48 Replies Latest reply on Apr 19, 2012 1:09 AM by Colin Barnard

    All Testing passed


      See   http://www.raspberrypi.org/  to see the good news

        • Re: All Testing passed

          Ahhh at last. "3 steps to heaven" 2 steps to go. Get em made and get em shipped.

          • Re: All Testing passed

            way out in the Ozone here... how do I find out when (if) my order will be filled?

            • Re: All Testing passed
              Drew Fustini

              The test chamber reminds me of the holodeck - very interesting to see:







              • Re: All Testing passed

                I must applaud the inclusion of the multiple certifications for Europe and North America.  At least this will alleviate any possible delays based on testing.


                I am curious as to what the "Canadian thing" was that had to be tested?

                  • Re: All Testing passed


                    I'm not as confident as you seem to be that the testing done so far will

                    "alleviate any possible delays based on testing".


                    The FCC rules, Title 47, section 15.3 "Definitions", paragraph i, say:

                    "Class B digital device.   A digital device that is marketed for use in a

                    residential environment, notwithstanding use in commercial, business

                    and industrial environments.  Examples of such devices include, but

                    are not limited to, personal computers, calculators, and similar

                    electronic devices that are marketed for use by the general public."


                    But apparently, Class B testing has not been done, even though the

                    RPi is being marketed as a PC for use in residential environments.


                    There is another section, 15.32 "Test procedures for CPU boards

                    and computer power supplies",  but it doesn't seem to have been

                    followed, from what we know.  It refers to testing within an enclosure

                    with the cover removed.

                        • Re: All Testing passed

                          Thanks for that most useful link. Great news hopefully.


                          I am sure looking forward to tasting my RaspberryPi

                          • Re: All Testing passed


                              good find!

                            There are some odd things in that press release.


                            The first paragraph mentions that it is designed for children and IT enthusiasts

                            to develop programming skills, but the second paragraph mentions "industrial or

                            office environments".   It seems unlikely to find either children or IT enthusiast

                            programming skill developers exclusively in industrial or office environments.


                            The second paragraph mentions a warning statement to ensure that customers

                            are fully aware that equipment used in a residential environment may be susceptible

                            to radio interference.   I think the primary concern in residential environments is not

                            susceptibility of the equipment, but interference caused by the equipment,

                            which is not mentioned.


                            This susceptibility warning seems to imply that it's OK to market to residential

                            users with only a Class A certification, provided that a disclaimer is provided. 

                            I'm not sure about the EC rules, but the FCC rules apparently don't allow this.

                            FCC OET Bulletin 62 (1993), which was pointed out to me on another thread,

                            says, bottom of page 8:


                            "If a digital device is sold or offered for sale to *any* (empasis in original) residential

                            users (including commercial or industrial companies that could employ the equipment

                            in a residential environment) then it is a Class B digital device regardless of its price

                            or application.  Marketing through a general retail outlet or by mail order to the general

                            public with a simple disclaimer, such as "For Business Use Only," is not sufficient to

                            qualify for Class A."


                            Page 9 also says: "Portable computers, because they are designed to be used anywhere,

                            are considered Class B devices regardless of their price or restrictions placed on marketing."


                            The second paragraph of the press release mentions that the boards were tested to comply

                            with directive EN500081-2 (1993).  But that is an emissions standard, not a susceptibility

                            standard.  We were told that susceptibility to cats was tested, were we not?  Hopefully the

                            boards were also tested to a more recent emissions standard than 1993.

                              • Re: All Testing passed

                                Liz made a reply to comment on the "Testing Completed" R-Pi blog as shown below:

                                liz on April 10, 2012 at 10:25 pm said:     

                                "Quite – a week in the testing chamber is *very* speedy, and we were only ever aiming for Class A; RS and Farnell were very clear that the board only has to be certified that far before the educational release. There’s been no “revision to easier limits”, I’m happy to say."


                                I'm not a compliance specialist so I don't know all the FCC Part 15 implications.  It would be sad if the first run of boards was only available outside the US. 


                                On the same page, Liz also made this comment:

                                liz on April 10, 2012 at 7:04 pm said:      "Happily, we’ve found it doesn’t need a shielded enclosure to reach Class B, although it will require a (very minimal) redesign."


                                Now I don't know if she's referring to CE "Class B" and/or FCC "Class B" but perhaps a redesigned consumer/residential use version will be available relatively soon*, anyway.


                                * well, what's a few more months, at this point?

                                  • Re: All Testing passed

                                    "and we were only ever going for Class A"   oh really??

