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GM0CSZ > TECH 04.03.05 06:05l 33 Lines 1056 Bytes #999 (0) @ WW
BID : FB1876GM0CSZ
Read: GUEST
Subj: Re: FM Stereo Radio Principles 1/2
Path: DB0FHN<DB0MRW<DB0WUE<DK0WUE<7M3TJZ<IK1ZNW<GB7CRV<GB7FUR<GB7IOM<GB7SAN<
GB7INV<GB7NOS
Sent: 050301/1446Z @:GB7NOS.#76.GBR.EU #:27058 [Golspie] FBB7.00i $:FB1876GM0CS
From: GM0CSZ@GB7NOS.#76.GBR.EU
To : TECH@WW
G8MNY wrote:-
>
> The C.D. is the best source most people are familiar with, its frequency
> range is limited by the 44kHz sampling rate & the requirement to filter off
> all the frequencies higher than 22kHz to stop aliasing mixes caused by the
> sampling rate.
>
> Broadcast FM is limited to 15kHz to stop problems with the stereo pilot
> used.But 15Hz represent a good compromise for the upper limit which is > >
why it was chosen.
>
> Broadcast AM (EU) uses 9kHz ch spacing so in theory 4.5kHz should be the
> upper limit, but in practice 6kHz is the limit (7kHz -40dB) to make it
> sound better.
============================================
2 Questions :
What is the audio spectrum range of Digital Radio (DAB) as now available
in the UK ?
What is the bandwidth of 1 multiplexed group of DAB stations?
TIA for any response.
73 - Frank , GM0CSZ @ GB7NOS.#76.GBR.EU
Inver by Tain , IV20 1RX Scotland UK Loc: IO87AT
Message timed: 13:38 UTC on 01 Mar 2005
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