Re: [Flexradio] SSB audio question
It was really a combination of the echo and recognising your call from this venue. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ab7r Sent: Sunday, December 11, 2005 2:55 PM To: Flexradio@flex-radio.biz Subject: [Flexradio] SSB audio question Not sure if this has been addressed, but probably has. Was spending some time in the 10M contest and worke W5SXD (Hi Rich). He knew right off the bat I was running an SDR1K cuz of an echo in the audio. I have also had other remark about a slight echo. Any idea what causes this and if it can be eliminated? Other than that, SDR1K played well using N3FPJ software and 1KW amp. Originally was getting lock up problems, but moved my USB port around and added some ferrite beads and eliminated the problem. 73 Greg AB7R ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] SSB audio question
It has been my experience with a slower computer that the buffer size will effect the transmit echo. Try lowering it and see what reports you get, I needed to use the lowest setting. 73 Hank - K9LZJ Hank Wolfla Lyman H. Wolfla II, Inc. 1308 S. Peace St. Greenfield, IN 46140 [EMAIL PROTECTED] 317-861-0186 Cell: 317-448-3457 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of richard allen Sent: Wednesday, December 14, 2005 4:46 AM To: 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It was really a combination of the echo and recognising your call from this venue. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ab7r Sent: Sunday, December 11, 2005 2:55 PM To: Flexradio@flex-radio.biz Subject: [Flexradio] SSB audio question Not sure if this has been addressed, but probably has. Was spending some time in the 10M contest and worke W5SXD (Hi Rich). He knew right off the bat I was running an SDR1K cuz of an echo in the audio. I have also had other remark about a slight echo. Any idea what causes this and if it can be eliminated? Other than that, SDR1K played well using N3FPJ software and 1KW amp. Originally was getting lock up problems, but moved my USB port around and added some ferrite beads and eliminated the problem. 73 Greg AB7R ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] SSB audio question
There seems to me that there is a common theme floating around here concerning the buffer settings for optimal use. Since there also seems to be answers that are all over the spectrum (which is understandable due to the variables involved), maybe a more scientific approach is required Maybe what we need to do is collect some data from the users on the reflector on the processor used vs. buffer settings categorized by sound card. Plot the data with the processor/speed data on the X axis and the buffer settings data on the Y axis. Hopefully there will be some sort of correlation and the graph will have some sort of linearity. If it works, a nice little graphical representation could be useful for new users setting initial buffer setting values and experienced users to tweak their systems. I'd be willing to collect the data if enough people are interested. Just send it to me off-list I need the following data: 1.) Processor family/type and speed 2.) Type of sound card used 3.) DMA buffer size (Delta 44) 4.) Sound Card buffer size 5.) DSP buffer size 6.) VAC buffer size (if applicable) -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lyman H. Wolfla II Sent: Wednesday, December 14, 2005 7:52 AM To: 'richard allen'; 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It has been my experience with a slower computer that the buffer size will effect the transmit echo. Try lowering it and see what reports you get, I needed to use the lowest setting. 73 Hank - K9LZJ Hank Wolfla Lyman H. Wolfla II, Inc. 1308 S. Peace St. Greenfield, IN 46140 [EMAIL PROTECTED] 317-861-0186 Cell: 317-448-3457 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of richard allen Sent: Wednesday, December 14, 2005 4:46 AM To: 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It was really a combination of the echo and recognising your call from this venue. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ab7r Sent: Sunday, December 11, 2005 2:55 PM To: Flexradio@flex-radio.biz Subject: [Flexradio] SSB audio question Not sure if this has been addressed, but probably has. Was spending some time in the 10M contest and worke W5SXD (Hi Rich). He knew right off the bat I was running an SDR1K cuz of an echo in the audio. I have also had other remark about a slight echo. Any idea what causes this and if it can be eliminated? Other than that, SDR1K played well using N3FPJ software and 1KW amp. Originally was getting lock up problems, but moved my USB port around and added some ferrite beads and eliminated the problem. 73 Greg AB7R ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
[Flexradio] Forums
On behalf of my German friends thanks a lot to the FlexRadio staff for bringing back the forums. Well done - hopeannon supervisedserver change will never occur again. 73 - Klaus, DK7XL
Re: [Flexradio] Mute for SDR Receiver
Larry, Im confused about what you want. Are you looking for a way to hook one antenna up to multiple radios? (RX for some and TX for others?) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry W8ER Sent: Tuesday, December 13, 2005 7:17 PM To: Flex Reflector Subject: [Flexradio] Mute for SDR Receiver Guy's I haven't found a nicer receiver than the one in the Flex. I have been wanting to use it with a couple of other transmitters and haven't found a way to mute the receiver during the transmit period. I guess anything that would lift the audio would work but it would not be a very elegant way to do it. Doing it that way would require the AGC to recover etc. I have noticed the software mute button on Power SDR but that would be cumbersome. I can't find anything in the documentation that points me in the right direction. Any ideas? --Larry W8ER
