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WORLDWIDE DX CLUB Weekly Top News

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Answer. Yes with receiver, computer and software.<br />

2. "And in case that your answer is yes: again, in case your answer is<br />

yes, give your impressions about those DRM broadcasts regarding quality<br />

and reliability of reception."<br />

Terrible and useless. Broadcast was Radio Sweden via Sackville, Canada. So<br />

many dropouts and signal not locking that program was useless. Analog<br />

signal from Sackville, Canada is usually very strong.<br />

As we know a digital signal is either received or not. There is nothing in<br />

between. We need a new Q code for DRM. I propose QRD (as in crud. Crud is<br />

English slang for rubbish). DRM also causes hash to analog broadcasts<br />

making analog broadcasts often useless. Unsure how people will receive DRM<br />

broadcasts without affordable receivers.<br />

And he continues by making a comment that I fully agree with, regarding<br />

the present use of DRM transmissions<br />

If DRM continues, specific out-of-band frequencies should only be used for<br />

DRM. Signed Kraig, from Virginia<br />

Another answer to the DRM poll came from the United Kingdom, where<br />

listener Alan has experimented with a very expensive commercial version of<br />

a receiver that is advertised as fully DRM capable. Alan says that he has<br />

very carefully evaluated DRM reception from different transmitting<br />

stations, and notice he makes a very good reference to transmitting<br />

stations, and not to the program source, something that speaks highly<br />

about the excellent analytical job Alan has done for more than a year now.<br />

He comes forward with a one sentence opinion that I fully endorse:<br />

Arnie, DRM, Digital Radio Mondiale, is doomed to failure, because it the<br />

technology is simply not good for short wave broadcasting applications.<br />

The dropouts, those black holes during the reception of DRM broadcasts are<br />

horrible, making the reception of stations using DRM very annoying to say<br />

the least.<br />

Now more about DRM, its problems, difficulties and its very bad impact on<br />

analog short wave broadcasts that are operating legally near the<br />

frequencies of the DRM transmissions that are generating so much unwanted<br />

interference, that is certainly producing a lot of problems on the<br />

international high frequency broadcast bands where DRM transmission are<br />

taking place on frequencies adjacent to analog broadcasts.<br />

According to several senior broadcast engineers that yours truly has asked<br />

for opinions about DRM, the problems of this technology are divided into<br />

three main areas:<br />

One: the technical characteristics of the transmitter used for DRM and how<br />

the actual DRM signal to be broadcast is adjusted to comply with the<br />

bandwidth regulation in effect on the HF bands<br />

Two: The lack of "memory", that is according to one of Cuba's most<br />

prominent broadcast engineers and university telecommunications<br />

engineering professor Jorge Inclan Artze, who unfortunately passed away<br />

recently, the DRM technology is fundamentally wrong for short wave<br />

broadcasting, because those who designed it, according to Inclan and I<br />

quote from my notes of an interview about this topic "they simply forgot<br />

that short wave propagation via the ionosphere is totally different from<br />

the ground wave propagation used by daytime AM broadcast band and FM<br />

broadcast band stations."<br />

And Inclan added that the basic idea of digital broadcasting is good, but<br />

that it must be combined with sophisticated computer hardware and software

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