Mr. Stumpf provided a calculation of the voltage present at the antenna port, assuming the transmitter and antenna are both 50 Ohms. Mr. Cuthbert provided a calculation of the field intensity which is, as he pointed out, a function of both distance and antenna characteristics.
on 1/13/05 1:38 PM, Bill Stumpf at [email protected] wrote: > Lisa, > Here's how I calculate the conversion, assuming a 50 ohm system. > > 1) 5W x 50 ohm = 250 > > 2) square root of 250 = 15.81V > > To convert to dBuV: > > 1) 15.81/.000001 = 15811388.3uV > > 2) 20log 15811388.3 = 144dBuV > > Bill Stumpf > DLS Electronics > 166 South Carter St. > Genoa City WI 53128 > ph: 262-279-0210 > fx: 262-279-3630 > email: [email protected] > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > [email protected] > Sent: Thursday, January 13, 2005 8:31 AM > To: [email protected] > Subject: Question on RF conversion > > Good morning all, > > > Quick question, maybe.. > > If I have a Walkie Talkie that emits 5W at 430MHz, how does this > translate to V/m so that I can correlate the field strength with > radiated immunity testing? > > Thank for any input > > Regards, > > Lisa > > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/listserv/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] > Mike Mcantwell [email protected] > > For policy questions, send mail to: > > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc > > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/listserv/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] > Mike Mcantwell [email protected] > > For policy questions, send mail to: > > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc > This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Mcantwell [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