Re: [Flexradio] SSB audio question
I like this approach and would appreciate being able to see some data like this. However, I'd like to throw in my 2 cents here. An even bigger issue than having just a 1GHz processor is: What processes are running at the same time as the PowerSDR software? We have seen instances where two people running similar specced computers (same CPU speed, same amount of ram, same OS, etc) got very different PowerSDR results because of what OTHER software was loaded and running on the machine. If you have other sources competing for the CPU, you may experience artifacts that wouldn't otherwise be there. I'll leave the issue of what to remove and what is necessary to someone else to decide, but it is a good idea to know what processes are running on your computer. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Wednesday, December 14, 2005 7:53 AM To: Lyman H. Wolfla II; richard allen; ab7r; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question There seems to me that there is a common theme floating around here concerning the buffer settings for optimal use. Since there also seems to be answers that are all over the spectrum (which is understandable due to the variables involved), maybe a more scientific approach is required Maybe what we need to do is collect some data from the users on the reflector on the processor used vs. buffer settings categorized by sound card. Plot the data with the processor/speed data on the X axis and the buffer settings data on the Y axis. Hopefully there will be some sort of correlation and the graph will have some sort of linearity. If it works, a nice little graphical representation could be useful for new users setting initial buffer setting values and experienced users to tweak their systems. I'd be willing to collect the data if enough people are interested. Just send it to me off-list I need the following data: 1.) Processor family/type and speed 2.) Type of sound card used 3.) DMA buffer size (Delta 44) 4.) Sound Card buffer size 5.) DSP buffer size 6.) VAC buffer size (if applicable) -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lyman H. Wolfla II Sent: Wednesday, December 14, 2005 7:52 AM To: 'richard allen'; 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It has been my experience with a slower computer that the buffer size will effect the transmit echo. Try lowering it and see what reports you get, I needed to use the lowest setting. 73 Hank - K9LZJ Hank Wolfla Lyman H. Wolfla II, Inc. 1308 S. Peace St. Greenfield, IN 46140 [EMAIL PROTECTED] 317-861-0186 Cell: 317-448-3457 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of richard allen Sent: Wednesday, December 14, 2005 4:46 AM To: 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It was really a combination of the echo and recognising your call from this venue. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ab7r Sent: Sunday, December 11, 2005 2:55 PM To: Flexradio@flex-radio.biz Subject: [Flexradio] SSB audio question Not sure if this has been addressed, but probably has. Was spending some time in the 10M contest and worke W5SXD (Hi Rich). He knew right off the bat I was running an SDR1K cuz of an echo in the audio. I have also had other remark about a slight echo. Any idea what causes this and if it can be eliminated? Other than that, SDR1K played well using N3FPJ software and 1KW amp. Originally was getting lock up problems, but moved my USB port around and added some ferrite beads and eliminated the problem. 73 Greg AB7R ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Mute for SDR Receiver
Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other thanthe Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. Thanks Eric, --Larry - Original Message - From: Eric Wachsmann - FlexRadio To: 'Larry W8ER' ; 'Flex Reflector' Sent: Wednesday, December 14, 2005 11:09 AM Subject: RE: [Flexradio] Mute for SDR Receiver Larry, Im confused about what you want. Are you looking for a way to hook one antenna up to multiple radios? (RX for some and TX for others?) Eric Wachsmann FlexRadio Systems -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry W8ERSent: Tuesday, December 13, 2005 7:17 PMTo: Flex ReflectorSubject: [Flexradio] Mute for SDR Receiver Guy's I haven't found a nicer receiver than the one in the Flex. I have been wanting to use it with a couple of other transmitters and haven't found a way to mute the receiver during the transmit period. I guess anything that would lift the audio would work but it would not be a very elegant way to do it. Doing it that way would require the AGC to recover etc. I have noticed the software mute button on "Power SDR" but that would be cumbersome. I can't find anything in the documentation that points me in the right direction. Any ideas? --Larry W8ER
Re: [Flexradio] Spurs on 10 meters and 6 meters
