Archive for the ‘Fiber Optic’ category

Two for One

May 12th, 2012

Our client that feeds us via a Fiber Line from The Switch with an SDI with Embedded audio now wants to send us two separate signals. As I understand it, it’s just a delayed Satellite feed that could be done at the transmitter. But they seem to want control, don’t we all.

So I told them the only way was either rent another Fiber line to us or use two encoders and mux them together and then have two decoders up here to get the two separate programs. I know our old ASI/SDI fiber converters would do either one, ASI or SDI. But the new box AT&T is using is different and I don’t know if it handles ASI, have to ask.

I told then it would be a few thousand to do this. I will keep you informed.

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Day Six at NAB, Last and shortest.

April 20th, 2012

My last day at NAB 2012 started with a finale tour of the exhibit floor where I found a couple of optical routers, the one from Neutrik uses what looks to me like an RF Hybrid, it has four ports and uses heat to change a substance that bends light. It has one input and two outputs. I would like to know more about this.

The other one use piezoelectrics to bend light tubes, it looks like and does cross connects in free space.

Over all the show was a great success for TheOLE, I made new contacts and made many new friends.

 

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Day Four at NAB (for me anyway)

April 17th, 2012

Today started off with a breakfast with Dielectric where they told us about modern design tools for making antennas. Now they use computer modeling which saves a lot of time and trail and error. Then they went on to talk about the FCC spectrum grab, I mean repackaging and how sharp tuned mask filters will be needed to squeeze everyone into the few channels left over. The difference  between a 6 pole and 8 pole filter is quite amazing when talking about adjacent channels of different power levels. Dielectric also talked about their low power TV filters and antennas and how they put the same effort into them as their big brothers.

Oh yes, I got a cool medallion commemorating Dielectric’s 70th year. Check it out on Pinterest

Then it was off to the show. I learned more about fiber optics and keeping them clean and how an Ethernet to F/O box costs almost the same as a network switch with F/O SFP. But I found that Yellow Brick sells one for about $550 instead of $850.

I saw Sisvel show has a Titled approach to 3D transmission. I talked about this last year when I first heard about it but this was the first time I could see it in action. Looked good.

Talked with the Dolly guys, they have the Dolly Drive which combines Cloud storage and local backup as well as incremental and shared storage. They make a good case for an integrated approach. Still don’t know the cost.

And I talked with Derek at Fis Blue about F/O and tactical fiber, they also make cleaning kits and tools for F/O. I will recommend we get some for the tower.

Then the station called cause they could not get the playlist to work on the Matco, they powered it off and on but it would not turn on, until I told them about the power switch on the front behind the little doors,then it came up.

My boss’ station in Kansas is having problems so I went over to the booth of the MFG and talked to them. I saw the transmitter for the first time even though I have been asked many questions about it. The problem still exists.

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Day Three (or Opening Day) at NAB 2012

April 17th, 2012

So this is the first day exhibits are open and we can see new products but my first priority was Fiber Optics, for my upcoming tutorial. I talked with Neutrik about their F/O connectors and they offered me all sorts of art work and even video to help with my video.  I see that all the rugged outdoor F/O connector incorporate some type of auto capping system where the optical ends are protected when ever the connector is not inserted to it’s mate to reduce the possibility of dirt blocking the light transfer.

Then it was on to Belden and their field installable F/O connectors. I saw these last year but now I’m much more interested. They can do many popular connectors in both Single Mode (SM) and Multi Mode (MM) cable. They gave me a demo of how it works which I taped on my iPhone for the tutorial. Belden does not recommend their connectors for permanent install as the loss,or attenuation is much higher than a Fusion splice. Each connector is about $10 to $14 each but can be used up to 5 times. I think we should get a kit from them for the tower now that we are working in F/O so we can quickly make up cables in house while we wait for factory built ones.

There’s  a lot of small F/O to video adapters now, not much bigger than RG-11 coax cable in thickness. Now these would be converting video to analog light, by which I mean the brightness follows the amplitude of the video signal (analog video). For SDI I guess it can be just flashes, or digital, which is what most F/O is these days.

The difference it that if you send analog light you really need angled F/O ends. This is where the end of the fiber is at a 5° to 8° angle and mates to the same degree end. This reduces light reflections at the connector, for digital light this does not seem to matter as the reflected light is bounced back down the Fiber to the transmitter, where it bounces again back to the receiver. This causes noise in the received signal, but with digital light, you  know, just on-off-on-off the reflections and thus the noise is not a problem. So today there’s not much call for angled ends in F/O.

I then talked with Emcore who makes a lot of F/O equipment for broadcast. They just resently announced a 120Gbps fiber cable, WOW!

Over at Advanced Fiber Products I saw the first Self Normalizing Optical Patch Bay, now that’s a feat. I still don’t quite understand how they are doing it but they assure me it does. They also have a unique system of Fiber to Coax adapters that you can monitor via a Web GUI. Some come with a readout on top as well and even that can be remoted to a near by panel.

