Re: [Flexradio] FlexRadio Digest, Vol 30, Issue 21
-Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Rob Moore Envoyé : dimanche 21 octobre 2007 23:58 À : flexradio@flex-radio.biz Objet : Re: [Flexradio] FlexRadio Digest, Vol 30, Issue 21 Rob, I have an SDR-100 as well which I use primarily for SWL'ing. I've been aggravated by the DC Hump as well and like you am wondering what can be done about it. I also have an SDR-IQ which isn't quite as sensitive as the SDR-1000 but works quite well and has no sign on the hump. I know that the SDR-IQ doesn't use a sound card and instead has the I_Q demodulator and decimator on board so perhaps that's why it doesn't have any hump, but it seems like this is a design defect with t he SDR-1000 that could be solved with a little effort. Rob (coincidence!) SDR-IQ and SDR-1000 are completely different designs, the SDR-IQ have the ADC on HF, there is no mixing process. For information, SDR-1000 with janus-Ozy gives an unnoticeable hump... 73, Roland f8chk. ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ 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://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
[Flexradio] Buffer / Sample Rate
I hear some people are using 192k sampling rate with 256k buffering. Are they doing this in safe mode 1 or in the normal mode? I am running an Intel duel processor 2.4 with 4 gigs of memory with the two high speed 7200 rpm western digital hard drives in a Raid 0 configuration using XP for the operator system. The rig is the new Flex5000. The Power SDR seems to run its best at 192K sampling rate but at 512K for the Buffer in the Normal mode. I have tried the 256k buffering and it ends up crashing. Any input on all of this would be a great help to aid towards my understanding! Thank you. Ken K3YI ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
[Flexradio] Post Contest Report
I'm again the high JARTS scorer in zip code 60706 8040 were my concentrated effort, as that's where I have the poorest antennas. Although I did work a alltime new rtty band/entity on 15 meters, C9 I concentrated on 'running' and did have a few problems. One problem with HotWheels, you loose the use of the NumPad, as any character that also serves as directionals, changes PWSDR bands or modes. So I have to remember (not easy) to use the keyboard numbers. But I had good success with my dual vfo system. Tuneing off frequency replies using vfoa and then clicking on the 'Restore' button for a fast return to proper listening frequency. But I got a surprise when 15 and 20 opened in the early morning. Either the Flex5Ka has the hottest receiver in the universe, or there was 'one way prop' as I could hear the Euro/Asian station, loud, but they couldn't hear me. That lasted till late, almost noon my time. Then they could hear me. I did have a brain fart and caused myself a lot of rfi induced problems. I got overheating messages, and a couple of lockups. this was with 35 watts drive, pushing the Quadra to 500+/- watts output. I finally remembered that I'd connected my 6 meter antenna to antenna port 3, and due to high winds in Chicago, I'd nested my tower resulting in dipoles being in close proximity to the 6 meter Halo. Apparently enough feedback was getting into the Flex5Ka. Disconnecting that coax solved the problem. But I still made over 500 qsos, with only about 16 hours of on time. I still worry about the temp reading but suspect that it's not that accurate, and that it's also rfi effected. Because it will go yellow, but almost instantly upon transmission ending, it reverts to 40-48C range. Maybe one of the readers can shed some light on a possible source of rf input that I can check out. I did upload the new firmware, kept my fingers crossed, but had the instructions on one screen and followed step for step and it worked pefectly. But I can't say as I saw any performance difference. Each week I learn something new. Looking forward to next weekends contests. - Don't hate yourself in the morning, sleep until noon. - Bill H. in Chicagoland webcams at http://76.16.160.118:8080/ weather at http://hhweather.webhop.org ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
[Flexradio] Receive Equalizer
Hi, I have been using the receive equalizer to reduce some of the high frequency audio noise on the SDR-1000 which is particularity annoying when using NR. The audio noise is a problem only on voice modes such as SSB. However, when I use digital modes, the audio bandwidth is greater than for voice, and the equalizer adversely affects the receive audio bandwidth in the digital programs. I use a bandwidth of 5 KHz on the SDR-1000 for digital modes, and set MixW so one receive channel is receiving 0-5KHz and the other 100-3KHz audio, which shows any signal in the filter bandwidth but gives more resolution in the 0-3KHz range. The equalizer when set to reduce the HF audio noise in SSB, reduces the gain on the display above about 2.8KHz, plus it is broadly peaked around 2KHz. Similarly, there is a problem on the sound card RTTY programs such as MMTTY. Any one have the same problem? I plan to submit an enhancement request to either have a mode specific receive equalizer, or disable the receive equalizer on the digital modes as the transmit equalizer is disabled. I think having a separate setting of the equalizer both for receive and transmit for digital modes is a better choice than disabling it, as the peak around 2KHz can be easily corrected with the equalizer, giving a more flat response over the audio bandwidth for both receive and transmit. Chas W1CG ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Receive Equalizer
