Re: [PSES] Calculating Modulated Power Output. [General Use]

[Ralph McDiarmid]

Working the problem backwards can be a useful check;  keeping track of the 
units helps too.

Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
    


From: Patrick [mailto:conwa...@gmail.com] 
Sent: Wednesday, July 05, 2017 1:02 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Calculating Modulated Power Output. [General Use]

 Of course!  But I'm never that lucky !  :)

On Jul 5, 2017 13:27, "John Woodgate" <mailto:jmw1...@btinternet.com> wrote:
If they do agree, there are an even number of mistakes (counting 0 as even), of 
course.
 
With best wishes DESIGN IT IN! OOO – Own Opinions Only
http://www.jmwa.demon.co.uk/ J M Woodgate and Associates Rayleigh England
 
Sylvae in aeternum manent.
 
From: Patrick [mailto:mailto:conwa...@gmail.com] 
Sent: 05 July 2017 19:45
To: mailto:EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Calculating Modulated Power Output. [General Use]
 
Hi Andy - 
 
The calculation can be done either way, using dBW or Watts.  Either method will 
produce the same result.  Actually, I will often perform that calculation in 
both dBW and in Watts, then compare the results.  I use this to check my 
calculations.  If the two methods do not agree, then I've made a mistake, at 
least one, somewhere.
 
Good luck!
 
-Patrick
 
On Thu, Jun 29, 2017 at 7:33 AM, Price, Andrew (Leonardo, UK) 
<mailto:andrew.p.pr...@leonardocompany.com> wrote:
Hi all.

I hope one of the RF engineers can help with this.

When calculating ERP you use the Tx power either in dBW or W and the antenna 
gain in dBi.
So when you have pulse modulation,  example 9.3GHz, 38.5dBW (7676.89W) ERP at a 
duty cycle of 13%, do you calculate the modulated power level by using the ERP 
dBW or the actual ERP Watts?

Andy




         Andrew Price
             Land & Naval Defence Electronics Division
             Prinicpal Environmental Engineer (EMC)

             Leonardo MW Ltd
             Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
             Tel  EMC LAB : tel:+44%201268%20883308
             Mobile: tel:+44%207507%20854888
             
mailto:andrew.p.pr...@leonardocompany.com<mailto:mailto:andrew.p.pr...@leonardocompany.com>
             http://leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

This email and any attachments are confidential to the intended
recipient and may also be privileged. If you are not the intended
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-- 
//
Patrick
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-
---

Re: [PSES] Calculating Modulated Power Output. [General Use]

[Patrick]

 Of course!  But I'm never that lucky !  :)

On Jul 5, 2017 13:27, "John Woodgate"  wrote:

