxes so I can easily show you how to do it.
Here's some words from the manufacture regarding this fiber test kit - The Silicon ZOOM II / Dual OWL 850 Test Kit is ideal for LAN managers and installers who need to do simple attenuation tests on their multimode networks.
The Silicon ZOOM II (Zeroed Output Optical Meter) is an economical fiber optic power meter designed to provide accurate testing of multimode fiber cables at 850nm wavelength. The 4-digit 7-segment LCD display shows power readings with a resolution of 0.01dB, power units in dBm, dB, or uW, and battery power level. The Silicon ZOOM II comes configured with a 2.5mm universal port for connection to SC, ST, and other connector types that have a 2.5mm ferrule.
Cable loss budget - www.vcalc.com/wiki/KurtHeckma...
Fiber Optic Performance Standards:
50/125 Fiber @ 850 wavelength 3.5 dB/km - Bandwidth 500 (OM2), 2000 (OM3), 3500 (OM4)
50/125 Fiber @ 1300 1.5 dB/km - Bandwidth 500
62.5/125 Fiber @ 850 3.5 dB/km
62.5/125 Fiber @ 1300 1.5 dB/km
9/125 premise @1310 1.0 dB/km @1550 1.0 dB
9/125 Outside Plant @1310 and 1550 0.5 dB/km
@Splinter4077 6 жыл бұрын
For anyone curious about the reason of the mandrel, at least from my humble knowledge: each channel in multimode is transmitted at a slightly different angle, so when the receiver gets it, it can figure out which channel it is because of the angle. The higher the angle, the "higher order" of mode it is. The mandrel is a tightly wrapped coil that causes higher orders(higher angles) of light to lose their angle and transmit more directly. It does not affect lower orders of channels. This is mainly done for testing purposes, if you don't use a mandrel, the tester might accidentally report a higher dB loss than it really is. Have a good day :)
@perrooceaniko2005 5 жыл бұрын
this is correct .. the higher modes are eliminated or attenuated strongly after the mandrel . Only the main modes are of interest. By the way, heavy losses show a so small piece of cable …
@somethingsomethingsomethingdar 5 жыл бұрын
Best explanation I have heard and it makes sense
@HOLIGHTFiberOptic 3 жыл бұрын
Wow
@MVMH 11 жыл бұрын
All good Mercy..... Show and Tell done well. Appreciate the "asking for the order", (perhaps a little smoother).....but overall a great job on a complex subject. Nice work.
@NguyenHien-rl1ux 2 жыл бұрын
so touching for an excellent video
@aeperera585 7 жыл бұрын
Good show! Just a little correction... when you write the result as a loss do not write it as a negative number; it should be positive because "loss" takes care of the negative, else it becomes negative of a negative which is "gain". Loss of 3.00 dB and not loss of -3.00 dB
@perrooceaniko2005 5 жыл бұрын
very rightly said !! or you may say, in a complicated math way, a gain of -3db !!!!!!!! :-) :-) :-)
@GOOGIRAJA 8 жыл бұрын
NICE VIDEO
@trevormasterson8035 8 жыл бұрын
Great Video Mercy. Can you recommend a chart or graph that will give installers a Rough guide to what Acceptable losses we can expect to find out in the field. Tks. Trevor.
@dusanveselka3240 7 жыл бұрын
The accepted maximum db loss is 1.5 for multimode and thats what you should expect (your loss will be higher with smaller fibre, lets say 50/125 than lets say 62.5/125).
@puwit321 9 жыл бұрын
Hi Mercy, Great tutorial. Question: if you want to measure total loss to include customer patch cords at both ends, do you still need to use the jumper with the mandrel after setting reference? Meaning plugging in customer patch cords directly to the light source and meter. Thanks!
@suvidaajaykumar6580 3 жыл бұрын
Very informative
@SUPPERBETO 10 жыл бұрын
Ok thanks. i already found it , didnt know how is called it
@mikeprince3206 4 жыл бұрын
Before testing would you not zero out the meter with both transmit and receive patch chords connected to one another with a some sort of coupler?
