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Orinoco USB vs Dell TrueMobile 1300 mini-PCI for picking up weak signal?..

 
 
Leo Alekseyev
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      02-29-2004, 05:26 PM
I have a laptop with Dell's TrueMobile 1300 mini-PCI wireless card.
The signal that I'm trying to pick up is very weak, and I am often
losing connection. Thinking that an external antenna might help, I
picked up a YDI Diamond USB adapters with an external pigtail on eBay
(http://www.ydi.com/products/diamond-usb.php), as well as a cAntenna.
Inside the USB adapter sits the Orinoco Gold PCMCIA card.

The results have been disappointing: without the antenna, the USB
adapter is pretty much useless. Even in the areas where I get full
signal with the internal card, the USB adapter shows signal as "good"
to "low". Where the internal card sees low signal, the USB adapter
doesn't even see the network. Connecting the cantenna makes the USB
connect to the network, but the signal is unusable; way worse than the
one with the internal card.

The question is - what do I conclude from this?.. Would I get
similarly bad results with any antenna/USB adapter combo? Is there
something funny with the USB adapter (after all, I picked it up for
$25 on eBay while on the website above it retails for $150)?..

Hope to hear your opinions...

--l
 
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=?ISO-8859-1?Q?Valent=EDn_Guill=E9n?=
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      02-29-2004, 07:20 PM
Leo Alekseyev wrote:

> Hope to hear your opinions...


Without having more info to go on, it's difficult to guess what the
issue might be. The configuration manager software which comes with the
standard "windoz" releases packaged with most kit are next to useless
for diagnosing any problems you might have.

Attempt to locate and obtain some form of diagnostic software which
might assist you in determining what conditions your signals are
experiencing. At the very least, you need to know the signal strengths
of both the RF signals and the associated noise factor, so you can then
know what the signal-to-noise ratio is. Most client managers merely
indicate with some sort of bar-graph what the *relative* rf signal
strength is. That info, by itself, is almost useless.

http://www.thuntek.net/~vguillen/art/stats.png is an example of what
sort of data we're talking about. But even this data on its own is
limited. Obtaining other data, as in this konsole screen shot,
http://www.thuntek.net/~vguillen/art/konsole.png is helpful because it
allows one to know about things like packet transmission retries, etc.
When coupled with the standard data display, like this
http://www.thuntek.net/~vguillen/art/kwifi.png
http://www.thuntek.net/~vguillen/art/kwifi1.png and this
http://www.thuntek.net/~vguillen/art/desktop you can then begin to get
an idea about what your connection/attempted connection is all about.

If you're a windoz user, I'm sure there must be some kind of software
out there, perhaps like Network Stumbler, which might allow you to
obtain this info. There is so much more to signal analysis than mere
signal strength when attempting to diagnose connection problems, and by
and large, the default info given to you on windoz boxes is severely
restricted.

If you're able to obtain more data about your system, then perhaps we
could collectively better assist you here with your issues.....:-)

vg



 
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dold@OrinocoXUS.usenet.us.com
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      02-29-2004, 08:14 PM
Leo Alekseyev <(E-Mail Removed)> wrote:
> I have a laptop with Dell's TrueMobile 1300 mini-PCI wireless card.

....
> (http://www.ydi.com/products/diamond-usb.php), as well as a cAntenna.
> Inside the USB adapter sits the Orinoco Gold PCMCIA card.


> The results have been disappointing: without the antenna, the USB
> adapter is pretty much useless. Even in the areas where I get full


The spec sheet makes that fairly clear. It even comes with a cable, and
the "typical installation" shows it attached to a flat panel antenna.

> signal with the internal card, the USB adapter shows signal as "good"
> to "low". Where the internal card sees low signal, the USB adapter
> doesn't even see the network. Connecting the cantenna makes the USB
> connect to the network, but the signal is unusable; way worse than the
> one with the internal card.


How do you know that the USB card is an Orinoco? The client manager
downloadable from the site is Agere, and that is one of the various names
that may be applied to an Orinoco card.

As another poster indicated, you should use a real client manager to look
at the signal levels. You don't say what you are using. Are you sure you
are looking at the USB signal? The Dell TrueMobile is probably an Orinoco
as well.

It would be handy to know the FCC ID of each of the cards, as that allows
better identification than the various OEM names that get applied.

> The question is - what do I conclude from this?.. Would I get
> similarly bad results with any antenna/USB adapter combo? Is there
> something funny with the USB adapter (after all, I picked it up for
> $25 on eBay while on the website above it retails for $150)?..


It looks like it requires an external antenna. Other than that, I would
expect the card inside to work like an Orinoco card, one of the better ones
in terms of sensitivity.

--
---
Clarence A Dold - Hidden Valley (Lake County) CA USA 38.8-122.5

 
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Martin²
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      02-29-2004, 11:47 PM
I have replaced my Orinoco PC card with Orinoco USB adapter which I placed
on a window sill to receive signal from another building 75m away. Works
100%.
Regards,
Martin


 
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William Browning
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      03-01-2004, 01:08 AM

<(E-Mail Removed)> wrote in message
news:c1tkn1$j9$(E-Mail Removed)...
> Leo Alekseyev <(E-Mail Removed)> wrote:
> > I have a laptop with Dell's TrueMobile 1300 mini-PCI wireless card.

> ...
>
> As another poster indicated, you should use a real client manager to look
> at the signal levels. You don't say what you are using. Are you sure you
> are looking at the USB signal? The Dell TrueMobile is probably an Orinoco
> as well.


The Truemobile is a Broadcom device.


 
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dold@OrinocoXUS.usenet.us.com
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      03-01-2004, 03:07 AM
William Browning <(E-Mail Removed)> wrote:

> <(E-Mail Removed)> wrote in message
> news:c1tkn1$j9$(E-Mail Removed)...
>> Leo Alekseyev <(E-Mail Removed)> wrote:
>> > I have a laptop with Dell's TrueMobile 1300 mini-PCI wireless card.

>> ...
>>
>> As another poster indicated, you should use a real client manager to look
>> at the signal levels. You don't say what you are using. Are you sure you
>> are looking at the USB signal? The Dell TrueMobile is probably an Orinoco
>> as well.


> The Truemobile is a Broadcom device.


That appears to be true in this case, but that is too short of a statement.
There are certainly models of "TrueMobile XXXX" that are Orinoco.
The 1150 is an Orinoco Gold, but I see thats not for sale anymore.
The 1300 at least uses a Broadcom chipset, according to the Linux driver,
but you still need the FCCID to be sure who built it.

--
---
Clarence A Dold - Hidden Valley (Lake County) CA USA 38.8-122.5

 
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