Jeff, As in all technologies, there are tradeoffs. In this case the tradeoff is phase noise vs. spurs at discrete frequencies. If we had used a traditional PLL type LO, my observations indicate that we would probably have 20dB lower close spacing dynamic range due to phase noise that is present at ALL frequencies. This is opposed to spurious output of a DDS, which is present only at predictable discrete frequencies. When you are trying to achieve almost 100dB of 2KHz spacing IMD DR3, a DDS is the only way I know to do that. There are very expensive and well known PLL based rigs on the market that only get 80dB of third order dynamic range at 2KHz spacing due to phase noise limitations. The worst case spurs on a DDS occur at integer divisors of the clock, which in our case is 200 MHz. As you go down in frequency (larger divisors) the spurs will reduce in amplitude according to the formula sin(x)/x. This means that as you go to lower frequencies the spurs become more closely spaced but also much lower in amplitude. Fortunately, atmospheric band noise covers the vast majority on the lower bands. In our case, we offset the DDS by 11.025 KHz +/- about 1.5 KHz. This number must be added to the display frequency to find the spurs. There are singular worst case spurs in only one location on 10m and on 6m respectively. They will show up around 28.582 (200/7 + .011) and 50.011 (200/4 +.011). The simplest method will be to just move the software IF down 22 KHz when we are near integer multiples. This would not involve shrinking the panadapter bandwidth. The IF frequency is arbitrarily chosen within the 48 KHz bandwidth. This is something that should be fairly easy to do so I will see that we move it up high in the software priority list. A longer term method is to map the spurs and linearly subtract them in the frequency domain. This subtraction would have NO effect on the signals of interest since power is additive in the frequency domain. The net-net is that I would rather implement software to do frequency planning at integer divisors of the clock than to sacrifice 20dB of dynamic range at ALL frequencies with a PLL type synthesizer. There is no way I know of to remove uncorrelated phase noise in software. 73, Gerald K5SDR FlexRadio Systems -Original Message- From: Jeff Anderson [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 13, 2005 10:36 AM To: Gerald Youngblood; FlexRadio@flex-radio.biz Subject: RE: [Flexradio] Spurs on 10 meters and 6 meters Gerald, I like the radio and I very much enjoyed meeting you at Pacificon (I was talking with you when the fire broke out on Sunday), but your remarks (and those of others) and their implication that those who are concerned about the spurs really ought not be (and the perceived denigration implicit within that), beg for a reply. First, please, do not presume that the locations of the worst case spurs don't really matter. What may be don't care locations to you might be important to me or someone else. Fortunately, 10 meters isn't a happening-place at the moment, but someday... Second, I paid in the ballpark of three thousand bucks for this radio. Shouldn't I expect performance to be commensurate with this amount, and, if there are short comings, haven't I paid for the right to question these performance issues, if and when they occur, and to wonder how they can be improved upon? Third, yes - one of the radio's virtues is that performance can be improved with software updates. But if we're going to bring some reality into the discussion, then I'd prefer not to hear Marketing spin. Let's also discuss the negatives of any proposed approaches (if negatives exist), and not just the positives. I've been in the biz long enough to know that software fixes to hardware problems are usually not a panacea and often involve compromises. Are there trade-offs associated with the proposed spur fixes? E.g. shrinking of the panadapter display bandwidth (if shifting the IF)? Loss of a signal that might have been masked by a spur (if notch the spurs)? The panadapter display is a great feature. It, and the possibility of its width being expanded with a future s/w rev, were the two main reasons why I purchased this radio. And thus, to the extent that the display is anything other than perfect (with perfection being max possible displayed bandwidth no spurs (neither masking signals nor in my audio passband)), I would like to know about it. With that said, please recognize that, despite my grousing, I like the radio. But, I would also like it to be better. Best regards from a Flex-Radio customer. - Jeff, WA6AHL P.S. While I'm at it - could I make a recommendation? I would like to recommend that, when shipping the radio, you include with the radio the following items (to minimize customer grumbling and unanticipated trips to Radio Shack): 1. A
Re: [Flexradio] Mute for SDR Receiver
Eric, I, too, would like to mute the SDR receiver. Sometimes one has need to use a external transmitter separate from the SDR and the ability to mute the SDR receiver, ie, make it deaf during those transmissions, would be nice. 73, Dale AA5XE Eric Wachsmann - FlexRadio wrote: Larry, Im confused about what you want. Are you looking for a way to hook one antenna up to multiple radios? (RX for some and TX for others?) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Larry W8ER Sent: Tuesday, December 13, 2005 7:17 PM To: Flex Reflector Subject: [Flexradio] Mute for SDR Receiver Guy's I haven't found a nicer receiver than the one in the Flex. I have been wanting to use it with a couple of other transmitters and haven't found a way to mute the receiver during the transmit period. I guess anything that would lift the audio would work but it would not be a very elegant way to do it. Doing it that way would require the AGC to recover etc. I have noticed the software mute button on "Power SDR" but that would be cumbersome. I can't find anything in the documentation that points me in the right direction. Any ideas? --Larry W8ER ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] SSB audio question
