If Tom's correct, HD output is only about 3% of a station's regular analog transmitter power... if Barry's right, then it's closer to 6%. Either way, it's not surprising that it takes so much RF to trigger the HD digital audio... and why none of us has been able to pull out digital audio from skywave. I know I have yet to hear it on any skywave signal, though the call letters & other text info often comes through okay. KFAB-1110 is ALMOST strong enough here at SSS before their pattern change for the audio to switch over, but not quite... at least, not yet. (As I've mentioned before, I have one of my station's Boston Acoustics HD radios at home.)
Randy Stewart Springfield MO (ORIGINAL MESSAGE) Date: Tue, 9 Jan 2007 22:34:15 -0500 From: Barry McLarnon <[EMAIL PROTECTED]> Subject: Re: [IRCA] [NRC-AM] "HD" DX? On Tuesday 09 January 2007 20:21, Tom Ray wrote: > At 50KW, the average power is about 1,500 Watts. You're about 3 dB down there, Tom - according to the iBiquity specs, a 50 kW station would have an average digital power of about 2940 Watts. See http://topazdesigns.com/iboc/AM-IBOC-Parameters.html for the gory details. _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
