Re: [Flexradio] Frequency on AM
One of the most helpful things (to me) that has come from this group has been the occassional well thought out treatise on "we should do things this way" My favorite examples are 1) Phil Harman's paper on agc which has led to a great improvement in that area (and will lead to more) and 2) the descriptions of what is needed to aid the audio processing given by the audio experts (W5GI, et. alia). This radio should be the very best AM transmitter period. If someone were to put together a paper like Phil's agc paper, where a concise description of the ideal was presented, it would be helpful. Bob Charles Greene wrote: Mike, Good tip. I reversed two phone plugs going into my Fire Box. Now I could zero the TX image when on AM. As measured on the spectrum analyzer, on AM, while transmitting into the dummy load, the image at 7.0785 Khz is 40 dB below the signal at 7.1 Mhz. Image down the same on CW. Settings on TX image reduction are phase -1 and gain 10. I redid the RX image reduction to be sure, and it came out a little different: phase -1.75 and gain 3.44. It sounds good now on SSB and AM. tnx, Chas, W1CG At 08:27 AM 2/1/2006, Mike WA8BXN wrote: I had a problem of transmitting two AM signals at the same time, one of the audio cables was not firmly seated in the SDR-1000. One of these days I ought to take it apart and enlarge the holes in the chassis so that is less likely to happen. If you just got one signal on 3.878 and little on 3.9, then it sounds like the left and right are reversed on audio going into the sdr-1000. 73 - Mike WA8BXN ---Original Message--- From: Charles Greene Date: 02/01/06 08:16:32 To: FlexRadio@flex-radio.biz Subject: [Flexradio] Frequency on AM GM, I was trying to do some image reduction on the TX signal, and I set up a distant receiver and set the PowerSDR Console to AM. The transmitted signal was on 3.9 Mhz and the receiver read 3.878 KHz. On SSB and CW, signal frequency is right on. Tried another receiver, the same. Put on a spectrum analyzer and tried to reduce the image using phase and gain. Best I could get it was the primary signal was 15 dB down from the image with the phase control all the way to the left. Recalibrated RX level and image rejection. Settings were phase -1, gain 2.63. Set the TX phase and gain to those settings. Can't see the image signal on the spectrum analyzer. Evidently there is a problem on AM, not that I use it, but is it my set or does anyone else experience it? 73, Chas W1CG ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
[Flexradio] Questions on the Windows code
WARNING - technical stuff. I don't know exactly who to address these to so if Eric/Frank/Bob want to take them off-line please do so. I am building a Squeak plugin from the DttSp Windows code-line. I have put the audio processing on the 'C' side of the fence and made necessary changes to the interfaces. Fundamentally it works in that the right calls get made and everything starts up and runs. Can't actually get any audio out of it yet but at the moment I am trying to understand the code. I probably have not understood correctly how things work, hopefully someone can put me straight. A couple of things which have got me puzzled. In audio.cs there is some code to start the process_samples_thread which is in the DttSp winmain.c. However, in setup_threading in winmain.c there is also code to start the process_samples_thread. I did have code in my audio.c to start it until I realized it was starting twice. When I first tried to run things all the threads were getting hung. I tracked this down to everything waiting on top.sync.upd.sem. I had to comment out the wait on that S4 in process_samples_thread to get things moving. Clearly I shouldn't need to do this. Looking through the code as I understand it an initialise like sem_init(&top.sync.upd.sem, 0, 0); will initialise in a locked state. I can't find anywhere in the code where this S4 is posted which does not have a preceding wait. Obviously the code works so what am I missing? 73 Bob -- *** Confidentiality Notice *** Proprietary/ConfidentialInformation belonging to CGI Group Inc. and its affiliatesmay be contained in this message. If you are not a recipientindicated or intended in this message (or responsible fordelivery of this message to such person), or you think forany reason that this message may have been addressed to youin error, you may not use or copy or deliver this messageto anyone else. In such case, you should destroy thismessage and are asked to notify the sender by reply email.
Re: [Flexradio] Flex-Radio-Friends Teamspeak Forum Focus Topic for 2-4-06 - 0100 utc
As a follow-up to Eric's excellent explanation of the 'Why' of SVN, here's a link to a short 'SVN Quick-Start' guide for those who may be interested in exploring this valuable application. It's an ongoing document, so it will be changing, but I think it may help to answer some questions. http://www.hamsdr.com/personaldirectory.aspx?id=133 As described in the document, there is a 'test/demo' repository set up for all to play with. Feel free to connect to it, retrieve the files, add your own test files, and just generally use it as a target as you become familiar w/ SVN. Again, it's intended to be an svn repository target for anyone wishing to experiment, so no need to tiptoe around it. Getting svn running is very easy to do, and the Quick-Start guide contains some links to other svn references, including a link to the TortoiseSVN site from which you may download the svn client that seamlessly hooks itself into your Windows file explorer to allow you very easy and straightforward access to svn repositories. 73, Dale WA8SRA Eric Ellison wrote: Colaboration Tools – SVN ...