> If they do agree, there are an even number of mistakes (counting 0 as
> even), of course.
>
>
>
> With best wishes DESIGN IT IN! OOO – Own Opinions Only
>
> www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England
>
>
>
> Sylvae in aeternum manent.
>
>
>
> *From:* Patrick [mailto:conwa...@gmail.com]
> *Sent:* 05 July 2017 19:45
> *To:* EMC-PSTC@LISTSERV.IEEE.ORG
> *Subject:* Re: [PSES] Calculating Modulated Power Output. [General Use]
>
>
>
> Hi Andy -
>
>
>
> The calculation can be done either way, using dBW or Watts.  Either method
> will produce the same result.  Actually, I will often perform that
> calculation in both dBW and in Watts, then compare the results.  I use this
> to check my calculations.  If the two methods do not agree, then I've made
> a mistake, at least one, somewhere.
>
>
>
> Good luck!
>
>
>
> -Patrick
>
>
>
> On Thu, Jun 29, 2017 at 7:33 AM, Price, Andrew (Leonardo, UK) <
> andrew.p.pr...@leonardocompany.com> wrote:
>
> Hi all.
>
> I hope one of the RF engineers can help with this.
>
> When calculating ERP you use the Tx power either in dBW or W and the
> antenna gain in dBi.
> So when you have pulse modulation,  example 9.3GHz, 38.5dBW (7676.89W) ERP
> at a duty cycle of 13%, do you calculate the modulated power level by using
> the ERP dBW or the actual ERP Watts?
>
> Andy
>
>
>
>
>  Andrew Price
>  Land & Naval Defence Electronics Division
>  Prinicpal Environmental Engineer (EMC)
>
>  Leonardo MW Ltd
>  Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
>  Tel  EMC LAB : +44 (0)1268 883308 <+44%201268%20883308>
>  Mobile: +44 (0)7507 854888 <+44%207507%20854888>
>  andrew.p.pr...@leonardocompany.com<mailto:and
> rew.p.pr...@leonardocompany.com>
>  leonardocomapany.com
> HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS /
> SPACE
>
> * Please consider the environment before printing this email.
>
>
>
>
> Leonardo MW Ltd
> Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex
> SS14 3EL
> A company registered in England & Wales.  Company no. 02426132
> 
> This email and any attachments are confidential to the intended
> recipient and may also be privileged. If you are not the intended
> recipient please delete it from your system and notify the sender.
> You should not copy it or use it for any purpose nor disclose or
> distribute its contents to any other person.
> 
>
> -
> 
> This message is from the IEEE Product Safety Engineering Society emc-pstc
> discussion list. To post a message to the list, send your e-mail to <
> emc-p...@ieee.org>
>
> All emc-pstc postings are archived and searchable on the web at:
> http://www.ieee-pses.org/emc-pstc.html
>
> Attachments are not permitted but the IEEE PSES Online Communities site at
> http://product-compliance.oc.ieee.org/ can be used for graphics (in
> well-used formats), large files, etc.
>
> Website:  http://www.ieee-pses.org/
> Instructions:  http://www.ieee-pses.org/list.html (including how to
> unsubscribe)
> List rules: http://www.ieee-pses.org/listrules.html
>
> For help, send mail to the list administrators:
> Scott Douglas 
> Mike Cantwell 
>
> For policy questions, send mail to:
> Jim Bacher:  
> David Heald: 
>
>
>
>
>
> --
>
> //
>
> Patrick
>
> -
> 
>
> This message is from the IEEE Product Safety Engineering Society emc-pstc
> discussion list. To post a message to the list, send your e-mail to <
> emc-p...@ieee.org>
>
> All emc-pstc postings are archived and searchable on the web at:
> http://www.ieee-pses.org/emc-pstc.html
>
> Attachments are not permitted but the IEEE PSES Online Communities site at
> http://product-compliance.oc.ieee.org/ can be used for graphics (in
> well-used formats), large files, etc.
>
> Website: http://www.ieee-pses.org/
> Instructions: http://www.ieee-pses.org/list.html (including how to
> unsubscribe) <http://www.ieee-pses.org/list.html>
> List rules: http://www.ieee-pses.org/listrules.html
>
> For help, send mail to the list administrators:
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> Mike Cantwell 

Re: [PSES] Calculating Modulated Power Output. [General Use]

[John Woodgate]

If they do agree, there are an even number of mistakes (counting 0 as even), of 
course.
 
With best wishes DESIGN IT IN! OOO – Own Opinions Only
 <http://www.jmwa.demon.co.uk/> www.jmwa.demon.co.uk J M Woodgate and 
Associates Rayleigh England
 
Sylvae in aeternum manent.
 
From: Patrick [mailto:conwa...@gmail.com] 
Sent: 05 July 2017 19:45
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Calculating Modulated Power Output. [General Use]
 
Hi Andy - 
 
The calculation can be done either way, using dBW or Watts.  Either method will 
produce the same result.  Actually, I will often perform that calculation in 
both dBW and in Watts, then compare the results.  I use this to check my 
calculations.  If the two methods do not agree, then I've made a mistake, at 
least one, somewhere.
 
Good luck!
 
-Patrick
 
On Thu, Jun 29, 2017 at 7:33 AM, Price, Andrew (Leonardo, UK) 
mailto:andrew.p.pr...@leonardocompany.com> 
> wrote:
Hi all.

I hope one of the RF engineers can help with this.

When calculating ERP you use the Tx power either in dBW or W and the antenna 
gain in dBi.
So when you have pulse modulation,  example 9.3GHz, 38.5dBW (7676.89W) ERP at a 
duty cycle of 13%, do you calculate the modulated power level by using the ERP 
dBW or the actual ERP Watts?

Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 andrew.p.pr...@leonardocompany.com 
<mailto:andrew.p.pr...@leonardocompany.com> 
<mailto:andrew.p.pr...@leonardocompany.com 
<mailto:andrew.p.pr...@leonardocompany.com> >
 leonardocomapany.com <http://leonardocomapany.com> 
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

This email and any attachments are confidential to the intended
recipient and may also be privileged. If you are not the intended
recipient please delete it from your system and notify the sender.
You should not copy it or use it for any purpose nor disclose or
distribute its contents to any other person.


-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 
mailto:emc-p...@ieee.org> >

All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html

Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.

Website:  http://www.ieee-pses.org/
Instructions:  http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:
Scott Douglas mailto:sdoug...@ieee.org> >
Mike Cantwell mailto:mcantw...@ieee.org> >

For policy questions, send mail to:
Jim Bacher:  mailto:j.bac...@ieee.org> >
David Heald: mailto:dhe...@gmail.com> >



 
-- 
//
Patrick
-

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mailto:emc-p...@ieee.org> >
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Attachments are not permitted but the IEEE PSES Online Communities site at 
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<http://www.ieee-pses.org/list.html> 
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Jim Bacher mailto:j.bac...@ieee.org> >
David Heald mailto:dhe...@gmail.com> > 

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discussion list. To post a message to the list, send your e-mail to 


All emc-pstc postings are archived and searchable on the web at:
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Att

Re: [PSES] Calculating Modulated Power Output. [General Use]

[Patrick]

Hi Andy -

The calculation can be done either way, using dBW or Watts.  Either method
will produce the same result.  Actually, I will often perform that
calculation in both dBW and in Watts, then compare the results.  I use this
to check my calculations.  If the two methods do not agree, then I've made
a mistake, at least one, somewhere.

Good luck!

-Patrick

On Thu, Jun 29, 2017 at 7:33 AM, Price, Andrew (Leonardo, UK) <
andrew.p.pr...@leonardocompany.com> wrote:

> Hi all.
>
> I hope one of the RF engineers can help with this.
>
> When calculating ERP you use the Tx power either in dBW or W and the
> antenna gain in dBi.
> So when you have pulse modulation,  example 9.3GHz, 38.5dBW (7676.89W) ERP
> at a duty cycle of 13%, do you calculate the modulated power level by using
> the ERP dBW or the actual ERP Watts?
>
> Andy
>
>
>
>
>  Andrew Price
>  Land & Naval Defence Electronics Division
>  Prinicpal Environmental Engineer (EMC)
>
>  Leonardo MW Ltd
>  Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
>  Tel  EMC LAB : +44 (0)1268 883308
>  Mobile: +44 (0)7507 854888
>  andrew.p.pr...@leonardocompany.com rew.p.pr...@leonardocompany.com>
>  leonardocomapany.com
> HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS /
> SPACE
>
> * Please consider the environment before printing this email.
>
>
>
>
> Leonardo MW Ltd
> Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex
> SS14 3EL
> A company registered in England & Wales.  Company no. 02426132
> 
> This email and any attachments are confidential to the intended
> recipient and may also be privileged. If you are not the intended
> recipient please delete it from your system and notify the sender.
> You should not copy it or use it for any purpose nor disclose or
> distribute its contents to any other person.
> 
>
> -
> 
> This message is from the IEEE Product Safety Engineering Society emc-pstc
> discussion list. To post a message to the list, send your e-mail to <
> emc-p...@ieee.org>
>
> All emc-pstc postings are archived and searchable on the web at:
> http://www.ieee-pses.org/emc-pstc.html
>
> Attachments are not permitted but the IEEE PSES Online Communities site at
> http://product-compliance.oc.ieee.org/ can be used for graphics (in
> well-used formats), large files, etc.
>
> Website:  http://www.ieee-pses.org/
> Instructions:  http://www.ieee-pses.org/list.html (including how to
> unsubscribe)
> List rules: http://www.ieee-pses.org/listrules.html
>
> For help, send mail to the list administrators:
> Scott Douglas 
> Mike Cantwell 
>
> For policy questions, send mail to:
> Jim Bacher:  
> David Heald: 
>



-- 
//
Patrick

-

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discussion list. To post a message to the list, send your e-mail to 


All emc-pstc postings are archived and searchable on the web at:
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Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.

