(Source: Radio Mag Online via Larry W)
The trial has demonstrated that there is no interference with analog stations on either side of the digital signal in the crowded FM spectrum of Johannesburg
JOHANNESBURG, South Africa — Johannes von Weyssenhoff, representing the community station Wecodec in Johannesburg, presented the case of DRM to an international audience at the “Radio Days Africa,” an annual event taking place at the Witwatersrand University in Johannesburg. His presentation also included results and findings of WECODEC’s ongoing DRM+ trial, the first of its kind on the African continent, according to DRM news.
The trial has demonstrated that there is no interference with analog stations on either side of the digital signal in the crowded FM spectrum of Johannesburg. The DRM power for the test is ¼ that of FM, giving similar coverage at 4QAM.[…]
Nice!!!! Now, the real big test would be for the American FCC to allow DRM+ tests with the monopolies that HD Radio now holds on FM broadcasting over here.
Let the FM band be as it is. FM modulation. DRM+ in band 47-68 MHz. DRM in the SW bands. Local DRM in the 11-m band. Mediumwave as it is = AM modulation. Place and space to 2 watts and up in low power.
btw. Johannes von Weyssenhoff was the main person behind the Starwaves DRM CarBox (C- 310-U): http://www.starwaves.de/truckbox.html
We reviewed this DRM receiver in Sender & Frequenzen edition 2008.
Johannes also was invoved in a tiny DRM test transmitter in Hannover on a 26 MHz years ago. Interesting to see that he still believes in DRM broadcasting.
I bought one of the starwaves car/truck box back in the day when BBC/DW did a dual broadcast…..it worked really well but packed in after a few months. Cost me about £250…..it had DAB which was a bonus…I think it used the radioscape module if memory serves me right.
We need DRM as standard in cars using something like the NXP chipset.
An AM/ FM reciever you can get for 5 – 10 USD, but a DRM recivers costs 50 – 100 USD or even more. A transmitter cost much more