[Flexradio] FCC equipment authorization
Is there a FCC authorization for the SDR1000? Seems like it would be needed, since it's an intentional radiator, not just a bag of parts, etc James Lux, P.E. Spacecraft Radio Frequency Subsystems Group Flight Communications Systems Section Jet Propulsion Laboratory, Mail Stop 161-213 4800 Oak Grove Drive Pasadena CA 91109 tel: (818)354-2075 fax: (818)393-6875
[Flexradio] Fw:
I wonder if anyone has written any new 'skins' for the SDR-1000. It would be nice to see something different on my screen from time to time. I don't know how difficult it is to do these 'skins' but wouldn't it be great to have a NEW radio every month? Mike VE3BGE <> <>
Re: [Flexradio] Fw:
Michael, This is the long term goal for the new architecture: To be able to enable users to develop their own custom console that caters to their own style of operating. We'll get there in time. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michael Freedman Sent: Thursday, February 02, 2006 6:31 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] Fw: I wonder if anyone has written any new 'skins' for the SDR-1000. It would be nice to see something different on my screen from time to time. I don't know how difficult it is to do these 'skins' but wouldn't it be great to have a NEW radio every month? Mike VE3BGE
[Flexradio] Beginners - Experts - Terminology and stuff
Folks A Reflector member contributed a PM suggesting that I clarify some of the terms the I, and others have been using on the Reflector since the acronyms can be daunting to recent members reading. I find this a very reasonable request. I’ll start with that: FPGA (Field Programmable Gate Array) An integrated circuit which is essentially a “hardware etch-a-sketch”. About 4 manufacturers make them. You actually write a program with tools offered by the manufacturer and create your own customized integrated circuit. It can be just about anything, from a microprocessor to a high speed counter, to a light switch, when you press the button it lights the light. Price range is $10 to $1800. It is an order of magnitude beyond a PIC (programmable interface controller). If you are a C programmer it is worth a look. Beyond that you will have to read for yourself about these “ digital diamonds in the rough” Xylo (product name from FPGA4FUN) Is an experimental FPGA board with resources like USB (Universal Serial Buss), VGA, (Video Graphic Adapter), and other common I/O tools on board, with drivers on board to experiment with FPGA’s. Offered by FPGA4FUN.com. Plug it into a USB port on a computer and begin experimenting with FPGA for about $100. A hobbiest thingy like ham radio. Saxo (product name from FPGA4FUN) A variant of the Xylo above. The website also has experiments and products such as an oscilloscope which plugs into the parent board. Not a joke! I intend to buy the scope and use it in the shack! SVN A program which integrates into the file system on your computer to access files stored on a server (can be on the same machine). SVN stands for Subversion. In the simplest form it could be a letter to your mother which you edit and make changes to over a period of time. Oh Oh you made a mistake or don’t like the current version! Alas, you wish you had the last version. Tough luck! You are stuck with the current and you spent HOURS on it! Subversion lets you look at the last X versions and even cut and paste between versions. THEY are labeled versions, and there is always one current version. Change scenario to 5 folks teaming up to edit the Flex-Radio user manual, cause manuals are their thing! All 5 have server and local access to the manual and make changes. (Pretty Confusing! And we tried this on Teamspeak!). SVN organizes this collaborative effort by keeping previous versions, and facilities to merge various versions. SYNERGY! The SVN program written by experts and offering it for GPL and free have given us the tool to operate on a document project as a TEAM! You don’t need to know how it works, just how to use it for your benefit. This IS the subject of this weeks Teamspeak forum and our expert and SVN server provider Dale – WA8SRA will be there to answer questions. I am going to ram it down your microphone! It IS a GOOD thing for team collaboration on any team document project! Now Gerald – K5SDR suggested on Teamspeak session a couple of weeks ago that we have separate Reflectors for the technospeak guys from the “new users” who might be ‘turned off by the jargon” and the ‘technospeak”…. I have mixed feelings about it. What do you think? This is ham radio, but also it is ham radio on the move and a new exciting ‘edge’ of technology. I don’t think we should be divided at this point. If you are a new ham and don’t have an interest in SVN-XYLO-SAXO-FPGA then punch up the next message. Personally I am currently bypassing most messages AM related. I don’t think NOW is the time to divide the momentum on this Reflector. Ham radio, just like this forum is a mixture of many interests. If you have an interest in “Snowbounce” Mike King – KM0T is here to answer your questions! He will see messages in that interest area. I have NEVER seen Bob – N4HY not respond to a message on Linux. It’s all a part of the future of ham radio! We are not ready to separate except in the ‘subject’ line! Just my 2 cents. Thanks Eric2 – AA4SW