                                    what good is class A for a device designed for children

                                    to use at home with a TV?


                                    The 28 March front-page story "An update on CE compliance" says:

                                    "On the basis of preliminary measurements,  we expect emissions

                                    from the uncased product to meet category A requirements comfortably

                                    without modification, and possibly to meet the more stringent Category B

                                    requirements which we had originally expected would require a

                                    metalised case."


                                    That sounds to me like they were in fact hoping to meet Category B,

                                    with Category A as a fallback position.

                                  • Re: All Testing passed

                                    As I understood it, the initial release was to be to allow enthusiasts to develop software and accessories that would be useful to the educational world when the full release takes place in September.


                                    Ironically, Schools are the same as offices and only need to be class A.  While enthusiasts developing software and hardware may wekk be doing so in the home, they should be suitably equipped to resolve any interference issues themselves (i.e. mobve the radio away from the workbench).


                                    Someone mentioned the ESD packaging earlier, this is likely to be one reason Class B needs a case - it was testeed with one ESD test, but direct contact to pins is another matter


                                    It would be nice to see the results for ourselves, to see how close it was to Class B in each area.

                                      • Re: All Testing passed


                                           I think the purpose of residential Class B requirements is not so much to prevent

                                        interference within one residence, (that is easily resolved as you say), but to

                                        prevent interference with a neighbor who may have no idea which direction

                                        the interference is coming from.  So even enthusiasts may be ill prepared to

                                        resolve such issues.

                                          • Re: All Testing passed

                                            Probably all that you need to do if you are getting complaints, is to clamp some ferrite clamps on the cables connected to the R-PI. Without these "antenna's" it's very unlikely such a small board will still radiate.

                                              • Re: All Testing passed


                                                  From the pictures, it looks like the guys in the test chamber did in fact use some ferrite clamps,

                                                but apparently it still didn't meet Class B requirements.  Awaiting details.


                                                Anyway, the FCC rules are designed to prevent a device from being used in a residence

                                                without Class B certification.  As opposed to preventing unsophisticated users from using

                                                such a device.  The intent of the rules is to avoid having to ask your neighbors to add clamps

                                                to whatever devices they may be using that could be causing interference.

                                                  • Re: All Testing passed

                                                    Using ferrite clamps during testing is a common way to indentify which of the cables is radiating. It says absolutely nothing about whether the device passes any tests with or without these clamps. Using them is simply a testing tool.

                                                      • Re: All Testing passed



                                                        Quite  a lot of devices are shipped with ferrite lumps of different sorts on the cables (I've hade a Cannon camera with one on the USB lead and a network switch with one on the power cable as well as being invloved in product developments where the ferrites were on the cable but inside the box). It's an expensive solution but may the best bet if the cost of a re-design is significant. Of course the device is no longer compliant if a different cable is used and the documentation should reflect this.


                                                        Michael Kellett

                                          • Re: All Testing passed

                                            Just picking up on one point from one of the above posts, I do not believe that ".... the RPi is being marketed as a PC for use in residential environments."


                                            Although the bare board uncased 'version', which is currently the only one available, is being ordered by 'home users', I would not say that it is being marketed or advertised as being particularly suitable (yet) for that particular section of the market.


                                            We must remember also that the compliance testing was carried out under carefully regulated conditions by people who are experts in their fields.


                                            It is a shame that some posters on here (and one in particular) seem to have nothing better to do than to continually criticise the foundation, and to try and pick holes in, and to undermine the excellent work they are doing.

                                            Do I detect the presence of a troll perhaps?

                                              • Re: All Testing passed


                                                  You are trying to make a distinction between "being ordered by home users" and "being marketed

                                                to home users".  But the FCC rules define "marketing" as selling or offering to sell, so I don't think

                                                this is a valid distinction.  Anyway, the RPi promotional videos, such as Quake3 and XBMC are

                                                clearly aimed at home users rather than industrial. 


                                                If there are any home users, the device is considered Class B.  It doesn't need to be the majority

                                                or anything like that, although in the case of RPi, I have no doubt that home users will in fact be

                                                the majority.


                                                You say that compliance testing was carried out by experts, and no doubt that is true.

                                                I look forward to hearing how they justify Class A testing for the RPi.


                                                For details on the FCC rules, see Bulletin 62 here: http://transition.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet62/oet62rev.pdf

                                                  • Re: All Testing passed
                                                    Roger Wolff

                                                    I just scanned the document mentioned, and it lists as exempt: things like digital watches that use less than 6 nanowatts. I find that 6 nanowatts very very little. I measured my 1980ies watch once, and got about 0.3 micro amperes. So about 450 nW. I'm pretty sure that that watch is pretty harmless at that powerlevel even if it would TRY to interfere with radio communications.

