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PA2AGA > PACDIG 22.06.00 03:28l 185 Lines 6254 Bytes #-9411 (0) @ EU
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Date: Wed, 21 Jun 00 18:53:00 MET
Message-Id: <pr_2000_156A>
From: pa2aga@pe1mvx.ampr.org
To: pr_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
Packet-Radio Digest Tue, 20 Jun 2000 Volume 2000 : Issue 156
Today's Topics:
AGW PE doesn't work well for Soundcard packet, right? (5 msgs)
amateur radio website
normal modem for packet (2 msgs)
Soundcard vs. Baycom vs. TNC (3 msgs)
Windows 98 y tnc KAM-Plus
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We trust that readers are intelligent enough to realize that all text
herein consists of personal comments and does not represent the official
policies or positions of any party. Your mileage may vary. So there.
Loop-Detect: Packet-Radio:2000/156
----------------------------------------------------------------------
Date: Mon, 19 Jun 2000 08:18:51 -0700
From: PreCool <precoolNOprSPAM@email.com.invalid>
Subject: AGW PE doesn't work well for Soundcard packet, right?
That "could" was supposed to be a "choose" reading......
One might CHOOSE not to use the soundcard for packet instead of
regular audio.
Meaning, to each his own.
Got questions? Get answers over the phone at Keen.com.
Up to 100 minutes free!
http://www.keen.com
------------------------------
Date: Mon, 19 Jun 2000 08:08:11 -0700
From: PreCool <precoolNOprSPAM@email.com.invalid>
Subject: AGW PE doesn't work well for Soundcard packet, right?
Roger Barker <roger@peaksys.co.uk> wrote:
>By choice I wouldn't use it. The ability to decode frames is not
>as good as with a TNC or a Baycom modem (that applies to both
AGWPE and
>Flexnet), and I'd rather use my sound card for other purposes.
>
>
I've noticed AGW works much slower than FlexNet. How do you know
FlexNet decodes less good than a Baycom type modem or TNC.
Good point though. One might could not to use the soundcard for
packet instead of regular audio.
I think I've been clear on what hardware I'm running.
Got questions? Get answers over the phone at Keen.com.
Up to 100 minutes free!
http://www.keen.com
------------------------------
Date: Mon, 19 Jun 2000 19:40:26 +0100
From: Roger Barker <roger@peaksys.co.uk>
Subject: AGW PE doesn't work well for Soundcard packet, right?
In article <1eb770f8.7fd47cd6@usw-ex0104-026.remarq.com>, PreCool
<precoolNOprSPAM@email.com.invalid> writes
>Roger Barker <roger@peaksys.co.uk> wrote:
>
>>By choice I wouldn't use it. The ability to decode frames is not
>>as good as with a TNC or a Baycom modem (that applies to both
>AGWPE and
>>Flexnet), and I'd rather use my sound card for other purposes.
>>
>>
>I've noticed AGW works much slower than FlexNet. How do you know
>FlexNet decodes less good than a Baycom type modem or TNC.
Simple, as a test I simultaneously input the same audio into a Tiny-2
TNC and into the sound card. I've done it with both AGWPE and with
Flexnet. There's no comparison - the TNC will consistently decode far
more packets than does the sound card, and is far less fussy about the
audio level. Where does a Baycom modem come into it? The Tiny-2 uses the
same modem chip as a Baycom (TCM3105), and so the performance is very
comparable, assuming that your PC is capable of properly handling a
Baycom modem, which some aren't.
>Good point though. One might could not to use the soundcard for
>packet instead of regular audio.
>
>I think I've been clear on what hardware I'm running.
Sorry, but I must have missed it. I remember someone saying they were
using a Yamaha sound card, was that you?
--
Roger Barker, G4IDE - roger@peaksys.co.uk
For UI-View go to - http://www.packetradio.org.uk
For WinPack go to - http://www.peaksys.co.uk
------------------------------
Date: Mon, 19 Jun 2000 23:26:38 -0700
From: PreCool <precoolNOprSPAM@email.com.invalid>
Subject: AGW PE doesn't work well for Soundcard packet, right?
So why are some PC's not capable of using a Baycom type
interface exactly?
Got questions? Get answers over the phone at Keen.com.
Up to 100 minutes free!
http://www.keen.com
------------------------------
Date: Tue, 20 Jun 2000 09:33:07 +0100
From: Roger Barker <roger@peaksys.co.uk>
Subject: AGW PE doesn't work well for Soundcard packet, right?
In article <38aea093.9883b822@usw-ex0102-084.remarq.com>, PreCool
<precoolNOprSPAM@email.com.invalid> writes
>So why are some PC's not capable of using a Baycom type
>interface exactly?
Three main reasons:-
1. Don't see the change in state of the CTS line. Only happens with
modems that copy the original Baycom design which didn't have a
transistor on the CTS output, but a lot of those are in use in the UK.
It's easy enough to mod the modem and add the transistor.
2. Can't source enough current on the handshaking lines to power it.
3. To work properly, a Baycom modem driver requires a low and consistent
interrupt latency. In DOS that's not a problem, but in Windows it can
be. In particular, some poorly written hardware device drivers will
disable interrupts for long enough to cause problems. Even if the Baycom
driver is running at Ring 0 (a VXD), this can still cause a problem.
Graphics card drivers are the worst culprits, the original driver for
the Matrox Millennium graphics card, if used with PCI bus mastering
enabled, was a good example.
--
Roger Barker, G4IDE - roger@peaksys.co.uk
For UI-View go to - http://www.packetradio.org.uk
For WinPack go to - http://www.peaksys.co.uk
------------------------------
Date: Sun, 18 Jun 2000 09:06:15 GMT
From: bri1@btinternet.com (brian smith)
Subject: amateur radio website
Hi !
My website offers a bunch of stuff for radio amateurs:
Great Circle Map Software.
Microphone Amplifier Circuit
Audio Amplifier Circuit.
Aerial Circuits .. 2, 6 and 160 metres.
Links to Ham Radio Software.
Slow Scan TeleVision Diagrams and Software.
Data Modes Guide ( now a free download )
To be continued in digest: pr_2000_156B
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