SDR1000 AGC
During my time as a ham I have spend a lot of time working on AGC systems. I
tend to be rather passionate about the subject since in my opinion the AGC
system can either make or break a receiver.
Over the past 12 months I've experimented with different controls and
algorithms in th
Thanks Phil for this very interesting and thought provoking
article. I hope to read some great replies from both the
Engineering and Programming communities.
I remember in 2004 that Ten-Tec put out a document about how to
tune the ORION AGC. I think this underscores the importance of AGC
for all
I get an error message - site not available - when I try to open the
document.
Bob
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Ken - N9VV
Sent: Thursday, August 11, 2005 10:29 AM
To: FlexRadio Systems email reflector
Subject: [Flexradio] [Fwd: Re: AGC Id
Here is an interesting article about Orion AGC
USING ORION's RECEIVER
by Sinisa Hristov YT1NT, VA3TTN [EMAIL PROTECTED]
Version 0, Feb 28, 2004
http://www.k3bu.us/settings.htm
de Ken
I must also apologize to Dale Boresz who pretty clearly pointed this out
in one of
the earliest testing notes and I have fixed 1/2 of his problems: the
1st dit and the
variability of the offset.
Bob
Robert McGwier wrote:
Back in the days when we were rushing like mad to get all sorts of stuf
I used Phil's AGC code in the VB radio and found it very smooth and restful
to listen to, especially over a period of hours. I was able to switch back
and forth for comparison with the standard system and Phil's was definitely
a winner.
I also used a two detector system back in the 70's, when the
Phil,
thank you very much for the AGC paper. That is exactly what I would like
to see integrated in the PowerSDR software. As Bob G4BBY already wrote,
the characteristic also reminds me of the Plessey SL621.
73 Bodo DJ9CS
I want to thank all of the audiophiles who have contributed information
to the transmit audio shaping. While we already knew the answer, it is
very clear now that we have these files. The audio shaping should never
be a part of the transmit filter and that IF transmit filter should be
as fla
Bob,
What I like best about Flex-Radio and its support team is -they listen
and take action. The ball is your court. I look forward to playing with the
new features when they become available. In the meantime, I will play with the
numerous features of my software defined audio system by
I want to thank Phil for his fantastic analysis. The dual detector was
what my mind was missing. It is the right question and the right
solution.His block diagram is perfect. I have asked him for his VB
code and will look to implement this.
Bob
Title: Message
I also am having
trouble getting to the linked pdf document
Pete,
N3EVL
Peter J. ThompsonPrincipal Software EngineerAuthentica,
Inc.781 487 2600 X 260Fax 781 290
0424[EMAIL PROTECTED]Authentica is the leading provider
of Enterprise Rights Management (ERM) solutions.Our ER
Anyone having difficulty, pse let me know. I will send you the
document in .pdf format. I suspect Phil has gone to bed already :-)
Ken
Pete Thompson wrote:
I also am having trouble getting to the linked pdf document
Pete, N3EVL
Title: Message
I sent the pdf
to the two folks that were having trouble downloading. If people are still having trouble
viewing the document, we could probably talk Eric Ellison into hosting it on
the Flex-Radio-Friends site.
Eric Wachsmann
FlexRadio Systems
-Original Mess
Title: Message
Thanks for sending
the doc.
Between Lyons DSP
book and his excellent article on Quadrature Signals and now this AGC paper, I
have my bedtime reading well established.
Pete
For those of you who would prefer to
ftp the document, I have just loaded
it into upload/VK6APH. You will need
the Flex-Radio-Friends ftp ID and PWD
to get in.
This link is working without any problem
from Chicago.
http://www.n9vv.com/VK6APH-AGC-discussion-SDR1000.pdf
sorry for any problems,
Ken
Title: Message
Another source for the Phil's excellent document:
http://www.hamsdr.com/dnld.aspx?id=20
73, Dale WA8SRA
Pete Thompson wrote:
I also am having trouble getting to the linked pdf
document
Pete, N3EVL
Peter J. Thompson
Principal Software Engineer
Authent
Title: Message
Eric1 et al.
Would be glad to, the FRF is not in great
repair at the moment, apologies. Dale also has an excellent website started.
Ken’s site has always been great!
Eric – AA4SW
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Eric
Sent:
Ken
Thanks
Not a problem. Go to http://flex-radio-friends.net/
Upload. Folder is VK6APH, it is the only pdf in the folder.
Tested it and it works OK. I look forward to reading the paper, since
everything Phil has ever posted has been understandable at all levels, and
distilled to simplicity.
Hi Bob N4HY.
>The thing the> audiophiles hate most about the sound is the flat
response of that> filter and the inability to shape it
adequately. We need to be able to> provide arbitrary filter
shapes on the transmit audio before it becomes> "RF" in the transmitter
filtering.
A tran
Guys,
Clearly this will be an optional thing and
will likely be used differently depending on what mode you are in and what kind
of audio processing you will do outside of the PowerSDR
software with other software/hardware.
We know that AM sounds perfect with a flat response, but SSB
Larry W8ER wrote:
In case you are a doubting soul, listen to what can be done with a flat
FLEX transmitter as it is:
http://w8er.com/audio/w9ad.mp3
Yow. That is positively scary.
Reassuring, though. We went through a fair amount of soul searching
before deciding to move the input audio pro
Folks
This is an inquiry message to access interest in a Delta44 interface
kit designed by Bill Guyer and discussed on the reflector. The design after
discussions with Bill and Tony includes RF filtering on all audio lines with
SMT chips. The chips chosen are large enough for easy solde
Dear gentle people of the Flex list,
Gerald published the first product Roadmap on April 11,
2005. The list had an "A" section for highest priorities
and then the "B" list for after Dayton.
It looks like Flex met and *exceeded* most of their "A"
list objectives and dug deep into the "B" list
Good evening everyone.
I'm afraid I have created a bit of a confusing mess of the SoftRock40 order
list. By presenting various options and then not being able to deliver the
experimental PCM2900 board, along with various people wishing to select more
recently offered options, I have shipped se
On software versions 1.4.1 and 1.4.3 I have noticed
a 10 Hz display error on the visual display of the console.
While zero beating a carrier using the phase
display, the carrier appears 10 Hz higher in frequency when switched back
to the spectrum display.
Using Bill's "0 Beat" function, t
I, too, have noticed this problem in v1.4.4 (I did not spend much time with
the previous v1.4.x code).
I don't if the signal has shifted wrt to the display or "versa vice".
Additionally, there exists a difference in the "zero-beat" frequency when
shifting back and forth between the "spec" and an
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