Lisa, That depends on the gain and efficiency of the antenna. However, for a single data point I measured an old amateur radio HT (Yaesu FT-727R) a number of years ago on both the 2 meter (144-148 MHz) and 70 cm (440-450 MHz) bands in a 10 meter RF semi-anechoic chamber. The HT was placed on an 80 cm high non-conducting table. I connected a speaker-mic so I could lock key the radio for the measurements. On both bands, at a distance of 10 meters, the measured field strength was 1 V/m. If one believes 1/R, then the field strength at 1 meter would have been 10 V/m. Just a data point for the discussion.
Ghery S. Pettit, N6TPT Intel Corporation From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, January 13, 2005 6:31 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