Website:  http://www.ieee-pses.org/
Instructions:  http://www.ieee-pses.org/list.html (including how to unsubscribe)
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For help, send mail to the list administrators:
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Mike Cantwell 

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Jim Bacher:  
David Heald: 

Re: [PSES] Calculating Modulated Power Output. [General Use]

[Ken Javor]

Why should it make a difference?

Ken Javor
Phone: (256) 650-5261



> From: "Price, Andrew (Leonardo, UK)" 
> Reply-To: "Price, Andrew (Leonardo, UK)" 
> Date: Thu, 29 Jun 2017 13:33:07 +
> To: 
> Conversation: Calculating Modulated Power Output. [General Use]
> Subject: [PSES] Calculating Modulated Power Output. [General Use]
> 
> Hi all.
> 
> I hope one of the RF engineers can help with this.
> 
> When calculating ERP you use the Tx power either in dBW or W and the antenna
> gain in dBi.
> So when you have pulse modulation,  example 9.3GHz, 38.5dBW (7676.89W) ERP at
> a duty cycle of 13%, do you calculate the modulated power level by using the
> ERP dBW or the actual ERP Watts?
> 
> Andy
> 
> 
> 
> 
>  Andrew Price
>  Land & Naval Defence Electronics Division
>  Prinicpal Environmental Engineer (EMC)
> 
>  Leonardo MW Ltd
>  Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
>  Tel  EMC LAB : +44 (0)1268 883308
>  Mobile: +44 (0)7507 854888
>  
> andrew.p.pr...@leonardocompany.com<mailto:andrew.p.pr...@leonardocompany.com>
>  leonardocomapany.com
> HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE
> 
> * Please consider the environment before printing this email.
> 
> 
> 
> 
> Leonardo MW Ltd
> Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14
> 3EL
> A company registered in England & Wales.  Company no. 02426132
> 
> This email and any attachments are confidential to the intended
> recipient and may also be privileged. If you are not the intended
> recipient please delete it from your system and notify the sender.
> You should not copy it or use it for any purpose nor disclose or
> distribute its contents to any other person.
> 
> 
> -
> 
> This message is from the IEEE Product Safety Engineering Society emc-pstc
> discussion list. To post a message to the list, send your e-mail to
> 
> 
> All emc-pstc postings are archived and searchable on the web at:
> http://www.ieee-pses.org/emc-pstc.html
> 
> Attachments are not permitted but the IEEE PSES Online Communities site at
> http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used
> formats), large files, etc.
> 
> Website:  http://www.ieee-pses.org/
> Instructions:  http://www.ieee-pses.org/list.html (including how to
> unsubscribe)
> List rules: http://www.ieee-pses.org/listrules.html
> 
> For help, send mail to the list administrators:
> Scott Douglas 
> Mike Cantwell 
> 
> For policy questions, send mail to:
> Jim Bacher:  
> David Heald: 

-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 


All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html

Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.

Website:  http://www.ieee-pses.org/
Instructions:  http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:
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Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald: 

[PSES] Calculating Modulated Power Output. [General Use]

[Price, Andrew (Leonardo, UK)]

Hi all.

I hope one of the RF engineers can help with this.

When calculating ERP you use the Tx power either in dBW or W and the antenna 
gain in dBi.
So when you have pulse modulation,  example 9.3GHz, 38.5dBW (7676.89W) ERP at a 
duty cycle of 13%, do you calculate the modulated power level by using the ERP 
dBW or the actual ERP Watts?

Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

This email and any attachments are confidential to the intended
recipient and may also be privileged. If you are not the intended
recipient please delete it from your system and notify the sender.
You should not copy it or use it for any purpose nor disclose or
distribute its contents to any other person.


-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 


All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html

Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.

Website:  http://www.ieee-pses.org/
Instructions:  http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:
Scott Douglas 
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald: