If the -3db point of your AM modulator is say 3600HZ then your signal will be +/- 3600Hz at the -3db point.This is 7200Hz.
Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message ----- From: <sbjohns...@aol.com> To: <amradio@mailman.qth.net> Sent: Wednesday, March 10, 2010 6:06 PM Subject: Re: [AMRadio] AM IARU Region 2 Bandplan > The alarming confusion expressed right here on the AMRADIO mailing list > regarding the occupied bandwidth of a DSB AM signal makes my point > beautifully. Most hams know what mode they are running, but few really > know the bandwidth of their signnal. > > Very few hams have the knowledge, skills, or test equipment to measure > occupied bandwidth anyway, so its use in a bandplan is a meaningless > standard. The common practice of tuning a communications receiver > across a signal is NOT how to measure occupied bandwidth and will > produce misleading results. > > Again, let me emphasize: the present IARU Region 2 bandplan's > bandwidth limitation of 2700 Hz refers to the amount of space used by > the signal on the band, not the range of audio used to modulate the > transmitter. Most DSB AM signals are going to use at least 6 kHz of > spectrum space - most more. > > > Steve WD8DAS > > sbjohns...@aol.com > http://www.wd8das.net/ > -------------------------------------------------------------------- > Radio is your best entertainment value. > -------------------------------------------------------------------- > > > > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio@mailman.qth.net > To unsubscribe, send an email to amradio-requ...@mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
