Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Radio noise

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List
View previous topic :: View next topic  
Author Message
paul.the.aviator(at)gmail
Guest





PostPosted: Sun Apr 02, 2023 6:12 pm    Post subject: Radio noise Reply with quote

Hello Bob,

Do you have a technical document on the process of identifying the source(s) radio noise? 
I have searched your website and I couldn’t find what I was looking for.
Thank you, Paul


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
nuckolls.bob(at)aeroelect
Guest





PostPosted: Mon Apr 03, 2023 2:42 pm    Post subject: Radio noise Reply with quote

At 09:11 PM 4/2/2023, you wrote:
Quote:
Hello Bob,

Do you have a technical document on the process of identifying the source(s) radio noise?

I have searched your website and I couldn’t find what I was looking for.

Thank you, Paul


Interesting question for which I don't
have an answer of the top . . .

I've never encountered a document that
prescribes recipes for investigation.
Doesn't mean one does not exist but
it's not how I acquired the skills.

I took courses and applied information
on how to design and then qualify devices
demonstrating harmonious integration
products into the aviation electronic
environment. After a few decades of
hammering out those solutions, you
sorta develop a sense of which guiding
principal is NOT in operation when
tracking down root cause of a problem.

Are you wrestling with a problem now?




Bob . . .

////
(o o)
===========o00o=(_)=o00o=========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
=================================

In the interest of creative evolution
of the-best-we-know-how-to-do based
on physics and good practice.


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
paul.the.aviator(at)gmail
Guest





PostPosted: Tue Apr 04, 2023 6:40 am    Post subject: Radio noise Reply with quote

Hi Bob, no not really but a couple of things came up recently that piqued my curiosity.
I rented a RV12 from the local flight school and the background noise on the radio was loud.  It was fitted out with a Dynon and a Garmin SL40.  I’m not particularly interested to dig into it but I was look for a “tips’s and tricks” document that I could pass onto the owner.
The noise sounded like “electronic hash” and could probably be filtered out on the feed to the radio but that approach doesn’t address the root cause.
The other noisy radio gremlin is on a friend’s C150.  I haven’t dug into it yet but it sounds awfully like a failed diode in the alternator. I will dig out my oscilloscope and take a look once the weather has warmed up.
Cheers, Paul

On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

Quote:
At 09:11 PM 4/2/2023, you wrote:


Quote:

    Interesting question for which I don't
    have an answer of the top . . .

    I've never encountered a document that
    prescribes recipes for investigation.
    Doesn't mean one does not exist but
    it's not how I acquired the skills.

    I took courses and applied information
    on how to design and then qualify devices
    demonstrating harmonious integration
    products into the aviation electronic
    environment. After a few decades of
    hammering out those solutions, you
    sorta develop a sense of which guiding
    principal is NOT in operation when
    tracking down root cause of a problem.

    Are you wrestling with a problem now?
   



  Bob . . .

                   ////
                  (o o)
   ===========o00o=(_)=o00o=========
   < Go ahead, make my day . . .   >
   < show me where I'm wrong.      >
   =================================
 
   In the interest of creative evolution
   of the-best-we-know-how-to-do based
   on physics and good practice.



- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
wdaniell.longport(at)gmai
Guest





PostPosted: Tue Apr 04, 2023 6:52 am    Post subject: Radio noise Reply with quote

PaulIf its a dynon you can try entering settings/radio and turning mic gain to 25%. 
You enter setting by long press two right hand buttons simultaneously.
Will

William Daniell
+1 786 878 0246

On Tue, Apr 4, 2023, 10:48 Paul McAllister <paul.the.aviator(at)gmail.com (paul.the.aviator(at)gmail.com)> wrote:

Quote:

Hi Bob, no not really but a couple of things came up recently that piqued my curiosity.
I rented a RV12 from the local flight school and the background noise on the radio was loud.  It was fitted out with a Dynon and a Garmin SL40.  I’m not particularly interested to dig into it but I was look for a “tips’s and tricks” document that I could pass onto the owner.
The noise sounded like “electronic hash” and could probably be filtered out on the feed to the radio but that approach doesn’t address the root cause.
The other noisy radio gremlin is on a friend’s C150.  I haven’t dug into it yet but it sounds awfully like a failed diode in the alternator. I will dig out my oscilloscope and take a look once the weather has warmed up.
Cheers, Paul

On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

Quote:
At 09:11 PM 4/2/2023, you wrote:


Quote:

    Interesting question for which I don't
    have an answer of the top . . .

