Re: [Swprograms] Interesting DRMwrinkle:Synchronizedsingle-frequency transmitters (Deutsche Welle)

["rmonty23" <rmonty23@xxxxxxxxxxx>]

I have to wonder if DRM will ever take off.  Last week I noted an advert on 
TV with a gent using a hand held portable XM rcvr with ear plugs.  This 
appeared to be like a typical portable radio for am-fm.  No mention of 
price.  I have to think if DRM is to succeed now, they will need the price 
to be dirt cheap and one heck of an advert campaign to get it off the 
ground.  However, as an owner of a Sirius rcvr, I have to wonder how well 
the XM portable unit works.  Strictly an outside toy as seen in the advert.

As I tune the bands I can hear the hash from the DRM broadcasters and wonder 
how many can actually hear them.  Most likely only a very few and wonder why 
they bother.

I still think DRM will go the way of a.m. stereo.

Bob Montgomery
----- Original Message ----- 
From: "Mike Wolfson" <mwolfson@xxxxxxxxxx>
To: "Shortwave programming discussion" <swprograms@xxxxxxxxxxxxxxxx>
Sent: Thursday, September 15, 2005 9:44 AM
Subject: Re: [Swprograms] Interesting 
DRMwrinkle:Synchronizedsingle-frequency transmitters (Deutsche Welle)


>I agree with one of Rich's comments.  I thought DRM was supposed to be more
> efficient powerwise.  How does using multiple transmitters save power or
> make things simpler.
>
> This thread reminded me of a couple of articles that I read about digital
> TV.  After testing digital TV  technology, they found that either 
> repeaters
> or multiple transmitters would be needed to cover the same service area as
> the current analog signal.  I don't have a source for this information. 
> Has
> anyone heard anything similar ?
>
> Mike
>
> ----- Original Message ----- 
> From: "Scott Royall" <royall@xxxxxxxxxxxx>
> To: <rdcuff@xxxxxxxxx>; "'Shortwave programming discussion'"
> <swprograms@xxxxxxxxxxxxxxxx>
> Sent: Wednesday, September 14, 2005 10:24 PM
> Subject: Re: [Swprograms] Interesting DRM
> wrinkle:Synchronizedsingle-frequency transmitters (Deutsche Welle)
>
>
>>I also agree, and I think DRM will be irrelevant until that is cheaply
>> available.
>>
>> -----Original Message-----
>> From: swprograms-bounces@xxxxxxxxxxxxxxxx
>> [mailto:swprograms-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Richard Cuff
>> Sent: Wednesday, September 14, 2005 9:15 PM
>> To: softbulletin1@xxxxxxxxx; Shortwave programming discussion
>> Subject: Re: [Swprograms] Interesting DRM wrinkle:
>> Synchronizedsingle-frequency transmitters (Deutsche Welle)
>>
>> I agree - and told the DRM guys at the SWL Fest that the system needed
>> to be "intelligent" if it was truly to be mass market-worthy.  In
>> other words, the receiver would employ diversity reception or other
>> techniques to assemble a clean signal from multiple parts or to seek
>> alternate frequencies.
>>
>> We are several years away from that however.
>>
>> Richard
>>
>> On 9/14/05, Mike Barraclough <softbulletin1@xxxxxxxxx> wrote:
>>>
>>>
>>>
>>> The other requirement DRM needs is some form of
>>> monitoring system so that the bandwidth and robustness
>>> of the system can be altered at times of unfavourable
>>> propagation, albeit at the expense of audio quality.
>>>
>>
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>
>
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