I was over at Evertz to get more information on how to install their L-Band Router. We plan to start with a 64 x 64 but to leave room for expansion for up to 128 x 128. I want to make sure I put the equipment in the right places in the rack and not have to move them later. Then I was over at ETL Systems and to look at their L-Band router, it’s bigger than Evertz but it also comes with some stuff external, like the LNB power supplies, where as the Evertz is integrated. Not a bad system, and it’s used a lot.

On Tuesday it’s off to a Dielectric breakfast and a talk with Yellow Brick and their F/O offerings.

To see pictures of NAB 2012 take a look at my NAB board at Pinterest - http://pinterest.com/theole/  and keep up to date by checking out my Twitter Feed here - http://twitter.com/#!/theOLEOrg

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Wrong Fiber

April 11th, 2012

Multi Mode 62.5/125

We order some Fiber Optic patch cables the other day and when they arrived and I opened the box I was greeted by a sea of Orange.

What we ordered was Dual SC on one end and Dual LC on the other, on Single Mode fiber. Single Mode fiber is usually, alway Yellow, and Multi Mode fiber is usually, always Orange. Then on top of that the Orange patch cords have printed on them 62.5/125. This is referring to the 62.5 nm (nano meter) fiber strand inside and the 125 nm outer jacket, which makes it too big to be Single Mode.

Right on the packing slip is states these are non returnable (custom made) and I think, “did I order the wrong cables?” But then I look a little further down and it states, ‘single mode’.

Single Mode 8.3/125

I e-mailed to the manufacture and they told me their assembler did not read the order correctly and they will be sending us new, single mode cables.

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More and more fiber

March 1st, 2012

The wiring project it moving along with Fiber Optic cable being installed we’re almost done. Here you can see the yellow armored F/O cable being run to the trays where the armor is striped off and clamped to the tray.

 

 

Here are the F/O trays

 

 

 

 

 

Here’s the tools that Bill was using to install the F/O

 

 

 

 

 

 

 

 

The hammer is really useful with Fiber

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Fiber from a Client

February 23rd, 2012

Fiber in - SDI out

One of our clients has setup a studio / control room of their own. Up until now we had to run their server and sat feed because there was no link between them and us at the transmitter. Now AT&T via The Switch (thanks Linda) has put in an SDI F/O link from our clients’s place in the heart of the city to the transmitter. When we get our stuff together we’ll have it moved to our studio.

So, the AT&T guy shows up and does our end, which is in our telco room right where the

Telco Room Patch to my TX

interconnect system the guys and I have been working  on is. All I have to do is put in a 12 foot cable from the F/O RX to the patch panel that goes to my room and then connect the TX room panel to my SDI monitor.

TX end of it

Much to my surprise it work, just kidding, Marty and Bill have done a great job. I thought it was appropriate that my station was the first to use this new interconnect system.

Now for this first test AT&T sent us color bars and when I punch it up I see that it’s 1080 / 50I. 50 frames, where are they getting this from, France? Well it worked just fine and the next day our client had a feed for us. But is was just black SD-SDI. Good thing the monitor displays the format. I switched it over to crosshatch so I could see the embedded audio in the horizontal blanking. I had them pull the feed a couple of times to be sure it was them. It was.

These new F/O receivers AT&T are using hold up to 4 RX but have no provision for audio, the tech says you can get it as an option.

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Little Fiber

February 7th, 2012

ZWP F/O from Commscope

We are nearly ready to start pulling the Fiber Optic cable around the tower building. Ours is an armored cable with 12 strands that will run from 18 points back to the Telco room. But Paul brought in a F/O cable that Astound was installing at his station, it to carries 12 strands and it has an aluminum jacket. The big deal about this cable is it’s bend radius. Our F/O cable has a bend radius of 18 inches, this one is 5 inches, that makes for a much easier install.

We opened up this new F/O cable to see it’s strands, we could see they where

Smaller fiber

much smaller/thinner than the one’s in the cable we are using. These are both Commscope cables the new one is their ZWP or Zereo Water Peak that has a smooth attenuation responce.

 

Comparing Fiber sizes

 

 

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Duals Don’t go into Singles

January 20th, 2012

One of our F/O Bays

So as you know we are wiring the heck out of the tower here, on aspect that is done is the fiber on the tower. We need to get a F/O tester but until then we were going to just put a loop back patch at each level and run light up and down to see that is all works. The only F/O cables we have are dual SC for doing the patching in the Telco room, so a took a few and ran up the tower and was all set to put a loop back at each level.

Then I ran into the problem, We have all duplex SC, the tower boxes all have single SC. You can’t get from her to there. I tried to just turn the dual but with the protective cap on the un-used one the other will not mate. So we’re stuck until we get some single SC cables.

 

 

 

 

 

 

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Station Panels

January 20th, 2012

Now that the wiring is complete in the Telco Room Bill and Marty have moved back upstairs to wire up all the station’s rooms. We have one floor done and are starting on the one below. After all that is in we will move on to the F/O. We had to make sure there was room as the F/O tray sticks out about 4″. Here are some shots of what they have done.

Link Panels, just the Cat5 and the A/V with RF on the right

Link F/O Tray on top with station's below then Cat5 and A/V

Rear view of Link Panels

Link Panel with F/O Tray below

 

 

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