from:"Cortland Richmond"


On 2/27/2017 7:53 PM, Brent DeWitt wrote:

I think Ken's rational makes sense to me, since the 51.5 is derived from 
20*log(377).



Sure, but now we're back to how close we are -- wavelengths -- to the emitter. 
20*log(??)

Low frequencies can be tricky,  and I once had to double-check a test 
lab (not yours) results at a vendor, dragging the EUT out to their 
parking lot then wheeling a cart with a 6510 loop antenna, battery, AOR 
AR5000 receiver and RMS voltmeter [all mine] away to see  how fast the 
signal dropped with distance compared to 3m.


A fun time was NOT had, but I probably came across as a mad scientist. 
Again. At least no one ran out of a chamber...



Cortland Richmond KA5S

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Re: [PSES] CORRECTION (wrong page) Passive Loop Emissions [General Use]


On 2/27/2017 12:23 PM, John McAuley wrote:

The difference between dB(pT) and dB(µA/m) is 2 dB.

dB(pT) -2 = dB(µA/m)




His customer wants dB s/m, which is not printable with the TE software.  

From the EMCO manual:





/

/Cortland Richmond/
/


.

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Re: [PSES] CORRECTION (wrong page) Passive Loop Emissions [General Use]


On 2/27/2017 12:23 PM, John Macaulay wrote:

The difference between dB(pT) and dB(µA/m) is 2 dB.

dB(pT) -2 = dB(µA/m)


This is


true only in the Far Field.

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Re: [PSES] CORRECTION (wrong page) Passive Loop Emissions [General Use]


On 2/27/2017 7:15 AM, Price, Andrew (Leonardo, UK) wrote:

The customer has requested an extended magnetic field emission test over the 
range 100kHz to 2MHz with a limit defined in dBpT.
The antenna to be used is an EMCO 6512 which has it correction factors provided 
in dBS/m which the emission software used does not recognise.


On 2/27/2017 7:15 AM, Price, Andrew (Leonardo, UK) wrote:

... customer has requested an extended magnetic field emission test 
over the range 100kHz to 2MHz with a limit defined in dBpT.
The antenna to be used is an EMCO 6512 which has it correction factors 
provided in dBS/m which the emission software used does not recognise.
So is there a conversion factor that enables the right correction 
factor to be entered or is the conversion factor only used once a 
result is obtained??


What Ed Price said. Take a look at 
http://www.ets-lindgren.com/manuals/6512.pdf page 31 for the  6512 and 
page 33 for the equation.   Send along a copy of the correction factors 
from your antenna's chart with the difference between the two curves and 
an explanation that the software apparently does not accommodate other 
units)



Cortland Richmond

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Re: [PSES] Passive Loop Emissions [General Use]


On 2/27/2017 7:15 AM, Price, Andrew (Leonardo, UK) wrote:

... customer has requested an extended magnetic field emission test over the 
range 100kHz to 2MHz with a limit defined in dBpT.
The antenna to be used is an EMCO 6512 which has it correction factors provided 
in dBS/m which the emission software used does not recognise.
So is there a conversion factor that enables the right correction factor to be 
entered or is the conversion factor only used once a result is obtained??


What Ed Price said. Take a look at 
http://www.ets-lindgren.com/manuals/6512.pdf page 30 for the  6512 and 
page 33 for the equation.   Send along a copy of the correction factors 
from your antenna's chart with the difference between the two curves and 
an explanation that the software apparently does not accommodate other 
units)



Cortland Richmond

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Re: [PSES] lowest emissions 4k TV?

2017-01-13 Thread Cortland Richmond


On 1/13/2017 2:21 PM, Ken Javor wrote:

Why would one feel, philosophically, that it is required had to meet a limit
with a noisy peripheral? You are not responsible for the peripheral's noise
contribution, right?


One couldn't, and for the monitors, THIS one didn't have to; we didn't 
buy them.  But the printer was radiating noise generated in our 
computer. I fixed THAT.


If my printer drivers are putting RF into a printer chassis, *that 
vendor* has no duty to shield them -- and my employer will rightly be 
fined for non-compliance.


The only way to be sure of compliance is to test with peripherals that 
will make it obvious. QED; buy the least well-shielded peripherals that 
still pass on their own merits.


You may remember the cable ferrite beads discussions with the FCC...

Some time around 1988, my brother's  high resolution monitor was 
interfering with TV reception in four adjoining apartments, which I was 
able to fix by putting a 360-degree terminated shield over the cr*ppy 
video cable a local store was selling. And it was at Tandy, maybe in 
1992,  that I discovered a TV-tuner card  could make our system fail RE 
when it was just passing computer video; they had poor shield 
terminations on their external video jumper.


Guess what? There's a discussion going on now about poorly 
shielded/terminated HDMI cables ... the more things change, the more 
they stay the same.



Cortland Richmond

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Re: [PSES] lowest emissions 4k TV?

2017-01-13 Thread Cortland Richmond


On 1/12/2017 10:26 PM, Ken Javor wrote:

If I am qualifying a device that connects through a cable to this TV, but not 
the TV itself, why would it physically have to be part of the set-up in the 
test chamber? Why could it not simply be support equipment in an adjacent 
chamber, providing the proper interface at the end of the cable?


When, once upon a time, firms did their own pre-FCC-test testing, we 
followed the FCC Part 15 rule of connecting a peripheral of each type 
for which a port was provided (AND maximizing emissions with cable 
placement).


More than once, I found CRT monitors that would cause the EUT to fail* 
because the modulated cathode current supporting the "bold H" pattern 
was returned over too large a  loop.


Once in a while, we found printers radiating signals that came from the 
computer.


I got suggestions we test with a better printer...

It we were "righteous" about testing we would have had to select the 
very worst among peripherals, but all of us remember list mail asking 
for suggestions of "good" peripherals to test with.


Is[n't] it good we don't have to do that now?

*I once demonstrated how to make an computer "fail" CE *while turned 
off* with "bold H's" on a certain make of monitor nearby.  Management 
was not amused.



Cortland Richmond

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Re: [PSES] Non-grounded electrical outlets

2017-01-01 Thread Cortland Richmond

On 1/1/2017 1:14 PM, Mike Sherman - Original Message - wrote:
I have knob and tube left on, I think, one circuit in my 99 year old
house. It's on my list to be replaced soon. It has some impressive
soldered splices, but charm has its limits. I agree that it's a bear
to unearth and replace.

My experience with the insulation is that it is now brittle. Replacing
a receptacle, for example, causes the insulation to fracture, in turn
causing me to encase it in shrink tube.

Many structures cannot be repaired or renovated without substantial
upgrades to meet modern codes and standards.

At one time, my son and I lived in a home built in 1838. The electrical
outlets had four prongs; two horizontal ones on the outside edge and two
vertical ones – conventionally 110 V – centered inside them.

That old.

http://www.philadelphia-electricians-how-to.com/2011/08/antique-tandem-and-parallel-receptacle.html

One day I was changing a light bulb in the hallway when the fixture
swiveled, twisting the insulation on the wiring, which crumbled and
wrapped around itself, shorting the wiring to the fixture.

Considering how old and dry the wood was, and how little time I had left
to react, I jumped in the air to avoid a fixture to ground shock, and
ripped the whole thing out of the ceiling.

I replaced the fixture and wiring to the nearest nearest junction with
newer – and advised the landlord. Recent aerial pictures of the
neighborhood show evidence of substantial remodeling of the old dwelling.

Cortland Richmond

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Re: [PSES] Practical ethics? -- text version

2016-12-28 Thread Cortland Richmond


On 12/26/2016 11:39 PM, John Woodgate wrote:

With best wishes DESIGN IT IN!


This is applicable as much to corporate culture and structure as it is 
to end products; it will not happen without changes in how organizations 
think.


From one of my further Quora comments:

//

/Given our corporate culture — government too, if you look at the Flint 
MI water problem — making quality and safety a profitable activity (or 
at least avoiding much higher expenses later in the product cycle) seems 
to me the best way to get organizations to “do the right thing.” 
Enforcement after the fact isn’t a preventive measure, and invites 
attempts at hiding problems that should and could have been solved. 
Repercussions are feared; kudos are[sic] welcomed. Which do you think 
works better?/


/

Unfortunately, this is seen as challenging executive privilege and 
organizational fiefs across whose boundaries changes would have to be made.


...  Called back on contract at the firm I retired from, I identified a 
problem as not technical, but STRUCTURAL (the _fix_ was technical) — and 
my old boss didn’t disagree.


He couldn’t change it. You don’t need more cops — but missionaries might 
work.


/:

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Re: [PSES] Practical ethics? -- text version


On 12/27/2016 5:29 PM, Ken Javor wrote:
has generated more bad experiences 


ADS-37A's rather high pulsed RS levels  was a result, if i remember 
correctly, of Army helicopters being  banned from US Navy aircraft carriers.



Cortland Richmond

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Re: [PSES] Practical ethics? -- text version


On 12/27/2016 5:16 PM, john Allen wrote:

Don't think you can attach jpegs


Found that out. It took three tries, but I UL'd an image to Flickr. The 
whole document is available on the Web (link included) but that one 
chart is all I needed.



Cheers,


Cortland Richmond

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Re: [PSES] Practical ethics? -- text version


On 12/27/2016 4:38 PM, John Woodgate wrote:


I guess that the US Army tries to cover all the angles, but that leads 
to other problems.


Such as the ADS-37A RS test. I never did find a civilian lab that could 
do it all and one who said they could was inverting the RMS to peak 
conversion by pulse modulating at the RMS level.


See 
https://www.flickr.com/photos/101461001@N06/31081188414/in/datetaken-public/

source: http://everyspec.com/ARMY/ADS-Aero-Design-Std/ADS-37A-PRF_2455/

Cortland Richmond

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Re: [PSES] Practical ethics? -- text version


Whoops; here's the ADS37A chart in jpg:

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Re: [PSES] Practical ethics? -- text version


On 12/27/2016 4:38 PM, John Woodgate wrote:


I guess that the US Army tries to cover all the angles, but that leads 
to other problems.


ADS-37A is a problem all by itself.  I never did find a civilian test 
lab that could do the RS test.   One that SAID they could had inverted 
the Peak to RMS equation...


FREQUENCY (MHz) 

PW

(u SEC)



PRF
_(Hz) _



PEAK FIELD (V/mRMS)



AVERAGE

FIELD (V/mRMS)



SAMPLE FREQUENCIES

2-24.9



833.3



300



204



102



24

150-249.0



20.0-25.0



200-310



3120



200



4

250- 499.9



25.0-33.0



300



2830



200



6

500-999.9



33.0



100-300



3480



244



3

1000-1999.9



1.0-2.0



670-1000



8420



200



1

2000-3999.9



1.0



250-600



21270



336



3

4000-7999.9



1.0-2.0



250



21270



336



1

8000-.9



1.0



150-250



21270



336



2

10,000-40,000



1.0



1000



6892



200



6



Cortland Richmond

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Re: [PSES] Practical ethics? -- text version


On 12/27/2016 2:19 PM, Ken Javor wrote:

I see what Cortland describes as a
fundamental feature of how businesses are run today in the USA


See http://forums.delphiforums.com/callahan/messages/?msg=23312.1

Hah!


Cortland Richmond

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Re: [PSES] Practical ethics? -- text version


On 12/27/2016 10:39 AM, John Allen wrote:
in the wider context, this sort of thing can place a great strain on 
the ethics of the “guy in the middle” who understands what actually 
needs to be done and “speaks his mind”,


Here we come to the crux of the matter. It is an organization's 
corporate culture that determines how ethical it will be, and it's all 
too common that organizations don't give a hoot about ethics.


When convenience, economy, speed and the next promotion become more 
important than quality, shortcuts become more common than preparing for 
the work, and small lapses of ethical practice may be excused with "we 
can make up for it later" -- leading to worse ones.


At one time, statistical quality control tests were required in EMC -- 
my first job was doing this for TEMPEST, VDE 0871 and FCC Part 15 -- and 
this not only finds things gone wrong, it can led to interesting 
telephone calls such as a Chinese factory manager screaming at me around 
midnight his time, "How come you shut down my factory?!?"  That one 
wasn't TEMPEST -- but I've a couple of stories about that too. There's a 
what, 50 years? timeline before I can tell 'em, and it won't be up for 
quite a while.


In general, no one wants to pay up front to avoid problems later -- but 
I've seen the frenzy  that can result from that approach.


So, on a larger stage, has the world, after just one person wanting to 
save $100 a day ended up costing maybe $100 MILLION over the long term.


Whoops.

https://www.rt.com/usa/332225-flint-water-crisis-failures-interview/


Cortland Richmond

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Re: [PSES] Practical ethics? -- text version

2016-12-26 Thread Cortland Richmond

One problem for engineers is that they work for people whose intent is 
to make money, and who are remarkably resistant to spending any more 
than is necessary to barely meet requirements and get products on the 
market. That is actually forgivable; what isn't forgivable is a 
willingness to accept not meeting performance, regulatory, or even 
safety requirements, accepting settlements and fines as part of the cost 
of doing business to make a little more on each unit that goes out the 
door. I wonder if ethics classes are doing anything to fix that.


