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echo: scanners
to: MICHAEL BLACK
from: MARTIN NIEMEYER
date: 1996-08-20 18:44:00
subject: WinRadio Coming!

On (17 Aug 96) Michael Black wrote to All...
 MB> I haven't seen this product so I can't say whether this applies to
 MB> this product or not, but here goes.
 MB> So this WinRadio plugs right into the bus of a computer.  It's not
 MB> near the computer, it's not next to the computer, it's right inside.
 MB> If the thing is not extremely shielded, it might not work so well
 MB> in the environment.  Worse than the act of holding a scanner too
 MB> close to the computer (as someone was having a problem with last
 MB> month), the radio runs off the power supply of the computer.
 MB> All the switching transients can come directly to the receiver
 MB> board instead of having to pick them up  through radiation.
 MB> Even if the board is extremely well shielded, and the power supply
 MB> lines are extremely well filtered, you still have to connect
 MB> the receiver to the outside world, via coax to the antenna.
 MB> And that coax has to run out of the computer, presumably near
 MB> the computing equipment for a while, before it even reaches
 MB> the actual antenna.  ANother big chance to pick up noise from
 MB> the computer.
 MB> SO this is something to watch for when considering buying
 MB> any radio that plugs into the expansion bus of a computer.  The
 MB> idea may be neat and tidy, but that doesn't mean that it's
 MB> a perfectly good idea.
I would agree with you if I hadn't seen TV and AM\FM Radio cards
inside IBM computers work perfectly fine without any interference. I
don't know what they used for an antenna but you can be sure it
wasn't internal.
Martin
... To us, a bee is a pain.  To a flower it's Don Juan!
--- PPoint 2.00
---------------
* Origin: The PROUD owner of a Radio Shack PRO-39 (1:105/40.39)

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