1) The authorized power varies from station to station and is a function of station class, time of day, geographical, and frequency coordination factors. None exceed 50kW, however, I've seen as low as 5 watts.
2) This number represents the power delivered to the antenna/array feedpoint/common point. 3) Many stations use directional arrays having relatively high gain. 4 dBi would not be representative. 4) The power represents unmodulated carrier power. Stu Benner [email protected] From: [email protected] [mailto:[email protected]] On Behalf Of Ken Javor Sent: Thursday, November 10, 2005 3:38 PM To: [email protected] Subject: Limit on AM Broadcast power, USA All, I need to know what the legal rf transmit power limit is for broadcasters in the 530 to 1710 kHz AM broadcast band in the USA. I believe the number is 50 kW, but I have several questions: 1) Is 50 kW correct? 2) Whether the correct answer to (1) is 50 kW or another number, does that number represent effective radiated power? That is, does the number include antenna gain or is it just the transmitter power available at the antenna input terminal? 3) If the number is just transmit power, is 4 dBi a reasonable maximum gain for a real-world AM broadcast antenna? 4) Whether the power figure is ERP or just power available to the antenna, does it represent average or unmodulated power, or is it the envelope of peak modulation? Thank you in advance, Ken Javor - 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 Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ****************************************** The information contained in, or attached to, this e-mail, may contain confidential information and is intended solely for the use of the individual or entity to whom they are addressed and may be subject to legal privilege. If you have received this e-mail in error you should notify the sender immediately by reply e-mail, delete the message from your system and notify your system manager. Please do not copy it for any purpose, or disclose its contents to any other person. The views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of the company. The recipient should check this e-mail and any attachments for the presence of viruses. The company accepts no liability for any damage caused, directly or indirectly, by any virus transmitted in this email. ****************************************** - 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 Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