@sidhukothapalli8814 7 жыл бұрын
thanks bro
@umeshchau8039 6 жыл бұрын
Please make video cd testing for optic fiber and cd full from al so
@bonb33 9 жыл бұрын
I have been getting different results with positive and negative values, when I am doing insertion loss testing. One result will be .026dB while another will be -0.15dB. What does that signify?
@destroyerdragon2002 6 жыл бұрын
So is -0.14db acceptable for a 400 ft run? Was my first splice... I was supervised but unaided ;P
@quacktony 10 жыл бұрын
Another question, what is the mandrels purpose?
@oucdan9049 9 жыл бұрын
when is insertion loss in negative and when is it in positive?
@SkillsBattles 2 жыл бұрын
Great!
@ayiteyquaye6762 2 жыл бұрын
I need of the fiber optic cable cable power management
@2WheelsAs1 10 жыл бұрын
I work on aircraft fitted with fiber optic lines and have a couple of questions. I have sma connectors (threaded coupler with a brass barrel that slides into a female hole in the box), are all these types of connectors the same size? Also, does your test kit (light source and meter) come ready to use with these sma connectors or do I need a adapter? Thanks for any help.
@2WheelsAs1 10 жыл бұрын
***** Thanks for the info!
@chrishowells2753 8 жыл бұрын
Mercy, I need to do a check on a piece of bare fiber prior to putting the connector on the fiber. are there adapters that let you non destructive grab onto a single fiber strand on both ends and check for loss. Thanks in advance.
@mumbles1justin 8 жыл бұрын
+Chris Howells as soon as a tip is replaced, removed etc from fiber your loss readings will change. there are bare fiber adapters on the market if you need to take TDR or OTDR readings that "grab fiber". But bare fiber adapters aren't very useful with OLTS readings.
@ChadMtl 10 жыл бұрын
What testers do you have for "single mode", & are there any testers available for use with smart phones?
@shamshulqamar3807 8 жыл бұрын
+Mercy Salinas we have face some problem in LS/PM test results of single mode like this 1310nm _____0. 65db 1550nm_____0. 8169db cable length 0. 161km sir what is the solution
@SUPPERBETO 10 жыл бұрын
COULD TELL ME HOW IS THAT THING CALLED WITH THE CORD WRAP??
@gregdherrman 10 жыл бұрын
why throw out a patch cord without cleaning it or scoping it to see if that's where your loss is coming from?
@venusfotechvlog7455 4 жыл бұрын
Good
@quacktony 10 жыл бұрын
Is there a chart you have that I can go by to see what the db should be at for certain lengths? Is it best to have more or less insertion loss? I'm very new to fiber cabling.
@quacktony 10 жыл бұрын
***** So I'm testing a 36ft LC to LC multimode. Its showing -18db. Is that good? Power source is 850nm.
@quacktony 10 жыл бұрын
***** I might be doing something wrong. I'm going to reset everything.
@quacktony 10 жыл бұрын
***** I love the reply though LOL.
@quacktony 10 жыл бұрын
***** Zeroed out my meter, powered both the source and meter on and let it sit for 5 minutes, saved current reading of -18.43dbm, I disconnect the meter and hook up the 36ft cable, now it reads -0.65db.
@quacktony 10 жыл бұрын
***** Thanks for your help in figuring out my new toy!!!
@surajkumar-hk2nw 6 жыл бұрын
nice vodeo
@luckyash530 2 жыл бұрын
I have 1490 nm -19.18 dbm is good or bad ?
@TheBlackf250 8 жыл бұрын
"black magic" haha isn't that the truth! Great straight forward video, thanks!
@tayoahmed4573 9 жыл бұрын
is there other name for fibre tester?
@mumbles1justin 8 жыл бұрын
+Tayo Ahmed OLTS
@mohammedashfak9671 6 жыл бұрын
aiyoo salli
@abhagimakapar3045 6 жыл бұрын
tusant cable net NEPAL
@gabakusa 4 жыл бұрын
it cost more than $50 that kit ;-)
@majedyouness990 3 жыл бұрын
how you take the reference without connecting the two patchcord with zero db connector ????????????? you r using only one patchcord for reference hhhh
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