Crestron Tech Support

  • Subscribe to our RSS feed.
  • Twitter
  • StumbleUpon
  • Reddit
  • Facebook
  • Digg
Showing posts with label Training. Show all posts
Showing posts with label Training. Show all posts

Thursday, 28 March 2013

Certifiable? Certified!

Posted on 07:12 by Unknown
One valuable service provided by Infocomm, the trade organization for the audiovisual industry, is a system of certifications for audiovisual professionals. Last week I passed a career milestone in earning my CTS-D (Certified Technical Specialist - Designer) certification. So what are these certifications, why do they matter and, most importantly, what do I do next?


Infocomm has two levels of certification. There's the basic CTS (certified technical specialist) and the two advanced ones for the installer (CTS-I) and designer (CTS-D) tracks. While there are some very talented people in the industry who remain uncertified and, truth be told, some decidedly less talented people with certifications, there is value in a set of standards for what an AV professional should know. Carrying a certification says that an individual took the time to gain certain core knowledge, spent the effort being tested on it, and made a commitment to keep their certification current through continuing education (Infocomm requires a number of "renewal units" to maintain their various certifications). It says that an organization has made an effort to train their workforce and make sure that training is recognized.  I've been lucky to work  for companies which put a high value on training and education, so have been able not only to acquire certifications but to maintain them through continuing education. For the uninitiated, what are the AV certifications? And where do I go from here now that I've climbed to the top of the AV certification ladder (OK, it was only two rungs. The AV Certification stepladder).

The CTS is a basic, entry-level certification. I've explained it as knowing how to speak the language of AV. A holder of a CTS should (amongst other things), know the difference between balanced and unbalanced audio, different kinds of video transport (composite, component, DVI, Displayport, etc), and the names and standard pin-outs of common connectors used in the AV industry. This is a great introduction to the world of AV, and denotes enough knowledge to be a competent helper-technician  or draftsperson at an AV firm (assuming some knowledge of drafting). A CTS by itself doesn't measure enough capability to run a jobsite as a lead technician, but does indicate that if someone asks you to terminate a mic cable you'd not have to ask what kind of wire (single pair 24 AWG), what kind of connector (XLR), and which pins go where (2 is plus, 3 is minus, 1 is shield).

At the next level - the top of the stepladder - are two choices. The Installer track is just what it sounds like - everything you need to be a lead tech. From cable terminations (including hands-on testing) to rack building to final testing and commissioning of a lead system. I've known several installers with CTS-I certifications. Those who've put in the effort to get that far are the kinds of technicians who can run a job site themselves. This isn't a certification I'd likely ever achieve; I've done my share of installation, testing, and commissioning, but it's never been my primary role and that's not likely to change. Now that I'm on the consulting side of the industry I'm even less likely to be "hands on" to the point where the installer certification is appropriate.

This brings us to the -D which I just earned. As you'd expect, the skillset leans towards design. There are things like projector brightness calculations, acceptable image size for different viewing tasks, lens throw calculations, amplifier power, and the dread PAG/NAG equations (the last of which, to be fair, the test actually gives you in a little pop-up window. There's a minimum of formula memorization required). There are also quite a few questions - enough that you'd not pass the test without them - on process. What goes into a program report. When submittals are sent and who has to approve them. The relationship between specifications and drawings. Overall workflow on a construction project. Some of this is as much project management as it is AV design, but that's OK. An AV Designer who doesn't know how or to whom to communicate plans for an AV system can't really be successful. We work with technology but, as is the case with all things, we ultimately have to work with people.

So now that I've achieved a career milestone, the obvious question is "what next"? There are, of course, plenty of answers to that question. I could follow up with my study of project management principles on the way to a PMP (Project Management Professional) from the Project Management Institute. The last time I was looking into project management study was several years ago when I didn't have the required amount of experience to qualify for the higher certification. Now I do, and a refresher on those skills is always valuable. I'll talk more about project management, perhaps, in a later post. This won't be my next stop, but is on the list. What is the next stop? One trend in AV is a blurring of lines between AV systems and network-based unified communications - especially in the corporate realm. This sometimes blurs the line between the AV and IT disciplines and many AV professionals - myself included - lack the depth of knowledge to intelligently weigh the benefits, drawbacks, and IT requirements for various communications systems which would be integrated with an AV project. With AV and IT converging, it's a good time for us all to learn at least a bit about eachother's space.



So, I'm now filling my head with things like the OSI model, network routing, private vs. public IP addresses, CISCO switch commands, and the like. It's genuinely fascinating to better see how data gets to where it's going once it leaves through that RJ45 jack in the back of your PC, and I'm looking forward to this part of the journey. There will, perhaps, be more of it in this space later. In any event, the technology field is much like the rest of life in that there's always something new to learn.

