Re: BBC FM networks borked

In article <VA.0000004a.00f266e1@xxxxxxxxxxxxxxxxxxxxxx>,
Roderick Stewart <escapetime@xxxxxxxxxxxxxxxxxxxxxx> wrote:
In article <4f111a69d0charles@xxxxxxxxxxxxxxxxxxxxxxx>, Charles wrote:
Question, to which I don't know the answer, but is worth thing about?
Is this high power consumption inherently a function of DAB, or is it
simply because set manufacturers are using a crude way of decoding the
signals? Remember mobile phones that came with a battery the size of a
house brick?

Considering that a conventional AM or FM receiver can be made with less
than a dozen transistors but anything involving digital processing needs
the equivalent of thousands *in addition* to the RF, IF and audio stages
that any receiver must have anyway, I don't see how it can ever be
possible to reduce the power consumption to match. A "digital receiver"
is in effect an analogue receiver with some extra circuitry, and rather
complicated circuitry at that.

I agree that there will be a higher power drain, but does it need to be as
high as it is at the moment? Mobile phone technology, even with a digital
system, has reduced the power consumption considerably in that field.
Decoders for Ceefax - in the early days - used 10s of discrete chips with a
power consumption measured in amps. Dedicated ics brought the power
consumption right down.

--
From KT24 - in "Leafy Surrey"

Using a RISC OS computer running v5.11

.

Relevant Pages

  • Re: BBC FM networks borked
    ... this high power consumption inherently a function of DAB, ... Considering that a conventional AM or FM receiver can be made with less than ... a dozen transistors but anything involving digital processing needs the ... analogue receiver with some extra circuitry, ...
    (uk.tech.broadcast)
  • Re: Superb example of Croiset lying
    ... So verifying the power consumption of a DAB receiver is a good start, ... No, because the display, RS decoder and video decoder are not there on a DAB ... you can ignore it because on BOTH technologies (T-DMB and DVB-H), ...
    (alt.radio.digital)