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PA2AGA > HDDIG 10.06.00 03:56l 178 Lines 5951 Bytes #-9449 (0) @ EU
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From: PA2AGA@PI8HGL.#ZH1.NLD.EU
To : HDDIG@EU
Date: Sat, 10 Jun 00 00:10:37 MET
Message-Id: <hd_2000_160B>
From: pa2aga@pe1mvx.ampr.org
To: hd_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
> affected by lightning, leaving me with a sudden need for a temporary node
> computer.
>
> What I had available was an old Pentium 100 with Win98 installed on it,
> which is not the best deal. It's well known that the node version of
FlexNet
> (FlexDigi) will not work under any version of Windoze.
>
> Faced by the mother of invention, (necessity) I decided to try the Win98
> MsDos mode, and it worked fine. To keep the machine in MsDos mode through
> power fluctuations and the rebooting that follows, I first put the
computer
> in MsDos mode, then from the C:\ prompt, I formatted a 1.44MB system
floppy.
>
> Then I copied AUTOEXEC.BAT and CONFIG.SYS from the hard drive onto the
> floppy, eliminating commands needed for Windows, and for the CD-ROM drive.
> (The node doesn't use it) Mainly I wanted the PATH statement intact, and
to
> load HIMEM, etc.. While I'm using that computer to keep my node up, I'll
> just leave that floppy disk in the drive. When I get a replacement, I'll
> just yank out the floppy and let it go back to being a WinDoze computer
> again.
>
> - So I guess you can use a Win9x computer to run FlexDigi after all, just
as
> long as you don't actually run Windows!
>
> 73 DE Charles Brabham, N5PVL
>
------------------------------
Date: 8 Jun 2000 20:51:42 GMT
From: your@email.adr
Subject: Going out tonight, Have some fun this weekend - Whats on in your
state
I have just visited a site which lists events for each state and more
They are happy to accept any related URL details
http://www.btinternet.com/~brevity/events365/main.htm
------------------------------
Date: Thu, 08 Jun 2000 09:38:47 -0500
From: Michael Grigoni <msg@computerpro.com>
Subject: HELP PLSE: 2.4GHZ WLAN Antenna matching
Joe Leikhim wrote:
>
> I am having trouble visualizing all this. But I would make a strong bet
> that the filter and the antenna switch are 50 ohm impedence. I would guess
> the multiple feedpoints represent a diversity receive antenna
> configuartion.
Thanks for your reply. Are you suggesting perhaps that the two
feedpoints represent polarization selection? (There is only one
antenna, mounted directly above the groundplane of the rf board,
separated by the foam dielectric.
> A common technique is to duplex the transmitter and
> receiver on one antenna and provide a second receive antenna for
> diversity. The radio logic selects the antenna which produce the best bit
> error rate. In this case the second TR switch may be in lieu of a
> duplexer which is not always provided in a digital radio.
Indeed, the second TR switch would then serve the traditional function
if it feed the polarization selection network.
Why do you suppose the filter elements are different in each leg of
the matching network if they are used in the above scenario?
Would one need to combine the outputs to drive a single antenna, or
just pick one and hope the radio's BER logic will deal with it?
> Hope this helps.
>
BTW, does anyone have suggestions for Motorola personnel contacts?
Michael Grigoni
Cybertheque Museum
------------------------------
Date: Thu, 8 Jun 2000 21:07:49 -0500
From: "Robert" <rshprd@ibm.net>
Subject: HELP PLSE: 2.4GHZ WLAN Antenna matching
My first question is what brand of WLAN are you using that has internal/pc
board antennas?
The impedance is typically 50 ohms and yes, one antenna is TX/RX with the
other RX only for diversity.
However, you should know that messing with any of the factory configurations
at 2.4 technically violates type acceptance, not to mention the RF circuity
on these devices is somewhat touchy when it comes to modification. Even the
smallest of wiring errors or poor soldering can degrade the performance.
Good luck in any case. FCC max EIRP is +30dBm, which can cover a fairly
respectable distance with the right setup.
Joe Leikhim <jleikhim@nettally.com> wrote in message
news:393C704C.C5E38E88@nettally.com...
> I am having trouble visualizing all this. But I would make a strong bet
> that the filter and the antenna switch are 50 ohm impedence. I would guess
> the multiple feedpoints represent a diversity receive antenna
> configuartion. A common technique is to duplex the transmitter and
> receiver on one antenna and provide a second receive antenna for
> diversity. The radio logic selects the antenna which produce the best bit
> error rate. In this case the second TR switch may be in lieu of a
> duplexer which is not always provided in a digital radio. Hope this helps.
>
> Michael Grigoni wrote:
>
> > Hello All!
> >
> > We need advice and opinions on building a matching network to convert
> > wireless lan transceivers from internal patch antennas to external
> > ~50ohm N-connector antenna feeds. (snip)
>
> --
> Joe Leikhim K4SAT
> Jleikhim@nettally.com
>
> "tv dinner by the pool,
> i'm so glad i finished school" -F.Zappa 1967
>
> "The Revolution will NOT be televised" -Gil Scott Heron
>
> Dopeler effect: The tendency of stupid ideas to seem smarter when they
> come
> at you rapidly.
>
>
------------------------------
Date: Thu, 08 Jun 2000 23:32:46 -0600
From: Tate <73KC7ZRU73@cyberhighway.net>
Subject: SV2AGW web site
http://www.elcom.gr/sv2agw/inst.htm
2pat wrote:
>
> Hi, where has SV2AGW's web site gone to?
--
KC7ZRU | In Laramie Area
Laramie, WY | UARC Repeater
DN71eh | 146.610
"The Dungeon" online at http://www.cyberhighway.net/~tateb
Remove 73s from addy to send email
------------------------------
End of Ham-Digital Digest V2000 #160
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