    I've never encountered a document that
    prescribes recipes for investigation.
    Doesn't mean one does not exist but
    it's not how I acquired the skills.

    I took courses and applied information
    on how to design and then qualify devices
    demonstrating harmonious integration
    products into the aviation electronic
    environment. After a few decades of
    hammering out those solutions, you
    sorta develop a sense of which guiding
    principal is NOT in operation when
    tracking down root cause of a problem.

    Are you wrestling with a problem now?
   



  Bob . . .

                   ////
                  (o o)
   ===========o00o=(_)=o00o=========
   < Go ahead, make my day . . .   >
   < show me where I'm wrong.      >
   =================================
 
   In the interest of creative evolution
   of the-best-we-know-how-to-do based
   on physics and good practice.





- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
Ceengland



Joined: 11 Oct 2020
Posts: 378
Location: MS

PostPosted: Tue Apr 04, 2023 7:15 am    Post subject: Radio noise Reply with quote

I have a very fuzzy memory of some early Dynon screens emitting RF hash. Might be worth perusing the Dynon forum archives to see if something pops up.
On Tue, Apr 4, 2023 at 9:55 AM William Daniell <wdaniell.longport(at)gmail.com (wdaniell.longport(at)gmail.com)> wrote:

Quote:
PaulIf its a dynon you can try entering settings/radio and turning mic gain to 25%. 
You enter setting by long press two right hand buttons simultaneously.
Will

William Daniell
+1 786 878 0246

On Tue, Apr 4, 2023, 10:48 Paul McAllister <paul.the.aviator(at)gmail.com (paul.the.aviator(at)gmail.com)> wrote:

Quote:

Hi Bob, no not really but a couple of things came up recently that piqued my curiosity.
I rented a RV12 from the local flight school and the background noise on the radio was loud.  It was fitted out with a Dynon and a Garmin SL40.  I’m not particularly interested to dig into it but I was look for a “tips’s and tricks” document that I could pass onto the owner.
The noise sounded like “electronic hash” and could probably be filtered out on the feed to the radio but that approach doesn’t address the root cause.
The other noisy radio gremlin is on a friend’s C150.  I haven’t dug into it yet but it sounds awfully like a failed diode in the alternator. I will dig out my oscilloscope and take a look once the weather has warmed up.
Cheers, Paul

On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

Quote:
At 09:11 PM 4/2/2023, you wrote:


Quote:

    Interesting question for which I don't
    have an answer of the top . . .

    I've never encountered a document that
    prescribes recipes for investigation.
    Doesn't mean one does not exist but
    it's not how I acquired the skills.

    I took courses and applied information
    on how to design and then qualify devices
    demonstrating harmonious integration
    products into the aviation electronic
    environment. After a few decades of
    hammering out those solutions, you
    sorta develop a sense of which guiding
    principal is NOT in operation when
    tracking down root cause of a problem.

    Are you wrestling with a problem now?
   



  Bob . . .

                   ////
                  (o o)
   ===========o00o=(_)=o00o=========
   < Go ahead, make my day . . .   >
   < show me where I'm wrong.      >
   =================================
 
   In the interest of creative evolution
   of the-best-we-know-how-to-do based
   on physics and good practice.






- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Charlie
Back to top
View user's profile Send private message
sremerez(at)mailfence.com
Guest





PostPosted: Tue Apr 04, 2023 7:37 am    Post subject: Radio noise Reply with quote

Paul,

I have some ideas about how to fix noise problems. The trick is two-fold. One is to eliminate the source noise. Two is to make the destination more immune to noise. If you want my advice, send me an email. It's free and worth every penny.
Simon
On Apr 4, 2023 at 10:39 AM, Paul McAllister <paul.the.aviator(at)gmail.com> wrote:
Quote:
">
Hi Bob, no not really but a couple of things came up recently that piqued my curiosity.
I rented a RV12 from the local flight school and the background noise on the radio was loud. It was fitted out with a Dynon and a Garmin SL40. I’m not particularly interested to dig into it but I was look for a “tips’s and tricks” document that I could pass onto the owner.
The noise sounded like “electronic hash” and could probably be filtered out on the feed to the radio but that approach doesn’t address the root cause.
The other noisy radio gremlin is on a friend’s C150. I haven’t dug into it yet but it sounds awfully like a failed diode in the alternator. I will dig out my oscilloscope and take a look once the weather has warmed up.
Cheers, Paul

On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

Quote:
At 09:11 PM 4/2/2023, you wrote:


Quote:

Interesting question for which I don't
have an answer of the top . . .

