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View Full Version : HD Radio Digital Hash Drains Out Your Hobby!


gccradioscience
04-08-2010, 09:09 PM
I have been doing AM DXing for a long time, too bad I did not get a chance to hear any AM stereo broadcasts. When this HD radio came over and started to go on the air, the white noise on AM really just causes fatigue. And because of that, I cannot receive any other stations and just dose off at night. To top it off, I bought an HD-100 affordable AM/FM radio and I wanted to receive some distant HD radio stations, but all the blue light does is flash, flash, flash and no signal. So if AM stations were digital only, AM radio will never be the same, it will be worse. We need analog radio still in the future. Cause of HD radio, it's taking the hobby of DXing away from the American people who have done it for years and reliable broadcast services, and wiping out popular clear channel AM stations we have known for years. It's like those shortwave radio jammers, but they are located on our AM broadcast band!
Boško Igić
04-09-2010, 06:57 AM
France Inter Radio on longwave (162 kHz) uses special tecnique to hide it`s time signal under AM signal. Why the US stations don`t use that tecnique to transmitt digital signal on medium-wave?
spunker88
04-09-2010, 09:33 AM
France Inter Radio on longwave (162 kHz) uses special tecnique to hide it`s time signal under AM signal. Why the US stations don`t use that tecnique to transmitt digital signal on medium-wave?

It probably has to do with bandwidth. The small amount of bandwidth required to send a time signal wouldnt be enough to send a digital signal. The digital signal requires a constant lock-in in order to work, where as the time signal can probably have many breaks in it and it will go unnoticed. Kind of like the EPG that goes along with DTV broadcasts. You can have a lousy signal with many breaks but the EPG data is usually received just fine and long as the signal was in long enough for it to download the data.
mrhoover
11-08-2010, 05:13 PM
France Inter Radio on longwave (162 kHz) uses special tecnique to hide it`s time signal under AM signal.

BBC Radio 4 on 198 KHz certainly used to do something similar,maybe still does...If you can receive it tune to SSB and see if the carrier is moving up and down a little bit.

Seems it still does...just found something about it on Wikipedia here !!

http://en.wikipedia.org/wiki/Radio_teleswitch

Hugh