                                                      • Re: All Testing passed

                                                        The Foundation certainly promoted the board as an effective media computer, running XBMC and OpenELEC very nicely.  They even had prominent articles about that on their blog, and they also showed it hosting  normal Linux desktop distros and have many times said "It's just standard Linux".  This ensured that the board would attract interest from ordinary consumers worldwide, and hence end up going into normal domestic consumer situations worldwide too, not just into the hands of electrical engineers and radio amateurs who know how to deal with EMC problems.


                                                        There can't be the slightest doubt that this was intentional.  They didn't try to restrict the audience for batch #1 to techies only, quite the opposite, so feeling aggrieved when the need for full domestic certification was explained to them was fairly comical.  They ensured that it would have to be so by their promotion.

                                                          • Re: All Testing passed
                                                            Roger Wolff

                                                            Morgaine Dinova wrote:

                                                            This ensured that the board would attract interest from ordinary consumers worldwide, a....


                                                            There can't be the slightest doubt that this was intentional.  They didn't try to restrict the audience for batch #1 to techies only, quite the opposite, so feeling aggrieved when the need for full domestic certification was explained to them was fairly comical.  They ensured that it would have to be so by their promotion.

                                                            Well, I think I tend to believe them that they thought the first batch would not attract end-users. They thought (timeframe: sept 2011) that the software wouldn't be ready and that most people would not want to sink their money in a $35 paperweight until the software would be ready.


                                                            In fact, people ARE willing to invest in a nifty paperweight if it probably will be able to work as a computer later on. People ARE willing to bet that it will do what they want within reasonable timeframe. People ARE willing to do this because it only costs $35+shipping+tax.


                                                            Let me ask you this way: I have a product here. It'll be useful about half a year from now when we have the software ready. Do you want to buy it now? I expect 95 out of 100 people to sya: no. That's what they expected. In the meanwhile work on the software continued and they showed off their progress on the software front. Fine.


                                                            So, due to the software already on its way, due to some demos showing impressive stuff many people have changed their minds and ordered the devices now already. That changes the game a bit.

                                                              • Re: All Testing passed

                                                                By selecting two of the world's largest electronic component distributors to work with them, the Raspberry Pi Foundation have done all they can to target Techies with the first batch.  Had they teamed up with Amazon, whou would, arguably, have been better equipped to handle the volumes of orders and interest, one could, quite reasonably have assumed that they were targetting end-users.


                                                                Each of the software demonstrations has been an early version, far from ready for end-users - much like the demonstrations of Windows 8 last year.  You could not claim that the Windows 8 developer tablets given away were for end-users, likewise, it is quite reasonable to consider the iniital release a techie-only prodict.


                                                                I can go to B&Q and buy a gas boiler, but it would be illegal for me to fit it myself.

                                                                  • Re: All Testing passed


                                                                      Do you have any evidence that Windows 8 developer tablets were not certified for home use?

                                                                    The FCC rules consider portable computers to be Class B devices.


                                                                    There are two issues here that I think are getting confused. 

                                                                    The foundation hoped to use a "developer board" exemption to the CE rules,

                                                                    but that was denied by BIS. 


                                                                    The FCC rules don't distinguish techie from non-techie end user,

                                                                    they distinguish home use from exclusively industrial.  Even a techie home user

                                                                    is considered by the FCC to be a home user subject to Class B

                                                                      • Re: All Testing passed

                                                                        Since software and firmware can have a critical effect on the EMC of a device and the O/S was in beta. I suspect that the combination shipped quite possibly had not been tested.


                                                                        Luckily I am in the EU so the FCC rules do not affect me.  If it must be Class B certified to ship in the USA, hard luck to all the US enthusiasts, you will just have to wait for Revision 2 and I'll get my Raspberry PI sooner.  IIRC one of the goals of the project was to boost programmign and electronic skills amongst UK students.  If other juristictions want to give the UK a head start so be it!


                                                                        As for the popularity on launch, I think you will find that at least one message board targetting consumers had messages posted by third parties about the new $25 computer, encouraging users to "Order Yours Today" as if it were a limited offer - hardly something the Raspberry Pi Organisation wanted and probably the underlying reason why BIS advised that CE marking was reqiuired.  Incidentally, BIS have no authority to interpret the regulations in conjunction with the facts to determine absolutely whether CE Marking is indeed essential for the first batch.  Only the courts have such authority.

