[BC] DRM?

[Andy Green Listservers]

I should also add that the sound changes slightly depending on which mode it 
is running in - there are several different modes which can trade robustness 
for data rate, it has a different number of QAM carriers, 16 as opposed to 
32 or 64 (from memory).
The sound you describe , that of a garden 'Strimmer' on steroids is almost 
certainly DRM

Andy
----- Original Message ----- 
From: "Andy Green (Listservers)" <andyglist at totalbroadcast.net>
To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
Sent: Thursday, February 09, 2006 9:40 AM
Subject: Re: [BC] DRM?


> Not sure if it will sound different on a product detector, but on an 
> envelope detector, it sounds like white noise - a raucous hiss. There are 
> a few stations in this part of the world (such as Luxembourg and BBC world 
> service) on the AM band for part of the day and night with DRM
>
> Andy Green
>
> Total Broadcast Consultants Ltd.,
> U8F, City Enterprise Centre,
> Waterford Business Park,
> Cork Road,
> Waterford City,
> Ireland.
> Mobile: +353 87 6169222
> Tel: +353 51 845 422
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> ----- Original Message ----- 
> From: "Gary Peterson" <kzerocx at rapidcity.net>
> To: <broadcast at radiolists.net>
> Sent: Wednesday, February 08, 2006 9:29 PM
> Subject: [BC] DRM?
>
>
>> I've not been able to find the answer to my question elsewhere, so I am
>> coming to one of the best sources of collective knowlege, about radio, 
>> that
>> I am aware of.
>>
>> On weekends, I have been noticing a broad signal around 7160 kHz that 
>> sounds
>> like a string-trimmer on steroids.  This frequency is often used by
>> international shortwave broadcast stations.  I'm wondering if there is a
>> station running DRM or if this is just a jammer.  Can anyone tell me what 
>> a
>> DRM signal sounds like on a product detector?  All I have been able to 
>> find
>> are audio files of properly demodulated DRM.
>>
>> Thanks for any replies.  I'm very curious.
>>
>> Gary, K?CX
>>
>>
>>
>>
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>
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