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<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 <sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher: <j.bac...@ieee.org> > David Heald: <dhe...@gmail.com> > -- // 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) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