Ethics Lesson: Many years ago, late at night, an armed helicopter landed 
at a base where I was stationed, with a radio problem that kept the 
pilot from talking to troops under attack. I was unable to fix the 
problem no matter what I replaced, and over the next few days, no one 
else in our maintenance shop could figure it out either.


But soldiers probably died that night because their close air support 
was gone.


Finally, I had the crew-chief run the rotor speed up to what the pilot 
had reported and, at some risk to myself, followed the cabling the 
length of the airframe until I found one assembly at the tip of the tail 
fin, right next to the spinning rotor, where the RF was being 
interrupted and reflected.


Taking it inside to the test bench, I discovered an internal capacitor 
lead had crystallized and broken, and -- at just one engine setting -- 
the ends of the break were vibrating enough to render radio 
transmissions unintelligible.


I might take some pride in finding that when nobody else could -- but 
people may have died because I was too tired, too lazy, or just not 
thinking well enough to to try that earlier.


Died.

That's an ethics class no one should have to take. Three rubber grommets 
could have prevented it, and I wonder how much was saved by leaving them 
out...


How many wounded or dead (if any) I can't say.

I once shut down a manager complaining an AED's EMC Test Plan I'd been 
contracted to write was too hard to pass and too expensive to meet. 
Never mind that the requirements had been increased, and all their own 
engineers were busy bringing existing products up to the new standard; 
when he asked why I'd made the test so hard I told him:


"I don't want you to kill people whose lives you're trying to save."

Ethics -- the hard way.

Cortland Richmond -- 26 December 2016

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[PSES] Practical ethics?

2016-12-26 Thread Cortland Richmond

I just spent some time working through a comment to a Quora blog entry 
about engineering ethics. Here's a link to what I wrote:


https://davidollodart.quora.com/Impracticality-of-Currently-Taught-Engineering-Ethics/comment/1134873

Cortland Richmond

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Re: [PSES] Incidental Radiators per FCC Part 15

2016-11-22 Thread Cortland Richmond


On 11/22/2016 9:46 AM, Grace Lin wrote:
Test data with the DC motor running did not comply with the Class A/B 
limits.  Test data without the DC motor running complies with the 
Class B limits. 


This isn't uncommon with brush-commutation DC motors; I've used small 
ones with a loop antenna as a broadband signal source.


As noted in other answers, it's not considered an incidental radiator if 
it doesn't make use of radio-frequency energy – but it could certainly 
generate interference complaints and should be dealt with – in my opinion.


Cortland Richmond

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Re: [PSES] Fwd: ESD, part of our training Enjoy!

2016-11-03 Thread Cortland Richmond


On 11/1/2016 8:53 AM, N. Shani wrote:

Well, I don't know if he's an idiot or a fool:


About 30 years ago, we got a brand-new ESD test gun at Wang Laboratories 
in Massachusetts, and I found it necessary to prove that the simulator 
delivered a similar waveform as a human.


I got to be the human.

My technique was to discharge the tip of the gun to a Pellegrini target 
feeding a 1 GHz delayed sweep 'scope.  These were the days when one 
needed a Polaroid camera (with 3000 speed film) whose shutter was 
triggered from the sweep.


We had a linoleum floor with no attention paid to ESD discharge, so it 
was pretty easy to charge myself up to 5 kV and discharge the potential 
from my outstretched finger to the target.  None of us will be surprised 
that it was a very close resemblance to the waveform the simulator produced.


However… A lot of us got into this line of work by playing.  Yes even as 
I dictate this, I can hear people thinking "Oh, that's what he's going 
to do!"   We'll see.


I put the sharp-pointed contact discharge tip on the simulator, and set 
up the gun at 25 KV continuous, aiming it to the mechanical doors some 5 
m away and locking down the trigger.


When high-ranking visitors decided to drop by and interrupt every kind 
of test, some of them classified, they would perforce have to walk 
through the area iwhere ions were most plentiful, and the accumulated 
charge would make them jump.  This had the desired effect.


The number of visitors dropped precipitously.

Did you get it right?


Cortland Richmond

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Re: [PSES] Fwd: ESD, part of our training Enjoy!