Thanks for sharing the journey with me.
Read More
Posted in AV, certification, Pixels, Training | No comments

Friday, 25 May 2012

Digital Media Certifcation

Posted on 04:07 by Unknown
For those who just joined us here  - or who have been here from the first but forgot - I'm currently on a journey from an AV Project Manager role to an AV Project Engineer role. De facto, I'm almost exclusively doing PE work, but before I get to change the  title on my business card I need to collect all of AVI-SPL's official requirements. Along the way, I'm picking up the skills and knowledge to better be able to handle the work.

This week I finished another step - Crestron's three-day Digital Media Certified Engineer training class.This was sometimes interesting, sometimes humbling, and an excellent addition to my AV education.
Digital Media was introduced seven years ago (it doesn't seem like that long!) when digital video was still primarily associated with consumer applications. The idea was that you could take various video formats (S-Video, VGA, composite video, HDMI), convert them to a digital signal and send them over a single cable to your display. The original solution (which we now call "DM Copper" to distinguish from newer versions) included transmitters at source locations, switches, and receivers at the destination. All of these were connected with Crestron's proprietary Digital Media cable. This cable,  about the diameter of a garden hose, contains three individually jacketed cables - an 8 conductor UTP which looks just like a Cat5, an 8 conductor STP (this carries everything but audio and video) with a rigid spline down the center to separate the pairs (this carries audio and video), and a 4-conductor control cable for communication and power of the transmitters and receivers. Since then, they've added "DM 8G" which uses a single shielded twisted pair (regular Cat5e or 6 works), as well as multimode fiber solutions. It's an important technology to be comfortable with, as Crestron has recently sold their 50,000th DM switch, and shows no signs of slowing down.

What was the DMC-E class like? It's a combination of Creston's other two DM classes - DMC-D (Designer) and DMC-T (Technician). The goal was that, at the end of three days, I'd be able to lay out a DM system, put it together (including cable terminations), test and commission it. It was quite a bit to pack in to three days!


We started with the "D" part, reviewing the alphabet soup that goes with digital video - HDMI, HDCP, EDID, CEC, TMDS, and even a brief mention of SDI. It's all stuff that I mostly have by now, but did add a couple of details about, for example, exactly how CEC works and how we could use it in the unlikely case that we found a reason to do so. For those who don't know, CEC is an absurdly slow control protocol embedded in HDMI video. The idea is that any bit of equipment can trade control signals with any other. So, if you turn on your Sony Blu-ray player, it can automatically switch on your Panasonic TV and flip it to the right input. The problem is that many manufacturers don't want to make it too easy to use competitors' gear, so they use their own proprietary codes as part of the "extended" command set. In the commercial world, of course, we just turn these things off.

Day 1 ended with a fairly detailed review of the capabilities and limitations (most frustrating limitation - that DM systems only support USB 1.0, while many interactive touchscreens require USB 2.x. There seem to be no plans to improve upon this) available digital media hardware, some applications exercises, and a test. This was a fairly easy day for me, and relatively fun.
Day 2 covered the "T" part of the certification. This was, for me, the humbling part. In my project manager role, I'd become often handed a drawing set to a team of technicians and taken for granted that they'd fly through it, quickly and accurately terminating and connecting all manner of cables. While I can put together a standard or even shielded RJ45 connector if given enough time, the multi part DM connectors quite honestly gave me fits. I'd not wrap enough braid around the inner jacket and leave the cable loose. Or leave the conductors too long so the strain relief didn't grip the outer jacket. Or just plain wear out the little teeth inside the connector from having to open and close it too many times after putting one pair in backwards. I'm sure that if I did this kind of work every day I'd get better at it. I also know that after a half day of working on one connector, I discovered new respect for the people who do it everyday and can even manage more than one termination per hour. Frustration notwithstanding, I did manage to head home at the end of Day 2 leaving working DM Copper and 8G cables behind.

We also got to try our hands at a fiber terminations, which was half safety lesson and half actual work. Fiber safety is pretty simple; it's made of glass. You don't want to eat glass, you don't want glass in your eyes, and you don't want glass splinters. So wear goggles, don't eat where you're working on fiber, and if you break a piece off clean it up and throw it away. Putting the connector on a fiber-optic cable is a step-by-step process that feels as if it should be happening in a laboratory. Mark it with the measuring card, strip the outer jacket, strip the inner jacket, wipe clean, cleave with the cleaving tool, realize that you forgot to put the little boot over the cable, swear at yourself while you try to carefully slide it past the now naked fiber without breaking it, slip the end into the connector, screw it together.