                                                                    • Re: All Testing passed


                                                                      You wrote: "Well, I think I tend to believe them that they thought the first batch would not attract end-users."

                                                                      You may believe them, but BIS has said this is a consumer device, not a development board,

                                                                      and must be tested accordingly.

                                                                    • Re: All Testing passed
                                                                      Roger Wolff

                                                                      Hey. If you don't read the replies / arguments, feel free to shut up instead of just repeating your previous post.

                                                                        • Re: All Testing passed

                                                                          @Roger: Please try to maintain a civil tongue here.  This isn't the Rpi blog and forum where only comments that praise the Foundation are permitted.  We discuss things as they are here, and what I described is EXACTLY what the Foundation did, it's not hidden, and it's not opinion, it was open for all to see.  They can only blame themselves for a level and breadth of interest that made the BIS declare the exemption for development boards inapplicable to Raspberry Pi.


                                                                          And it went even beyond what I described.  They made sure that Raspberry Pi was in all the common media, not just in technical outlets, riding the wave of the BBC micro and at every opportunity stating their plan to save UK education, which caused extremely widespread interest.  They knew exactly what they were doing, so to profess surprise at the need for certification of a mere handful of development boards --- oh wait, it was 10 THOUSAND --- stretches incredulity to breaking point.

                                                              • Re: All Testing passed
                                                                Roger Wolff

                                                                Kevin Foss wrote:

                                                                I am curious as to what the "Canadian thing" was that had to be tested?

                                                                It's the Canadian equivalent of the FCC and CE marks. Someone forgot what it was called while typing a blog post or something and from there on in the "raspberry pi community" this phrase has stuck. Consider it an inside joke if you will.

                                                                • Re: All Testing passed


                                                                    The Canadian EMC standard is ICES-003.

                                                                  Apparently it's very similar to the FCC requirements.

                                                                • Re: All Testing passed

                                                                  I think it's great that the Pi has passed the compliance testing but what now?

                                                                  To say that it has passed all testing and then nothing else for a week is like leading a blindfolded person and shouting out landmarks when the person does not know the the final destination. It really doesn't do much good....

                                                                  Is there any news as to the immediate plans on order fulfilment?

                                                                    • Re: All Testing passed



                                                                      Unless there is some BIG issue surely RaspberryPi Org and Farnell and RS can come up with some kind of joint statement about where we are and where are going. Very disappointed last couple of weeks.

                                                                        • Re: All Testing passed

                                                                          just after I posted the above I saw this!  http://www.raspberrypi.org/


                                                                          Maybe some good news at last. Hope so.

                                                                            • Re: All Testing passed

                                                                              Yes...I saw the post by Liz as well but it would still be nice to hear something official from Farnell or RS. Afterall, we have been hearing all kinds of things from the foundation for months that hasn't exactly panned out as they intended.

                                                                                • Re: All Testing passed

                                                                                  It's all a bit academic when this first lot will go on sale, as it's only 2,000 units that have arrived in the UK so it's a drop in the ocean.  Nothing is known about the other 8,000 of the first batch.  Presumably they're still in the factory having their RJ45 fault repaired by hand, as otherwise the Foundation would likely have announced that they've been shipped as they did with the first 2,000.


                                                                                  And while the first 10,000 has symbolic significance, that too is just a drop in the ocean compared to demand, so it's puzzling why date of first delivery is causing so much agitation --- it's not really of much interest to the vast majority, other than as a source of disappointment.


                                                                                  A far more interesting question is when boards will actually first appear in open stock rather than satisfying preorders.



                                                                                    • Re: All Testing passed

                                                                                      I agree, that's why I was curious about their plans for order fulfilment rather that when they were shipping any of the first 2000 (or 8000 for that matter). I mean if I understand correctly after the first 10,000 units, the boards won't even be manufactured at the same facility. Farnell and RS are supposed to be taking over the manufacturing, I haven't heard anything about the progress of this. I would imagine that if they have the manufacturing facilities that I am led to believe then they could start supplying a fairly large number of these in rather short order.

                                                                                        • Re: All Testing passed

                                                                                          I sure hope so, as this whole saga has been ridiculous.  We want to be working with the units, not talking about their delivery or lack thereof.  I wish we had board schematics at least, which would help to focus attention in a more technical direction.

                                                                              • Re: All Testing passed

                                                                                Good to see this.  Maybe now I can get me hands on one now.

                                                                                • Re: All Testing passed

                                                                                  any news on an Australian Element 14 release schedule?