Hi Jim,
You really must be making a tongue in check joking reply here, that
is the only way that I can take such a reply as the Amateur Radio
bands have been broken down into specific use for decades and ever
changing. I can NOT go down to 14.004Mhz and make a SSB contact as it
is dedicated
Let me point out that you are not talking about co-channel
interference to your signal. You are discussing interference to your
ability to use the spectrum. Two entirely different subjects.
Using your example, there is only one lane and that is all there will
ever be, just like the amateur
I was not claiming that SCAMP *did* violate; I just had no information.
Given that SCAMP didn't directly link to or modify any GPL code, the
following is slightly off-topic...
By the way, a very good resource for what the GPL *really* does and
does not mean is at http://www.gnu.org/licenses/ .
My comments are interspersed.
On 9/18/07, Rick [EMAIL PROTECTED] wrote:
My comments interspersed with Mr. Thompsons
- - - - -
The complete SCAMP specification is available and will be released under
the GPL as a blueprint for client developers to insure compatibility
across different
To the best of my recollection, any signals within the passband would
prevent a transmission. Even fleeting ones like voice SSB, but it was
not as affected by wide band noise as much, even static crashes. I don't
know if it was more than what you ask, but I will say that most
reasonable hams
I'm glad to hear that. It sounds like it's implemented the obvious
way, and thus should be very easy to duplicate. I'll try to set up a
test harness and see whether I can duplicate its functionality.
If I do, I'll report success here.
On 9/19/07, Rick [EMAIL PROTECTED] wrote:
To the best of my
AA6YQ comments below
--- In digitalradio@yahoogroups.com, Robert Thompson
[EMAIL PROTECTED] wrote:
snip
The issue is that if a human is involved, at worst everyone shrugs and
figures he's an impolite operator.
If a human is involved one can send the frequency is in use,
please QSY. Most of
I think the basic ALE multitone waveform is always x3, although there
are others much more expert than I on this list. Note that if FEC is
being used, the 375 bps would be the raw rate, not the end-to-end
throughput rate.
On 9/19/07, Demetre SV1UY [EMAIL PROTECTED] wrote:
--- In
--- In digitalradio@yahoogroups.com, Robert Thompson
[EMAIL PROTECTED] wrote:
I think the basic ALE multitone waveform is always x3, although there
are others much more expert than I on this list. Note that if FEC is
being used, the 375 bps would be the raw rate, not the end-to-end
throughput
Hi Patrick and Demeter.
Is it possible to do the test later Thursday evening? I have to take care of
some personal business.
I will be Qrv from 1830 UTC Thursday.
73 de LA5VNA Steinar
Patrick Lindecker skrev:
Hello Steinar and Demeter,
I will call CQ ARQ FAE Thursday evening at
Hello Demeter,
At the end of this message you have the main data for ARQ FAE.
As you can see for a rough speed of 184 wpm (corresponding to 147 bits/sec from
an initial theoritical speed of 375 bits/sec) you have a useful speed (due to
acknowlegments) of only 125 wpm in unilateral (equivalent
The 8FSK125 mode is quite an old mode now and from what I have been
reading, commercial/government will eventually move away from that
particular waveform in order to standardize on the other newer designs.
Because it has one tone that frequency shifts to 8 locations at the rate
of 125 baud so
Hello Steinar,
OK for 18h30 to 19h00 UTC to-morrow evening.
Note: you must have a stable frequency to avoid drift (in ALE you are supposed
to have a fixed frequency), so one hour of working before the QSO will be good.
73
Patrick
- Original Message -
From: Steinar Aanesland
Depends; Shannon's theorem gives three variables: bitrate, modulation
width, minimum workable noise level. You can get extreme bitrates in
narrow channels, but only if you're willing to accept really large
minimum SNRs.
There is a pretty good paper that analyzes BPL in terms of the Shannon
Hello Steinar,
OK for 18h30 to 19h00 UTC to-morrow evening.
Note: you must have a stable frequency to avoid drift (in ALE you are
supposed
to have a fixed frequency), so one hour of working before the QSO will be ?
good.
73
Patrick
Hi Patrick and Steinar,
OK about the test today Thursday
Demetre,
I am adding some material on Shannon-Hartley to The Ham Network Wiki
(http://thehamnetwork.net/wiki/#Shannon-Hartley). I have been working
the formula in Excel by duplicating the charts from my bibliography
references. Based on that work I am pretty confident in saying that to
attain
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