2016-11-03 Thread Cortland Richmond


On 11/1/2016 8:53 AM, N. Shani wrote:
a fool, on the other hand, know what to expect, but still goes and 
does his/her action/s


PS: I hope he was well paid.

Cortland

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Re: [PSES] ETSI EN 302 195 V2.1.1

2016-11-03 Thread Cortland Richmond


On 11/3/2016 3:36 AM, John Woodgate wrote:
I think ETSI is justified in resisting the Commission's bid to insist 
that 'a standard is only harmonized if we say so'.


*Someone* has missed the astounding concept that "harmony" and 
"harmonize" are English words ANYONE can use.  And that one should 
indicate with whom or what harmony is to be achieved.


sarc/ I wonder how long the EU bureaucracy's definition of "is" runs. 
And gets to use it. /sarc



Cortland Richmond

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Re: [PSES] CE for military aeronautical product

2016-10-20 Thread Cortland Richmond


On 10/19/2016 9:36 PM, Ed Price wrote:
The customer is king, whatever he wants (subject to his agreement to 
pay for), he can demand, and if you want the sale, you will comply


Bingo. You win the prize.

I've been surprised, sometimes, after working to beat down compliance 
problems, to be told the customer says it's OK, but in military 
contracts (and some others) the customer is able and willing to relax 
them -- and can convince regulators to let him.


Some of these problems have been inherited from decades-old agreements, 
and some will crop up again, as, once accepted, they set a precedent (at 
the same customer, anyway) for doing so again.


I suspect comrades in the craft will agree that's wise to record and 
institutionalize procedures to avoid such inherited problems in the 
future, but it's not unusual to find a design re-used because someone 
got a customer to relax requirements -- and it wasn't marked as one to 
avoid.


A former manager now retired-- the crazy guy who asked me to interview 
at  Smiths Aerospace  -- called this "Lessons Written Down."  Just not READ.


And then you get (a different manager, mind,)  "What part of STOP WORK 
don't you understand?"


OK.  But I was once brought into a company I won't name to write a test 
plan after all their EMC engineers were diverted to upgrade existing 
products to tougher standards. It has happened.


Whoops.

Cortland Richmond
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Re: [PSES] When is EMI testing performed?

2016-10-05 Thread Cortland Richmond


On 10/5/2016 1:06 AM, Manny Barron wrote:

I've never seen a product intentionally scheduled at the end of
environmental qualification for the specific purpose of assessing EMI
performance after it's been physically abused after all the other qual
testing.


We actually had a statistical quality control system at Wang Labs, and 
would take test units out of the shipping box after we completed the 
transportation vibration test, as well as testing items straight off the 
production line.


Wang is, of course, long gone

. Cortland Richmond

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Re: [PSES] When is EMI testing performed?

2016-10-04 Thread Cortland Richmond


On 10/4/2016 10:34 AM, Ken Javor wrote:

Have any of you ever seen EMI qualification intentionally scheduled at the
end of environmental qualification for the purpose of assessing EMI
performance after the suite of environmental tests has taken its toll?


While I was at Wang Laboratories, 1983-1987, we did this more than a few 
times, and I noted – when we did – that the results were often better 
than those of equipment straight off the production line.


I ascribed that to the oxide coating between conductive surfaces having 
been scrubbed off during vibration testing.


Not all environmental testing leaves equipment operational, of course.

Cortland Richmond

KA5S

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Re: [PSES] [RFI] Part 15 isn't enough..

2016-10-04 Thread Cortland Richmond


On 10/3/2016 12:08 PM, dward wrote:

To repeat the obvious.  The fact that the CE marking is or is not on a product 
in the US is really irrelevant to being able to be sold in the US.  The US 
market is not dependent upon other countries or Unions compliance agendas or 
standards.  It is only the necessary push by manufacturers to minimize the 
sizes of labels and yet have one label so as to sell in as many areas of the 
world as possible, that has made it so irrelevant and/ or unneeded markings, 
appear on products in The US; but they have absolutely no legal meaning.



Some of us reading this thread will remember having received a bit of a 
shock when our employers decided to sell products in Europe and 
encountered VDE 0871, with an expanded conducted emissions  range and 
stricter requirements.


Those of us who own and use communications equipment for our employers, 
agencies, or Amateur Radio stations  will also remember looking for the 
VDE label; it was much less likely to cause interference to our own 
operations and more likely to function while we were transmitting.  
This is one reason why many of us in the United States now look for a 
CE mark. Equipment bearing it is at least as good as Part 15 in meeting 
our needs, and it seems more likely to be enforced in countries that DO 
require it.


