[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] Behavior of PEAK hold in Preview 12
Title: Behavior of PEAK hold in Preview 12 Eric et. al. I have noticed that if I have PEAK HOLD turned on when I am using the Panadapter that if I change the frequency the peak signal that was displayed stays in the display just shifted by the value of the frequency change. Let me try to explain better with an example. Say I am listening to a quiet band, 14.300 and the signal is flat @ -130 dB. Now a strong signal is present at 14.300, so with PEAK HOLD on I see a rise in the signal from 14.300 to 14303. If I move the VFO to 14.303, the 3 KHz rise in signal moves to the left of the center line in the Panadapter. Now another strong signal at 14.303 to 14.306 is present. At this point with PEAK HOLD I on, I now have displayed on my screen a 6 KHz wide increase in signal. This makes looking for signals much harder since if you change frequency the display stays cluttered with previous signal display. I suspect this is the way it works, but I think if you move the VFO you would want to erase the signal displayed by PEAK HOLD. In other words, if the VFO is changed, the display should be reset only if PEAK HOLD is engaged. This is the way my other radios that have a peak hold feature work. So, in a round about way I am asking for the current behavior of PEAK HOLD to be changed when the frequency changes. What do the other Flexers have to say about possibly making this change? -Tim --- Tim Ellison Integrated Technical Services Apex, NC USA 919.674.0044 Ext. 25 / 919.674.0045 (FAX) 919.215.6375 - cell Skype: kg4rzy
Re: [Flexradio] Frequency on AM
I just used a knife and whittled away the plastic near the end of the plug. No interference on fit now. Mike - AA8K 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
Re: [Flexradio] Frequency on AM
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] Apologies
Well I have returned home to a couple of disasters.I downloaded email, etc. on Monday morning at 1:30 AM when I returned home.My antivirus service updated the engine and asked me to reboot. I did and went to bed. I got up the next day and Read Error Ctrl-Alt-Del and that is all it will do. I had a day long presentation at Rutgers yesterday and this morning I attempted install the drive on another machine. It is hopelessly gone. I have lost about two months stuff plus/minus. I got lazy about the beginning of my trip to Germany and then I had the business trip to Reno, etc. etc. I just did not do the backups I was supposed to do for six weeks and got bit. If you have sent me email in the past two weeks, consider it lost. It is possible that I may eventually get enough stuff off this drive to find some of it useful but I am in reconstruction mode. Bob
Re: [Flexradio] Apologies
My sympathies! What antivirus service was it? Richard W5SXD Robert McGwier [EMAIL PROTECTED] wrote: (02/01/2006 19:10) Well I have returned home to a couple of disasters.I downloaded email, etc. on Monday morning at 1:30 AM when I returned home.My antivirus service updated the engine and asked me to reboot. I did and went to bed. I got up the next day and Read Error Ctrl-Alt-Del and that is all it will do. I had a day long presentation at Rutgers yesterday and this morning I attempted install the drive on another machine. It is hopelessly gone. I have lost about two months stuff plus/minus. I got lazy about the beginning of my trip to Germany and then I had the business trip to Reno, etc. etc. I just did not do the backups I was supposed to do for six weeks and got bit. If you have sent me email in the past two weeks, consider it lost. It is possible that I may eventually get enough stuff off this drive to find some of it useful but I am in reconstruction mode. Bob ___ 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] Flex-Radio-Friends Teamspeak Forum Focus Topic for 2-4-06 - 0100 utc
Colaboration Tools SVN The other night I was listening on Teamspeak as Bill KD5TFD and Tony - were discussing oscillator and receiver performance of the SoftRock40 V5. Bill had posted a link to about 40 scope traces on his website that were the focus of the discussion. I had no part in it, but felt that I was privileged to be hearing and viewing a live magazine article in QEX. Since its inception about 1.5 years ago this type of conversation has occurred many times over on many different projects. Although I provided Teamspeak so Gerald, and sdr-1000 owners might just have a discussion forum for presenting ideas and updates, it has been used far more as a collaboration tool. Had it not been for Teamspeak, the SoftRock40, UCB and many other offshoots, currently including the FPGA, collaboration might not have happened at all. If they did happen they would have evolved, MUCH more slowly. Teamspeak happened to be the right groupware tool at the right time. My point here is a tool very effectively being used for a needed purpose springboard rapid active collaboration and project delivery. The fpga offshoot interest group known as Xylo came together almost overnight with Dale WB8SRA and Don AE5K providing almost instant and abundant resources for the group. One resource Dale provided was an SVN server. SVN and CVS are client/server collaborative document versioning tools. We have all heard them mentioned before, but I suspect few are using them or understand how they work. Some of the FPGA folks put some files up on the server but no one has jumped on the value of the usage. I think part of the reason is that everyone thinks there is a huge learning curve to overcome. That they are very complex and not worth the effort to learn. This past week I decided to look into it a little further and have been PM ing Dale to get some idea how they work. Frankly I found it to be much easier than I imagined, and to my way of thinking almost a necessity to accelerate programming projects. Actually any project where more than one person is working on a document or group of related documents (like a User Manual?). It even is helpful for ONE person to use it in a local project! It is easier than Teamspeak to install and begin using. The learning curve is not that bad, if this dummy (me) can do a couple of hours of reading and experimenting and use it effectively. The SDR-1000 open source development path to date has been one of individuals working on the released source code, making modifications, e-mailing the modifications to Eric1. Eric1 evaluates the snippit of code or whole project and includes changes in the next beta release or does not use it. This is not bad, and it accomplishes the purpose of always having a stable release version and a beta which is offered back to the users from FlexRadio. It HAS worked very well and we DO have a stable, documented release. It is also a very dangerous method since it really IS NOT VERSIONED. The result of which has happened to Bob N4HY a number of times working with Eric1. He e-mails a big file with his improvements only to find out that the file he sent is an old one with bugs in it, that he has already corrected once in a later revision of the file. NOT GOOD! The adage is that AOL AIM is not a versioning tool. Occasionally users like Bill KD5TFD make modified versions of their project on their websites. Bills code is good until the next Beta version is released, and then Bills version is no longer the current version with his mods. We as users download Bills code and like the mods, then we lose them to the next beta release, unless Bill does extra effort to include his mods in the new release. John K2OX is the most recent of the fantastic contributing programming folks doing this. We may or may not see the audio recording mods he has made to the code which sound VERY interesting and some of us would like to play with it. John also mentioned another development he is working on. A standard user specific include file which can be compiled into the latest release from Flex Radio. That WOULD be very nice and approximates a user modal approach. All of these efforts lack two important things, collaboration and some method of versioning. The same thing is happening to contributors in the FPGA group! There is NO reason that open source contributors to PowerSDR source cant have a branch as it is called in SVN. Eric1 has just as much access as anyone else and can incorporate anything he wants into the FlexRadio official supported versions. Enter Dale WA8SRA and Tortise SVN on the client side. Dale and I have been collaborating for a while on this and have an assignment for you. Also Dale will be around this Friday night on the Teamspeak Forum to answer questions, he also has put together a Getting Started Guide. However, in just one message to me, after I had installed Tortoise he had given me a 5 line how to and it worked! I am running a
