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Christian Pernegger
2005-03-09, 02:55
I'll definitly be getting a SB2 any moment now, for it fixes all of the
little qualms I might have had with the SB1 hardware. I can't decide which
version to get, though. The wireless version is finally compatible with my
existing wireless network, but on the other hand I already have a dedicated
bridge for my wired one so I could use that again.

Question: Are there any disadvantages in having the radio and one antenna
internal? I'm thinking interference, added noise in the analog stages ...

C.

seanadams
2005-03-09, 03:14
Christian,

If you're on the fence, and the $50 price delta is not a huge concern,
definitely go for the wireless model.

Even if you don't need it now, your setup might change later. The
built-in wireless interface is certainly much easier to set up, and
more elegant that hooking up a separate 801.11g bridge.

Anyway to answer your question, there is no significant interference in
terms of audio performance from the wireless radio. In SB2 all of the
CPU/memory/radio components are mounted on their own circuit board, and
use their own separate power supply.

Sean

On Mar 9, 2005, at 1:55 AM, Christian Pernegger wrote:

> I'll definitly be getting a SB2 any moment now, for it fixes all of
> the little qualms I might have had with the SB1 hardware. I can't
> decide which version to get, though. The wireless version is finally
> compatible with my existing wireless network, but on the other hand I
> already have a dedicated bridge for my wired one so I could use that
> again.
>
> Question: Are there any disadvantages in having the radio and one
> antenna internal? I'm thinking interference, added noise in the
> analog stages ...
>
> C.
>
>
>

Phil Karn
2005-03-09, 20:17
Christian Pernegger wrote:

> Question: Are there any disadvantages in having the radio and one
> antenna internal? I'm thinking interference, added noise in the analog
> stages ...

Probably very little, if any. Spurious noise from computing equipment is
generally strongest at the lowest frequencies, and it falls off fairly
rapidly in intensity the higher you go. That's why you tend to have so
much more trouble with AM radio interference (~1 MHz) than FM (~100 MHz).

802.11 operates on the 2400 MHz band, which is high enough for most
computing equipment to generate relatively little noise. Even high-end
CPUs like Pentium 4s and Athlons with clock speeds in the multi-GHz
region confine signals at those frequencies to inside the chip; the
external interfaces to memory and peripherals that can radiate
interference run at slower speeds, e.g., 800 MHz or 1 GHz. Harmonics can
certainly exist at higher frequencies, but they probably won't be all
that strong.

The biggest source of radio frequency noise from Squeezeboxes has been
the little power supplies that they bundle with them. Slimdevices ought
to return them for a refund and use a cleaner model. Quite a few people
are now complaining that they can't listen to an AM radio anywhere in a
house that has a Squeezebox.

Phil