lower frequency wireless connection

is there any software available to allow me to use an alternative lower
frequency to provide a wireless link - such as 446Mhz? the reason i ask, is
that the two places i need to connect do not have LOS, and i cannot set up a
link, but walkie talkies on 446 have no proble bridging the two locations.
Any ideas?




---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.654 / Virus Database: 419 - Release Date: 06/04/2004

In article <c5ff29$kh8$(E-Mail Removed)>,
adrenalin <(E-Mail Removed)> wrote:
:is there any software available to allow me to use an alternative lower
:frequency to provide a wireless link - such as 446Mhz?

No, you need different hardware. For example, the antenna on your
equipment is going to be the wrong length.

It is potentially *possible* that you might find an obscure wireless
card and a way to change its output directly through software,
but it'd be a lot of work even after you modified the antenna.

:the reason i ask, is
:that the two places i need to connect do not have LOS, and i cannot set up a
:link, but walkie talkies on 446 have no proble bridging the two locations.
:Any ideas?

In the area you are in, is 446 MHz even licensed for data communications?
Regulations about what can be used for voice and what can be used for
data are usually pretty specific.

You might be able to find some 900 MHz wireless equipment for sale.
Your message id hints at a UK location; I don't recall if data is
allowed at 900 MHz in the UK?
--
The Knights Of The Lambda Calculus aren't dead --this is their normal form!

adrenalin wrote:

> is there any software available to allow me to use an alternative lower
> frequency to provide a wireless link - such as 446Mhz? the reason i ask,
> is that the two places i need to connect do not have LOS, and i cannot set
> up a link, but walkie talkies on 446 have no proble bridging the two
> locations. Any ideas?

Assuming you're talking about the 802.11 wireless, no. You cannot change
the frequency like that.

--

Fundamentalism is fundamentally wrong.

To reply to this message, replace everything to the left of "@" with
james.knott.

On Tue, 13 Apr 2004 02:16:36 +0100, "adrenalin" <(E-Mail Removed)>
wrote:

>is there any software available to allow me to use an alternative lower
>frequency to provide a wireless link - such as 446Mhz? the reason i ask, is
>that the two places i need to connect do not have LOS, and i cannot set up a
>link, but walkie talkies on 446 have no proble bridging the two locations.
>Any ideas?

Have a look at http://www.fab-corp.com/
Select "Up-Down Converters & Antennas" at the left.

Arne

---
I can be reached at:
<first name>.<last name (a for å)><at><charlie><two><india>.net

Thanks for the feedback! My problem is that I dont have LOS. However, my 1W
PMM 466MHz handheld radios work fine at the two locations (we use them for
talking to each other whilst trying to align the WLAN parabolic dishes)
These radios work very well, and it led me to think that it might be
possible to use this type of equipment for relaying the wireless LAN link
(maybe using the soundcard to relay the data). The lower frequency is much
more immune to trees and houses and stuff, whereas the higher frequency is
more directional and allows higher data throughput.

I am not really worried if the data rate suffered, however, I agree you are
probably right, that licence free speech bands might not be legal to use for
data. Its just an idea, but something I would like to experiment on


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.657 / Virus Database: 422 - Release Date: 14/04/2004

Hmm. Wonder if you could hook up ancient 1200 bps acoustic couplers to these
things? Oops - no, bet they're half-duplex (push-to-talk), right?

"adrenalin" <(E-Mail Removed)> wrote in message
news:c5klqc$jhs$(E-Mail Removed)...
> Thanks for the feedback! My problem is that I dont have LOS. However, my
1W
> PMM 466MHz handheld radios work fine at the two locations (we use them for
> talking to each other whilst trying to align the WLAN parabolic dishes)
> These radios work very well, and it led me to think that it might be
> possible to use this type of equipment for relaying the wireless LAN link
> (maybe using the soundcard to relay the data). The lower frequency is much
> more immune to trees and houses and stuff, whereas the higher frequency is
> more directional and allows higher data throughput.
>
> I am not really worried if the data rate suffered, however, I agree you
are
> probably right, that licence free speech bands might not be legal to use
for
> data. Its just an idea, but something I would like to experiment on
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.657 / Virus Database: 422 - Release Date: 14/04/2004
>
>

On Thu, 15 Apr 2004 01:42:33 +0100, "adrenalin" <(E-Mail Removed)>
wrote:

>Thanks for the feedback! My problem is that I dont have LOS.

According to the info on the FAB website you don't need LOS. That
sounds reasonable when comparing to 900 MHZ GSM used here in Europe,
which does not need LOS.

Arne

--
I can be reached at:
<first name>.<last name (a for å)><at><charlie><two><india>.net