I like this approach and would appreciate being able to see some data like this. However, I'd like to throw in my 2 cents here. An even bigger issue than having just a 1GHz processor is: What processes are running at the same time as the PowerSDR software? We have seen instances where two people running similar specced computers (same CPU speed, same amount of ram, same OS, etc) got very different PowerSDR results because of what OTHER software was loaded and running on the machine. If you have other sources competing for the CPU, you may experience artifacts that wouldn't otherwise be there. I'll leave the issue of what to remove and what is necessary to someone else to decide, but it is a good idea to know what processes are running on your computer. Eric Wachsmann FlexRadio Systems In particular, do you have any of those distributed computing applications (e.g. [EMAIL PROTECTED] or equivalent)? These things all run at low priority, but they still run. It costs something to get them out of the way. They also tend to kill the cache. Since the PowerSDR basic digital signal processing loop is real time or near real time processing (as real time as the MS' OS allows at any rate), extra stuff, no matter how low priority it is, can make a difference. I know I run some of that stuff, I have for years in competitive teams, but you really have to remember to shut it off when you're serious about SDR performance, especially audio without dropouts. Certainly, when running CW and trying to work rare DX, I just don't want or need that stuff to be in the way. Larry WO0Z
Re: [Flexradio] Mute for SDR Receiver
Well, again, Im confused by your description because we already have a Mute feature that kills the audio without affecting the AGC. If youre saying that you need a way to do this via an external relay, then that is something that could be arranged in the software. You could hook one of the X2 inputs so that it asserts the Mute when it detects that it has gone high. Eric Wachsmann FlexRadio Systems -Original Message- From: Larry W8ER [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 10:28 AM To: [EMAIL PROTECTED]; 'Flex Reflector' Subject: Re: [Flexradio] Mute for SDR Receiver Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other thanthe Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. Thanks Eric, --Larry - Original Message - From: Eric Wachsmann - FlexRadio To: 'Larry W8ER' ; 'Flex Reflector' Sent: Wednesday, December 14, 2005 11:09 AM Subject: RE: [Flexradio] Mute for SDR Receiver Larry, Im confused about what you want. Are you looking for a way to hook one antenna up to multiple radios? (RX for some and TX for others?) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry W8ER Sent: Tuesday, December 13, 2005 7:17 PM To: Flex Reflector Subject: [Flexradio] Mute for SDR Receiver Guy's I haven't found a nicer receiver than the one in the Flex. I have been wanting to use it with a couple of other transmitters and haven't found a way to mute the receiver during the transmit period. I guess anything that would lift the audio would work but it would not be a very elegant way to do it. Doing it that way would require the AGC to recover etc. I have noticed the software mute button on Power SDR but that would be cumbersome. I can't find anything in the documentation that points me in the right direction. Any ideas? --Larry W8ER
Re: [Flexradio] Mute for SDR Receiver
Eric, The desired mute needs to be more than just the audio since the agc will get twanged badly. The objective, in addition to muting the audio is to have the RX up and running immediately upon release of the mute. It should, in addition to being a single hardware closure, work thru the CAT. Richard W5SXD Eric Wachsmann - FlexRadio [EMAIL PROTECTED] wrote: (12/14/2005 10:50) Well, again, I'm confused by your description because we already have a Mute feature that kills the audio without affecting the AGC. If you're saying that you need a way to do this via an external relay, then that is something that could be arranged in the software. You could hook one of the X2 inputs so that it asserts the Mute when it detects that it has gone high. Eric Wachsmann FlexRadio Systems -Original Message- From: Larry W8ER [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 10:28 AM To: [EMAIL PROTECTED]; 'Flex Reflector' Subject: Re: [Flexradio] Mute for SDR Receiver Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other than the Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. Thanks Eric, --Larry - Original Message - From: Eric Wachsmann - mailto:[EMAIL PROTECTED] FlexRadio To: 'Larry W8ER' mailto:[EMAIL PROTECTED] ; 'Flex Reflector' mailto:FlexRadio@flex-radio.biz Sent: Wednesday, December 14, 2005 11:09 AM Subject: RE: [Flexradio] Mute for SDR Receiver Larry, I'm confused about what you want. Are you looking for a way to hook one antenna up to multiple radios? (RX for some and TX for others?) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry W8ER Sent: Tuesday, December 13, 2005 7:17 PM To: Flex Reflector Subject: [Flexradio] Mute for SDR Receiver Guy's I haven't found a nicer receiver than the one in the Flex. I have been wanting to use it with a couple of other transmitters and haven't found a way to mute the receiver during the transmit period. I guess anything that would lift the audio would work but it would not be a very elegant way to do it. Doing it that way would require the AGC to recover etc. I have noticed the software mute button on Power SDR but that would be cumbersome. I can't find anything in the documentation that points me in the right direction. Any ideas? --Larry W8ER
[Flexradio] Filter width problem
I have just experienced an unusual problem. Whenever I try to transmit, the filter display on the screen jumps to show approx. 2600hz wide. (it may be a bit wider) This happens at any setting of filter width, 6khz down to minimum. When I stop transmitting it goes back to the correct initial setting such as set in Var 1. This hasn't happened before and what would cause this. Advice please. Best wishes Ross psI I second the comment about muting. The SDR1000 is very good on receive, and i also would like to use it as a second receiver, attached to a separate aerial, while transmitting on my main beam.