I've never encountered a document that
prescribes recipes for investigation.
Doesn't mean one does not exist but
it's not how I acquired the skills.

I took courses and applied information
on how to design and then qualify devices
demonstrating harmonious integration
products into the aviation electronic
environment. After a few decades of
hammering out those solutions, you
sorta develop a sense of which guiding
principal is NOT in operation when
tracking down root cause of a problem.

Are you wrestling with a problem now?




Bob . . .

////
(o o)
===========o00o=(_)=o00o=========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
=================================

In the interest of creative evolution
of the-best-we-know-how-to-do based
on physics and good practice.





- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
paul.the.aviator(at)gmail
Guest





PostPosted: Tue Apr 04, 2023 8:49 am    Post subject: Radio noise Reply with quote

Will,
The EFIS is a Dynon but the radio is a Garmin SL40. If not familiar with Dynon, is there a possibility that the mic input would be routed through the EFIS to the SL40?
Thanks, Paul

On Tue, Apr 4, 2023 at 9:55 AM William Daniell <wdaniell.longport(at)gmail.com (wdaniell.longport(at)gmail.com)> wrote:

Quote:
PaulIf its a dynon you can try entering settings/radio and turning mic gain to 25%. 
You enter setting by long press two right hand buttons simultaneously.
Will

William Daniell
+1 786 878 0246

On Tue, Apr 4, 2023, 10:48 Paul McAllister <paul.the.aviator(at)gmail.com (paul.the.aviator(at)gmail.com)> wrote:

Quote:

Hi Bob, no not really but a couple of things came up recently that piqued my curiosity.
I rented a RV12 from the local flight school and the background noise on the radio was loud.  It was fitted out with a Dynon and a Garmin SL40.  I’m not particularly interested to dig into it but I was look for a “tips’s and tricks” document that I could pass onto the owner.
The noise sounded like “electronic hash” and could probably be filtered out on the feed to the radio but that approach doesn’t address the root cause.
The other noisy radio gremlin is on a friend’s C150.  I haven’t dug into it yet but it sounds awfully like a failed diode in the alternator. I will dig out my oscilloscope and take a look once the weather has warmed up.
Cheers, Paul

On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

Quote:
At 09:11 PM 4/2/2023, you wrote:


Quote:

    Interesting question for which I don't
    have an answer of the top . . .

    I've never encountered a document that
    prescribes recipes for investigation.
    Doesn't mean one does not exist but
    it's not how I acquired the skills.

    I took courses and applied information
    on how to design and then qualify devices
    demonstrating harmonious integration
    products into the aviation electronic
    environment. After a few decades of
    hammering out those solutions, you
    sorta develop a sense of which guiding
    principal is NOT in operation when
    tracking down root cause of a problem.

    Are you wrestling with a problem now?
   



  Bob . . .

                   ////
                  (o o)
   ===========o00o=(_)=o00o=========
   < Go ahead, make my day . . .   >
   < show me where I'm wrong.      >
   =================================
 
   In the interest of creative evolution
   of the-best-we-know-how-to-do based
   on physics and good practice.






- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
paul.the.aviator(at)gmail
Guest





PostPosted: Tue Apr 04, 2023 8:52 am    Post subject: Radio noise Reply with quote

Great idea, I’ll post a question on the Dynon forum.

On Tue, Apr 4, 2023 at 10:19 AM Charlie England <ceengland7(at)gmail.com (ceengland7(at)gmail.com)> wrote:

Quote:
I have a very fuzzy memory of some early Dynon screens emitting RF hash. Might be worth perusing the Dynon forum archives to see if something pops up.


Quote:
Quote:






- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
Ceengland



Joined: 11 Oct 2020
Posts: 378
Location: MS

PostPosted: Tue Apr 04, 2023 9:48 am    Post subject: Radio noise Reply with quote

I'm not Will, but that would be extremely unlikely (unless we're talking about Dynon's intercom).
https://dynonavionics.com/two-place-stereo-intercom.php


On 4/4/2023 11:48 AM, Paul McAllister wrote:

Quote:
Will,


The EFIS is a Dynon but the radio is a Garmin SL40. If not familiar with Dynon, is there a possibility that the mic input would be routed through the EFIS to the SL40?


Thanks, Paul

On Tue, Apr 4, 2023 at 9:55 AM William Daniell <wdaniell.longport(at)gmail.com (wdaniell.longport(at)gmail.com)> wrote:

Quote:
Paul If its a dynon you can try entering settings/radio and turning mic gain to 25%. 


