Kevin: I find your videos incredibly helpful...i work for a Telco in Saskatchewan, Canada...we're trying to train up new staff to use EXFO's awesome tools...to test 100Gbps backbone links
Darrell, I apologize for the delay I am not sure why I did not respond. I hope the training is going well for the new staff. It is amazing how much bandwidth we are pushing around.
David I apologize I do not check my comments often. I need to do a better job. Is this something you are still interested in? This is not an official EXFO site just a place i put videos to test them.
Your welcome. IOLM just like OTDR is limited by dynamic range. If you look up the specs on OTDR/iOLM if the dynamic range is 38dB. You then remove 5dB for noise and I like to remove another 2 as margin you end up with 31dB of loss you can test.
As usual, thanks for the awesome video. Two questions: 1. Does iOLM requires APC connector? 2. Is iOLM feature upgradable on any EXFO's iOLM ready OTDRs? Sorry for having a lot of questions. Received our MAX720C recently. And currently exploring it. Thanks Kevin
No worries about the questions. It is recommended to have an APC connector on the OTDR if you want to enable iOLM. Most of our test sets ship with APC connectors it gives us much better performance. If your unit says it is iOLM ready then it would just need a simple software key to enable it. If you have a UPC connector on the unit it can be replaced with an APC and upgraded to iOLM. Give the free trial of iOLM a shot. I am going to create a video talking about the new features of iOLM that include short fast and Medium link configurations under the Optimode setting in iOLM.
Hi Kevin, this is a great video! Just to ask if we can use this video as a training material reference? don't worry we don't get money on this, just a training reference only :)
@kevin.Peres is it important to use a sizable launch cable when looking for faults in a fiber loop of less than 4000 ft? I’m troubleshoot shorter residential or business loops. We are running ASE or gpon.
Bob, Sorry for the delay. Launch cable length is always an important consideration. For such short links you could get away with a shorter launch cable. If everything is good you should only be using 3-5ns. Assuming you are not testing through the splitter. You can use this formula to determine minimum launch cable length. Pulse width in (ns) divided by 10. Convert to meters and multiply by 2. Example: 1 μs -> 1000ns / 10 -> 100m x 2 = 200 meter -> Appropriate launch cable (multiplying the distance times 2 is to add margin for the pulse to recover you can safely go down to 1.5 times)
Hi Kevin, Thanks for video. it gives more information about iOLM in iOLM, if there is a splitter of 50:50 after certain distance, how iOLM shows the link view ? I mean does software shows both out put after that splitter or only one?
Jenson, You are very welcome. If you are testing from the OLTS through the splitter you will only see one composite trace. Same with an OTDR. Depending on the dynamic range of the OTDR you will be measuring all the ports but folded on to one trace. What you will see is the loss from the splitter lets say a 1x32 you will have approx 17dB of loss if you have multiple ports used on the splitter depending on the distance from the splitter you will see a connection for the end of each drop. With APC connectors it may look like a splice if it has low reflection. I hope that answers your question.
Hi Eng Kevin Thank You for You efforts but Would I Ask you question about inspection Fiber Please Tell devices you are using ? And it is function is cleaning tool actauly or just verify dirty of fiber Please explain more
Salah my friend. I used the FIP-435B which is a fiber inspection probe. To clean I prefer a hybrid wet to dry method. Cleaning fiber connectors is instrumental in the performance of an optical network.
Do I need to use a longer launch for iOLM test?? Am using 20M patch now and its all passing but some panel ports are failing, while testing with 500M its all passing. Pls advise
iOLM with its multipulse acquisition method does require a shorter launch cable. 20M, for the most part, is fine but as the connector degrades on either the launch cable or the iOLM port you will start to get experience traces that require longer PW, or the reflection from the contaminated port will start to affect the deadzone and this would affect shorter launch cables. It could also be with a 500M launch cable it is using a longer PW to test through the launch and you are losing spacial resolution. I would have to look at the traces to be sure. When you next test with iOLM check your launch conditions. Select the first element that is your launch. Make sure the loss is below 0.5 and the reflection in in the low -60dB or better.
I noticed my EXFO OTDR is set up for the green APC(angled tip) connection...... but blue SC (squared or flat) also seems to work. Should I be concerned with this interface? Is using an adapter crucial
@@KevinPeres Thank you very much. Does the APC connection match in a keyed fashion in other words does the short side of one connector meet the long side of the other connector? Or are they just floating and the angle attitude doesn't matter. Thanks
@@dizzolve They are keyed. The orientation is important. The angle is typically 8 degrees if you look straight down at the connector with the key up you will notice the slight angle.
Sorry for the slow response. Are you talking about the loss associated with the change in index of refraction? or loss from refraction say off the cladding?
Hello, reach out to our sales group at sales@exfo.com. Give them your SN and contact information and tell them you would like to speak to a local representative to discuss adding iOLM. Let me know if you have any questions.