Re: [Flexradio] Filter width problem
Ross, The receive filters are separate from the transmit filters. The transmit filter frequency cuts can be adjusted on the Setup Form on the Transmit Tab. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ross Sent: Wednesday, December 14, 2005 11:17 AM To: FlexRadio@flex-radio.biz Subject: [Flexradio] Filter width problem I have just experienced an unusual problem. Whenever I try to transmit, the filter display on the screen jumps to show approx. 2600hz wide. (it may be a bit wider) This happens at any setting of filter width, 6khz down to minimum. When I stop transmitting it goes back to the correct initial setting such as set in Var 1. This hasn't happened before and what would cause this. Advice please. Best wishes Ross psI I second the comment about muting. The SDR1000 is very good on receive, and i also would like to use it as a second receiver, attached to a separate aerial, while transmitting on my main beam.
Re: [Flexradio] SSB audio question
Hi all, If the chosen buffer size of the Audio and DSP setup influences the audio quality of SSB transmissions as reported by Hank, I propose to make the buffer sizes separate and selectible for reception and transmission. One buffer size may be optimal for cw and digital mo-des while an other one is best for SSB. Preferably the Power SDR program switches automatically to the predefined buffer sizes which the operator has assign-ed to different modes. Best 73 Willi - Original Message - From: Eric Wachsmann - FlexRadio [EMAIL PROTECTED] To: 'Tim Ellison' [EMAIL PROTECTED]; 'Lyman H. Wolfla II' [EMAIL PROTECTED]; 'richard allen' [EMAIL PROTECTED]; 'ab7r' [EMAIL PROTECTED]; Flexradio@flex-radio.biz Sent: Wednesday, December 14, 2005 5:09 PM Subject: Re: [Flexradio] SSB audio question I like this approach and would appreciate being able to see some data like this. However, I'd like to throw in my 2 cents here. An even bigger issue than having just a 1GHz processor is: What processes are running at the same time as the PowerSDR software? We have seen instances where two people running similar specced computers (same CPU speed, same amount of ram, same OS, etc) got very different PowerSDR results because of what OTHER software was loaded and running on the machine. If you have other sources competing for the CPU, you may experience artifacts that wouldn't otherwise be there. I'll leave the issue of what to remove and what is necessary to someone else to decide, but it is a good idea to know what processes are running on your computer. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] radio.biz] On Behalf Of Tim Ellison Sent: Wednesday, December 14, 2005 7:53 AM To: Lyman H. Wolfla II; richard allen; ab7r; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question There seems to me that there is a common theme floating around here concerning the buffer settings for optimal use. Since there also seems to be answers that are all over the spectrum (which is understandable due to the variables involved), maybe a more scientific approach is required Maybe what we need to do is collect some data from the users on the reflector on the processor used vs. buffer settings categorized by sound card. Plot the data with the processor/speed data on the X axis and the buffer settings data on the Y axis. Hopefully there will be some sort of correlation and the graph will have some sort of linearity. If it works, a nice little graphical representation could be useful for new users setting initial buffer setting values and experienced users to tweak their systems. I'd be willing to collect the data if enough people are interested. Just send it to me off-list I need the following data: 1.) Processor family/type and speed 2.) Type of sound card used 3.) DMA buffer size (Delta 44) 4.) Sound Card buffer size 5.) DSP buffer size 6.) VAC buffer size (if applicable) -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lyman H. Wolfla II Sent: Wednesday, December 14, 2005 7:52 AM To: 'richard allen'; 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It has been my experience with a slower computer that the buffer size will effect the transmit echo. Try lowering it and see what reports you get, I needed to use the lowest setting. 73 Hank - K9LZJ Hank Wolfla Lyman H. Wolfla II, Inc. 1308 S. Peace St. Greenfield, IN 46140 [EMAIL PROTECTED] 317-861-0186 Cell: 317-448-3457 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of richard allen Sent: Wednesday, December 14, 2005 4:46 AM To: 'ab7r'; Flexradio@flex-radio.biz Subject: Re: [Flexradio] SSB audio question It was really a combination of the echo and recognising your call from this venue. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ab7r Sent: Sunday, December 11, 2005 2:55 PM To: Flexradio@flex-radio.biz Subject: [Flexradio] SSB audio question Not sure if this has been addressed, but probably has. Was spending some time in the 10M contest and worke W5SXD (Hi Rich). He knew right off the bat I was running an SDR1K cuz of an echo in the audio. I have also had other remark about a slight echo. Any idea what causes this and if it can be eliminated? Other than that, SDR1K played well using N3FPJ software and 1KW amp. Originally was getting lock up problems, but moved my USB port around and added some ferrite beads and eliminated the problem. 73 Greg AB7R ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list