You enter setting by long press two right hand buttons simultaneously.


Will

William Daniell
+1 786 878 0246



On Tue, Apr 4, 2023, 10:48 Paul McAllister <paul.the.aviator(at)gmail.com (paul.the.aviator(at)gmail.com)> wrote:

Quote:

Hi Bob, no not really but a couple of things came up recently that piqued my curiosity.


I rented a RV12 from the local flight school and the background noise on the radio was loud.  It was fitted out with a Dynon and a Garmin SL40.  I’m not particularly interested to dig into it but I was look for a “tips’s and tricks” document that I could pass onto the owner.


The noise sounded like “electronic hash” and could probably be filtered out on the feed to the radio but that approach doesn’t address the root cause.


The other noisy radio gremlin is on a friend’s C150.  I haven’t dug into it yet but it sounds awfully like a failed diode in the alternator. I will dig out my oscilloscope and take a look once the weather has warmed up.


Cheers, Paul

On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

Quote:
At 09:11 PM 4/2/2023, you wrote:


Quote:

    Interesting question for which I don't
    have an answer of the top . . .

    I've never encountered a document that
    prescribes recipes for investigation.
    Doesn't mean one does not exist but
    it's not how I acquired the skills.

    I took courses and applied information
    on how to design and then qualify devices
    demonstrating harmonious integration
    products into the aviation electronic
    environment. After a few decades of
    hammering out those solutions, you
    sorta develop a sense of which guiding
    principal is NOT in operation when
    tracking down root cause of a problem.

    Are you wrestling with a problem now?
   



  Bob . . .

                   ////
                  (o o)
   ===========o00o=(_)=o00o=========
   < Go ahead, make my day . . .   >
   < show me where I'm wrong.      >
   =================================
 
   In the interest of creative evolution
   of the-best-we-know-how-to-do based
   on physics and good practice.







Virus-free.www.avast.com[url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2] [/url]


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Charlie
Back to top
View user's profile Send private message
wdaniell.longport(at)gmai
Guest





PostPosted: Tue Apr 04, 2023 5:50 pm    Post subject: Radio noise Reply with quote

Ah...with the dynon system you can control the radio settings through the main screen.  Dunno if this would work with a garmin radio.

William Daniell
+1 786 878 0246

On Tue, Apr 4, 2023, 13:50 Charlie England <ceengland7(at)gmail.com (ceengland7(at)gmail.com)> wrote:

Quote:
I'm not Will, but that would be extremely unlikely (unless we're talking about Dynon's intercom).
https://dynonavionics.com/two-place-stereo-intercom.php


On 4/4/2023 11:48 AM, Paul McAllister wrote:

Quote:
Will,


The EFIS is a Dynon but the radio is a Garmin SL40. If not familiar with Dynon, is there a possibility that the mic input would be routed through the EFIS to the SL40?


Thanks, Paul

On Tue, Apr 4, 2023 at 9:55 AM William Daniell <wdaniell.longport(at)gmail.com (wdaniell.longport(at)gmail.com)> wrote:

Quote:
Paul If its a dynon you can try entering settings/radio and turning mic gain to 25%. 


You enter setting by long press two right hand buttons simultaneously.


Will

William Daniell
+1 786 878 0246



On Tue, Apr 4, 2023, 10:48 Paul McAllister <paul.the.aviator(at)gmail.com (paul.the.aviator(at)gmail.com)> wrote:

Quote:

Hi Bob, no not really but a couple of things came up recently that piqued my curiosity.


I rented a RV12 from the local flight school and the background noise on the radio was loud.  It was fitted out with a Dynon and a Garmin SL40.  I’m not particularly interested to dig into it but I was look for a “tips’s and tricks” document that I could pass onto the owner.


The noise sounded like “electronic hash” and could probably be filtered out on the feed to the radio but that approach doesn’t address the root cause.


The other noisy radio gremlin is on a friend’s C150.  I haven’t dug into it yet but it sounds awfully like a failed diode in the alternator. I will dig out my oscilloscope and take a look once the weather has warmed up.


Cheers, Paul

On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

Quote:
At 09:11 PM 4/2/2023, you wrote:


Quote:

    Interesting question for which I don't
    have an answer of the top . . .

    I've never encountered a document that
    prescribes recipes for investigation.
    Doesn't mean one does not exist but
    it's not how I acquired the skills.

