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 [email protected] 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/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] 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