[Flexradio] TX problems
It appears an earlier email of mine did not get to the system. I have just had an unusual problem , unusual in that it has not happened before. Operating Olivia on 20meters. with digu button actuated I started the software this morning. the screen immediately showed the tx filter at somewhere larger than 2.5khz, probably about 2.7khz. On receive it came back to the original setting (set by Var 1 at 1700hz). Whatever filter width was set, from 600hz down to the minimum , on transmit it jumped to approx 2.7khz. This has not happened previously, what has caused it now. Second problem, Very often when I initially start the rig after a computer restart for example, or if I just turn off the PowerSDR software,it starts transmitting on lower sideband , ie below the screen centerline, the only way to get out of this "mode' is to actuate the usb button then go back to digu, Again why is this happening and what can cause it? There has been a recent comment about using the SDR as a second receiver, I second that, it would work extremely well. Its filters are extremely good and a pleasure to work with to reduce interference especially from various pactor stations. Regards to all Ross
Re: [Flexradio] TX problems
Ross, I answered your previous mail. 2 things: The RX and TX filters are set in different places. The RX side is set on the front panel. The TX is set on the Setup Form - Transmit Tab. There was a bug in Preview 7 (and possibly before) that caused the DIGL/DIGU modes to transmit using whatever the last modes transmit filter was set to (LSB, USB, DSB, etc). This is fixed in Preview 8 that we expect to release before the end of the week. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ross Sent: Wednesday, December 14, 2005 1:36 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] TX problems It appears an earlier email of mine did not get to the system. I have just had an unusual problem , unusual in that it has not happened before. Operating Olivia on 20meters. with digu button actuated I started the software this morning. the screen immediately showed the tx filter at somewhere larger than 2.5khz, probably about 2.7khz. On receive it came back to the original setting (set by Var 1 at 1700hz). Whatever filter width was set, from 600hz down to the minimum , on transmit it jumped to approx 2.7khz. This has not happened previously, what has caused it now. Second problem, Very often when I initially start the rig after a computer restart for example, or if I just turn off the PowerSDR software,it starts transmitting on lower sideband , ie below the screen centerline, the only way to get out of this mode' is to actuate the usb button then go back to digu, Again why is this happening and what can cause it? There has been a recent comment about using the SDR as a second receiver, I second that, it would work extremely well. Its filters are extremely good and a pleasure to work with to reduce interference especially from various pactor stations. Regards to all Ross
Re: [Flexradio] Mute for SDR Receiver
At 08:28 AM 12/14/2005, Larry W8ER wrote: Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other than the Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. I think the confusion might be with what mute means, because I think most folks thought it meant shutting off the AF output, but what you mean is an RF mute, or at least one that freezes the AGC. Jim
Re: [Flexradio] Mute for SDR Receiver
OK I really do not understand what for the MUTE is. If you want to transmit with other TX - OK just press PTT on the SDR and set the TX gain to 0 and you are all done. In any case you do NEED some external relay to take care of the antenna so why not for the PTT too ! 73 ! Jiri OK1RI On Wed, 14 Dec 2005, Jim Lux wrote: At 08:28 AM 12/14/2005, Larry W8ER wrote: Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other than the Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. I think the confusion might be with what mute means, because I think most folks thought it meant shutting off the AF output, but what you mean is an RF mute, or at least one that freezes the AGC. Jim
Re: [Flexradio] Mute for SDR Receiver