Cortland Richmond
KA5S

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Re: [PSES] [RFI] Part 15 isn't enough..

2016-10-01 Thread Cortland Richmond


On 10/1/2016 6:26 AM, john Allen wrote:

My comment about major manufacturers was partially based on the appearance
of a Sony TV on the apartmenttherapy website, as linked by Cortland,


Right site, wrong appliance; it was an oven,

" was summertime and we weren’t using our oven much but we noticed that 
occasionally the oven would just turn itself /on/. It’s the type of 
wall-mounted oven wherein you must turn the oven “on” then set the 
temperature before it actually starts warming up. If you turn the oven 
“on” and don’t set the temperature the oven beeps as a reminder. That’s 
what was happening: very randomly our oven would start beeping as a 
reminder for us to set the temperature. But we hadn’t turned the oven 
on. Why was it doing this? Additionally, when I did turn the oven on and 
set the temperature, the oven would turn itself off after eight minutes. 
It did this over and over again so I couldn’t complete a baking cycle. 
Please bear with this saga…"



Cortland RichmondKA5S

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Re: [PSES] [RFI] Part 15 isn't enough..


On 9/30/2016 2:16 PM, Ken Javor wrote:

I still don't understand what the applicability is, but if that statement
about MIL-STD-461 applies to products to be sold commercially, it has
serious issues and drawbacks that make it utterly impractical.


I suspect the choice of MIL-Standards was made to reduce emissions more 
than FCC rules require and thus increase the margin available to prevent 
interference in the marketplace.


The problem with lower numerical limits is, however, that either they 
become prohibitively expensive to manufacture, or they will be adopted 
pro forma and ignored in practice – which is often what manufacturers do 
already facing FCC limits.  It does not help to require compliance with 
standards never meant to apply to consumer devices.


A reasonable default limitation – Part 15 – can put a ceiling on the 
number of interference complaints, and a predictably expensive penalty 
for actually causing interference could ensure that manufacturers 
actually complied with those limits, thus my suggestion to require a 
manufacturer warranty covering the costs of remediation should 
interference occur.  I think that might be enough; if coupled with a 
warranty against susceptibility to nearby transmitters, it could 
substantially reduce the number of complaints from that side as well.


Cortland Richmond
KA5S

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Re: [PSES] [RFI] Part 15 isn't enough..


On 9/30/2016 1:03 PM, dward wrote:
Nor will there ever be anything in the FCC rules about immunity simply 
because that, as Gherry state, has nothing to do with the protection 
of the Spectrum.


The FCC already has the authority it needs to require *some* RF 
immunity, and has since 1982:


http://www.arrl.org/public-law-97-259

excerpt:


The FCC has opted for voluntary standards, rather than formal rules and 
regulations. The FCC and the ARRL are both active in an industry group 
(in cooperation with the American National Standards Institute, ANSI) 
that is studying "RF immunity issues." The Accredited Standards 
Committee C-63, has set an RFI-rejection standard for certain home 
electronic equipment. The voluntary standard provides for immunity of 
consumer equipment to some levels of RF field strength. This standard is 
not sufficient for full-power amateur stations under "worst case" 
conditions, but it covers the majority of cases. Starting in the second 
half of the 1990s, consumers started to see some built-in immunity in 
consumer products. The industry has a ways to go, but there is some 
light at the end of the tunnel.



Cortland
ka5s

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Re: [PSES] [RFI] Part 15 isn't enough..


On 9/30/2016 12:04 PM, Ken Javor wrote:

Was the original post that started this long thread saying that Part 15
wasn't enough, we also needed immunity requirements, or as I understood it, 
that Part 15 limits weren't low enough?


The latter, sort of,  but I added immunity (15.17) as a warranty item 
I'd like to see.


Here's the original:

Hey Gang,
I know we have all discussed "part 15 isn't enough", particularly when we
have talked about things like Solar systems

I was wondering - What if you were to say
"System shall be compliant with MIL-STD-461F,
 parts CE106,
 CS103,104,105,114,115,116
RE 102
and
RS 103, 105"

Think that should cover it?  Gives them an objective system of numbers to
work with

73 de KG2V
Charlie




Cortland
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Re: [PSES] [RFI] Part 15 isn't enough..