    I took courses and applied information
    on how to design and then qualify devices
    demonstrating harmonious integration
    products into the aviation electronic
    environment. After a few decades of
    hammering out those solutions, you
    sorta develop a sense of which guiding
    principal is NOT in operation when
    tracking down root cause of a problem.

    Are you wrestling with a problem now?
   



  Bob . . .

                   ////
                  (o o)
   ===========o00o=(_)=o00o=========
   < Go ahead, make my day . . .   >
   < show me where I'm wrong.      >
   =================================
 
   In the interest of creative evolution
   of the-best-we-know-how-to-do based
   on physics and good practice.








Virus-free.www.avast.com[url=#m_6527359612219019859_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2] [/url]



- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
nuckolls.bob(at)aeroelect
Guest





PostPosted: Sun Apr 09, 2023 4:14 pm    Post subject: Radio noise Reply with quote

Spent some time poking around the 'net looking for
guidance on tracking down noise in systems. LOTS
of articles dealing with component and design
level EMI management but so far, nothing on chasing
down the elusive antagonist/propagation modes
in complex systems.

If anyone stumbles across such a narrative, I'd
appreciate a heads-up.

At both Beech and Cessna, we enjoyed very
well equipped facilities, test equipment
and experienced individuals cognizant in
the fine arts of 'noise'. Even so, there
were encounters with situations so off the
wall that cost tens of thousands of dollars
to track down. When finally 'cured', numerous
investigators were smacking their foreheads
thinking, "how did I not think of that?' . . .
yours truly included.

I'll have to tell you guys my favorite story
about that sometime.

In the mean time, I've spent a little asphalt
engineering time thinking about the current
state of 'our art' in electro-magnetic
compatibility. I put off the chapter
on EMC to one of the last in Rev12 but
perhaps that chapter could use some refinement
and expansion.

I really DO need to update that book!





Bob . . .

////
(o o)
===========o00o=(_)=o00o=========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
=================================

In the interest of creative evolution
of the-best-we-know-how-to-do based
on physics and good practice.


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
Voyager



Joined: 30 Jun 2020
Posts: 77

PostPosted: Sun Apr 09, 2023 5:26 pm    Post subject: Radio noise Reply with quote

I took a course many years ago, probably early to mid-90s, from Dr. Tom Van Doren a professor at the University of Missouri-Rolla. This was one of the best courses I had in this area and Tom is very knowledgeable in this area. He also runs a small company that sells probes to help locate unwanted emissions of electrical noise.

I am not sure if Tom is still active or even if he is still alive as I’ve had no contact with him for probably 30 years, but I did find some of his course notes available online. The notes don’t really stand alone very well and need his course instruction, but they do give some hints on the topic and how to identify noise types, sources and coupling mechanisms.
ewh.ieee.org

[img]data:image/png;base64,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[/img]

I have a hard copy of the class notes that are a little more expansive than those at the url, but still they don’t stand alone all that well and I can’t even understand all of my chicken scratch notes after all these years. Anyone who really wants to delve into this might want to try to contact Tom and see if he can recommend a text on the subject that might serve as a better reference for self-study. And to really troubleshoot you probably need a good scope and one or more of Tom’s probes.
Matt Whiting
Sent from my iPad

Quote:
On Apr 9, 2023, at 8:16 PM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com> wrote:

 Spent some time poking around the 'net looking for
guidance on tracking down noise in systems. LOTS
of articles dealing with component and design
level EMI management but so far, nothing on chasing
down the elusive antagonist/propagation modes
in complex systems.

If anyone stumbles across such a narrative, I'd
appreciate a heads-up.

At both Beech and Cessna, we enjoyed very
well equipped facilities, test equipment
and experienced individuals cognizant in
the fine arts of 'noise'. Even so, there
were encounters with situations so off the
wall that cost tens of thousands of dollars
to track down. When finally 'cured', numerous
investigators were smacking their foreheads
thinking, "how did I not think of that?' . . .
yours truly included.

I'll have to tell you guys my favorite story
about that sometime.

In the mean time, I've spent a little asphalt
engineering time thinking about the current
state of 'our art' in electro-magnetic
compatibility. I put off the chapter
on EMC to one of the last in Rev12 but
perhaps that chapter could use some refinement
and expansion.

I really DO need to update that book!





Bob . . .

////
(o o)
===========o00o=(_)=o00o=========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
=================================

In the interest of creative evolution
of the-best-we-know-how-to-do based
on physics and good practice.



- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group