Larry wants to use separate receivers and transmitters - possible different antennas for the receiver and transmitter. In this situation for protecting the receiver, it must be completely isolated from the antenna during the transmitting time by a good antenna relay, PIN diode switch or high voltage PhotoMOS switch. Also, for best protection the receiver antenna terminal should be shorted using same kind of devices. I have used NAIS or Panasonic PhotoMOS AQV204 that can stand 400 V and switches in less than 100 µs. See: http://www.datasheetarchive.com/semiconductors/pdfdatasheet.php?Datasheet=387760 Naturally, carefully designed sequencing and switch driver circuits will be needed. Still, due to switching transients a good RF mute may be necessary. 73, Ahti OH2RZ - Original Message - From: Jim Lux [EMAIL PROTECTED] To: Larry W8ER [EMAIL PROTECTED]; [EMAIL PROTECTED]; 'Flex Reflector' FlexRadio@flex-radio.biz Sent: Wednesday, December 14, 2005 11:16 PM Subject: Re: [Flexradio] Mute for SDR Receiver At 08:28 AM 12/14/2005, Larry W8ER wrote: Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other than the Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. I think the confusion might be with what mute means, because I think most folks thought it meant shutting off the AF output, but what you mean is an RF mute, or at least one that freezes the AGC. Jim ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Mute for SDR Receiver
Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a "mute" function before this. -- Larry - Original Message - From: Jim Lux To: Larry W8ER ; [EMAIL PROTECTED] ; 'Flex Reflector' Sent: Wednesday, December 14, 2005 4:16 PM Subject: Re: [Flexradio] Mute for SDR Receiver At 08:28 AM 12/14/2005, Larry W8ER wrote: Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other than the Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. I think the confusion might be with what "mute" means, because I think most folks thought it meant shutting off the AF output, but what you mean is an "RF" mute, or at least one that freezes the AGC.Jim
Re: [Flexradio] Mute for SDR Receiver
Eric has to consider the protection of the front end of the receiver when muting as I'm sure there is a max limit that can't be exceeded. My TEK analyzer says Max +20 dbm on the input. Cost me $2200 to get it fixed the last time I didn't pay attention. Any leakage data on the various antenna relays available? Larry K2LT From: Larry W8ER [EMAIL PROTECTED] Date: 2005/12/14 Wed PM 10:18:55 WET To: [EMAIL PROTECTED], 'Flex Reflector' FlexRadio@flex-radio.biz, Jim Lux [EMAIL PROTECTED] Subject: Re: [Flexradio] Mute for SDR Receiver Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a mute function before this. -- Larry Larry Taft K2LT T and T Measurements drakerepair.com 800-687-9161 ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Mute for SDR Receiver
The solution Larry and I discussed was an audio only fix that does not handle the RF side at all. We will be testing an Auto Mute function using X2-12 as an input. Grounding this input will assert the Mute function as it exists today. RF switching will need to be handled separately and should be considered carefully as others have noted that there _are_ reasonable limits (say what?) to what you can put into the SDR-1000 front end. I'll let the hardware experts talk about what those limits are. ;) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:06 PM To: Larry W8ER; [EMAIL PROTECTED]; 'Flex Reflector'; Jim Lux Subject: Re: Re: [Flexradio] Mute for SDR Receiver Eric has to consider the protection of the front end of the receiver when muting as I'm sure there is a max limit that can't be exceeded. My TEK analyzer says Max +20 dbm on the input. Cost me $2200 to get it fixed the last time I didn't pay attention. Any leakage data on the various antenna relays available? Larry K2LT From: Larry W8ER [EMAIL PROTECTED] Date: 2005/12/14 Wed PM 10:18:55 WET To: [EMAIL PROTECTED], 'Flex Reflector' [EMAIL PROTECTED] radio.biz, Jim Lux [EMAIL PROTECTED] Subject: Re: [Flexradio] Mute for SDR Receiver Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a mute function before this. -- Larry Larry Taft K2LT T and T Measurements drakerepair.com 800-687-9161
Re: [Flexradio] Mute for SDR Receiver
Eric, Make sure to allow the user to select if the input is a mute or an unmute by having a check box for the sex of the input. Richard W5SXD Eric Wachsmann - FlexRadio [EMAIL PROTECTED] wrote: (12/14/2005 17:28) The solution Larry and I discussed was an audio only fix that does not handle the RF side at all. We will be testing an Auto Mute function using X2-12 as an input. Grounding this input will assert the Mute function as it exists today. RF switching will need to be handled separately and should be considered carefully as others have noted that there _are_ reasonable limits (say what?) to what you can put into the SDR-1000 front end. I'll let the hardware experts talk about what those limits are. ;) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:06 PM To: Larry W8ER; [EMAIL PROTECTED]; 'Flex Reflector'; Jim Lux Subject: Re: Re: [Flexradio] Mute for SDR Receiver Eric has to consider the protection of the front end of the receiver when muting as I'm sure there is a max limit that can't be exceeded. My TEK analyzer says Max +20 dbm on the input. Cost me $2200 to get it fixed the last time I didn't pay attention. Any leakage data on the various antenna relays available? Larry K2LT From: Larry W8ER [EMAIL PROTECTED] Date: 2005/12/14 Wed PM 10:18:55 WET To: [EMAIL PROTECTED], 'Flex Reflector' [EMAIL PROTECTED] radio.biz, Jim Lux [EMAIL PROTECTED] Subject: Re: [Flexradio] Mute for SDR Receiver Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a mute function before this. -- Larry Larry Taft K2LT T and T Measurements drakerepair.com 800-687-9161 ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Mute for SDR Receiver