Day 3 was the putting it together and testing day - back to my comfort zone. We hooked up all those cables we made to a DM switcher, transmitters, receivers, controller, and a couple of monitors and then got to play with it. I must confess that it did take some of the sting out of the ours toiling over connectors to get to hook them up and see them work.  The theory is fine, but there really is nothing to compare with actually logging into a system and seeing just what you can make it do to confirm that you actually have learned something.
At the end of the day we took a test, showed the instructor that we got our system to work, and got our official certificates. And that is our technology post for this week. Tune in next week for the penultimate installment of the blog-hopping "Riley's Story" .
Read More
Posted in Digital Media, Pixels, Training | No comments
Older Posts Home
Subscribe to: Posts (Atom)

Popular Posts

  • An afternoon visit with Extron
    I've not talked about Extron here recently since my visit to Anaheim for their training school nearly two years ago. Since then, two Inf...
  • SONOS INTRODUCES THE PLAY:3
    SONOS INTRODUCES THE PLAY:3 Sonos has just introduced the SONOS PLAY:3, the compact, all-in-one Sonos player with wall-to-wall HiFi sound. U...
  • What are the benefits of AV?
    The benefits of AV, as cited by customers, are more universally shared on both sides of the Atlantic. These include the ability to provide b...
  • My my, what a big screen you have!
    We've all seen them. Conference rooms the size of a walk-in closet in which the client wants (and the salesperson sold) a display the ap...
  • In Praise of Brevity
    And now for something completely different. For those of you who found this blog through my thoughts on digital video matrix switchers, fear...
  • Final thoughts on Copyright, SOPA, and this week; protests
    My thoughts on copyright, plus, read through to the end for this week's dose of fiction. By now this weeks' fight - at least most of...
  • Do Crestron have any hardware?
    CRESTRON HARDWARE Unlike other automation hardware, Crestron has a wide range of products extending past touch panel interfaces. Their line...
  • Nightmare Fuel, Day the 21st: The Painting
    Day the 21st. I'm still one behind my usual one-behind schedule, but will either catch up or fall farther behind with a couple days of u...
  • Farewell Umi. We hardly knew you!
    Picture phones have been with us for a long time, at least in our dreams. We can go back 50 years: “...in fact, men will no longer commute. ...
  • Playtime - The World is Not as it Appears!
    I attacked a post office this morning. Before you call the FBI and I end up on a government watch list, I should explain. You see, it was re...

Categories

  • A
  • A to Z
  • ADA
  • AMX
  • arsitek
  • automation
  • AV
  • AVB
  • Baseball
  • Blog
  • Blog Hop
  • Blog Tour
  • Book Review
  • Books
  • BSFW
  • Carousel
  • certification
  • Clear One
  • commute
  • Constraints
  • consulting
  • coursera
  • crestron
  • D
  • design
  • Digital Media
  • Disney
  • E
  • Enova
  • Extron
  • F
  • feminism
  • fiction
  • flash
  • flash fiction
  • Friday Flash
  • G
  • Gaming
  • gender
  • Glamour in Glass
  • green AV
  • Guest Post
  • H
  • HDBaseT
  • Hearing
  • home
  • I
  • Infocomm
  • Infocomm 2013
  • Infocomm13
  • Ingress
  • Ink
  • integrasi
  • integration
  • J
  • K
  • Knowledge
  • Long Island City
  • luxury
  • M
  • May I?
  • Mets
  • Mic
  • Mobile
  • ModPo
  • N
  • Naomi's Story
  • Nightmare Fuel
  • O
  • Parenting
  • Passover
  • Pixels
  • Poetry
  • politics
  • Q
  • Quality
  • R
  • RA Dickey
  • Reading
  • review
  • reviews
  • Riley
  • Riley's Story
  • S
  • savant
  • school
  • SOPA
  • Sophie Duncan
  • storytelling
  • summer
  • SVSI
  • switchers
  • T
  • technology
  • tragedy
  • Training
  • TV
  • U
  • V
  • Video blogging
  • W
  • women in av
  • Work
  • Writing
  • X
  • XLR
  • XTP
  • Y
  • Yarnmen
  • year end
  • Z

Blog Archive

  • ▼  2013 (51)
    • ▼  November (1)
      • HDBaseT Interoperability Follies
    • ►  October (29)
    • ►  September (1)
    • ►  August (1)
    • ►  July (1)
    • ►  June (5)
    • ►  May (3)
    • ►  April (4)
    • ►  March (5)
    • ►  February (1)
  • ►  2012 (63)
    • ►  December (4)
    • ►  November (1)
    • ►  October (3)
    • ►  September (4)
    • ►  August (4)
    • ►  July (4)
    • ►  June (2)
    • ►  May (10)
    • ►  April (25)
    • ►  March (1)
    • ►  January (5)
  • ►  2011 (9)
    • ►  July (4)
    • ►  April (1)
    • ►  March (3)
    • ►  February (1)
  • ►  2010 (6)
    • ►  October (1)
    • ►  June (2)
    • ►  May (1)
    • ►  March (1)
    • ►  February (1)
  • ►  2007 (8)
    • ►  November (3)
    • ►  October (5)
Powered by Blogger.

About Me

Unknown
View my complete profile