Meaning the polarity of the switch? I didn't implement that in my first pass, but that's a simple thing to add if necessary. Eric Wachsmann FlexRadio Systems -Original Message- From: richard allen [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:47 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; 'Larry W8ER'; 'Flex Reflector'; 'Jim Lux' Subject: Re: [Flexradio] Mute for SDR Receiver Eric, Make sure to allow the user to select if the input is a mute or an unmute by having a check box for the sex of the input. Richard W5SXD Eric Wachsmann - FlexRadio [EMAIL PROTECTED] wrote: (12/14/2005 17:28) The solution Larry and I discussed was an audio only fix that does not handle the RF side at all. We will be testing an Auto Mute function using X2-12 as an input. Grounding this input will assert the Mute function as it exists today. RF switching will need to be handled separately and should be considered carefully as others have noted that there _are_ reasonable limits (say what?) to what you can put into the SDR-1000 front end. I'll let the hardware experts talk about what those limits are. ;) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:06 PM To: Larry W8ER; [EMAIL PROTECTED]; 'Flex Reflector'; Jim Lux Subject: Re: Re: [Flexradio] Mute for SDR Receiver Eric has to consider the protection of the front end of the receiver when muting as I'm sure there is a max limit that can't be exceeded. My TEK analyzer says Max +20 dbm on the input. Cost me $2200 to get it fixed the last time I didn't pay attention. Any leakage data on the various antenna relays available? Larry K2LT From: Larry W8ER [EMAIL PROTECTED] Date: 2005/12/14 Wed PM 10:18:55 WET To: [EMAIL PROTECTED], 'Flex Reflector' [EMAIL PROTECTED] radio.biz, Jim Lux [EMAIL PROTECTED] Subject: Re: [Flexradio] Mute for SDR Receiver Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a mute function before this. -- Larry Larry Taft K2LT T and T Measurements drakerepair.com 800-687-9161 ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Mute for SDR Receiver
Meaning in one setting grounding the pin will mute. In the other, grounding the pin will unmute. Some radios had an enable; others had a mute. I assume the pin has a pullup resistor? -Original Message- From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:49 PM To: 'richard allen' Cc: [EMAIL PROTECTED]; 'Larry W8ER'; 'Flex Reflector'; 'Jim Lux' Subject: RE: [Flexradio] Mute for SDR Receiver Meaning the polarity of the switch? I didn't implement that in my first pass, but that's a simple thing to add if necessary. Eric Wachsmann FlexRadio Systems -Original Message- From: richard allen [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:47 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; 'Larry W8ER'; 'Flex Reflector'; 'Jim Lux' Subject: Re: [Flexradio] Mute for SDR Receiver Eric, Make sure to allow the user to select if the input is a mute or an unmute by having a check box for the sex of the input. Richard W5SXD Eric Wachsmann - FlexRadio [EMAIL PROTECTED] wrote: (12/14/2005 17:28) The solution Larry and I discussed was an audio only fix that does not handle the RF side at all. We will be testing an Auto Mute function using X2-12 as an input. Grounding this input will assert the Mute function as it exists today. RF switching will need to be handled separately and should be considered carefully as others have noted that there _are_ reasonable limits (say what?) to what you can put into the SDR-1000 front end. I'll let the hardware experts talk about what those limits are. ;) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:06 PM To: Larry W8ER; [EMAIL PROTECTED]; 'Flex Reflector'; Jim Lux Subject: Re: Re: [Flexradio] Mute for SDR Receiver Eric has to consider the protection of the front end of the receiver when muting as I'm sure there is a max limit that can't be exceeded. My TEK analyzer says Max +20 dbm on the input. Cost me $2200 to get it fixed the last time I didn't pay attention. Any leakage data on the various antenna relays available? Larry K2LT From: Larry W8ER [EMAIL PROTECTED] Date: 2005/12/14 Wed PM 10:18:55 WET To: [EMAIL PROTECTED], 'Flex Reflector' [EMAIL PROTECTED] radio.biz, Jim Lux [EMAIL PROTECTED] Subject: Re: [Flexradio] Mute for SDR Receiver Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a mute function before this. -- Larry Larry Taft K2LT T and T Measurements drakerepair.com 800-687-9161 ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