Chas, I agree that the RX EQ setting should be saved, but save it along with the TX EQ settings in the TX Profiles. That way you can associate a TX profile with a particular operating mode rather than being restricted to just one RX EQ setting for a particular mode of operation. I have several TX profiles for digital modes and separate RX EQ settings would be nice. Sounds like a great enhancement. -Tim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Charles Greene Sent: Monday, October 22, 2007 10:49 AM To: FlexRadio@flex-radio.biz Subject: [Flexradio] Receive Equalizer Hi, I have been using the receive equalizer to reduce some of the high frequency audio noise on the SDR-1000 which is particularity annoying when using NR. The audio noise is a problem only on voice modes such as SSB. However, when I use digital modes, the audio bandwidth is greater than for voice, and the equalizer adversely affects the receive audio bandwidth in the digital programs. I use a bandwidth of 5 KHz on the SDR-1000 for digital modes, and set MixW so one receive channel is receiving 0-5KHz and the other 100-3KHz audio, which shows any signal in the filter bandwidth but gives more resolution in the 0-3KHz range. The equalizer when set to reduce the HF audio noise in SSB, reduces the gain on the display above about 2.8KHz, plus it is broadly peaked around 2KHz. Similarly, there is a problem on the sound card RTTY programs such as MMTTY. Any one have the same problem? I plan to submit an enhancement request to either have a mode specific receive equalizer, or disable the receive equalizer on the digital modes as the transmit equalizer is disabled. I think having a separate setting of the equalizer both for receive and transmit for digital modes is a better choice than disabling it, as the peak around 2KHz can be easily corrected with the equalizer, giving a more flat response over the audio bandwidth for both receive and transmit. Chas W1CG ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ 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://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] E-HAM SDR DISCUSSION A PERSONAL QSO THE OTHER NIGHT
As a FLEX-500 owner, I am not sure that a MINE IS BIGGER THAN YOURS attitude will bring anybody over to SDR. I don't think just to twist his Brian housing group a little bit, I knew that this guy was going to have a wise ass coment (sp) and I thought that this old guy was going to blow a gasket is the kind of advertisement that is going to win anybody over to SDR. Paul M. Segal W9EEA (1928) put it best in the Amateur Code of Conduct: THE AMATEUR IS FRIENDLY slow and patient operating when requested; friendly advice and counsel to the beginner; kindly assistance, cooperation and consideration for the interests of others. These are the hallmarks of the amateur spirit. Good amateur radio practices and mentoring discussions about SDR, to those intrested, will do more to educate the masses. More is learned by those reading the mail than open confrontation. I have my 5000 and I love it. But I don't understand how it matters that soemone else doesn't want to know how they work or want one. I also don't understand how buying (not designing), a new peice of hardware makes someone smarter or better than the next guy! Thankfully I ran into some mentoring hams in the late 1950's when I became interested in ham radio and some mentoring SDR-1000 owners as I did my reasearch on buying a Flex-Radio. 73 de John AD7DP - - --- Oh what timing this article brings :) http://www.eham.net/articles/17604 I was in QSO on 20M the other night with an older gentleman from Maine. He was using his Pro 3 and I was using my Flex 5K. This genteman was and older fellow and was the ornery, know it all type who seemed to enjoy out doing and out talking the other person that he was taking to in the QSO. . The way that he had talked to some of his other QSO's, I can see why most of them cut the QSO short and moved on. I had been listening to him for about a half hour or so before I decided to come back to his CQ just to twist his brian housing group a little bit:). Anyways, after signal report, location. etc., I just had to tell me about my station as I knew that this guy was going to have a wise ass coment about it. I told him that I was running a Flex SDR-5000 which is a software defined radio connected to a HP qaud core computer that was really the brains of the whole setup/station. I was bragging about my band scope of 192K and the advantage of it over most other radios that had band scopes and how my band scope provided more data than just knowing that a certain frequency was occupied (Like HIS Pro3 ) LOL. Well, I thought that this old guy was going to blow a gasket or something. He laid into me about my Flex 5K not being a REAL radio but just a computer with a BOX attached to it and that he did not like talking to people that were not using REAL radios. I gave him a brief introdction to SDR's and explained that my Flex 5K would compete with just about anything out there (including his Pro 3) which really set him off. LOL After laughing at him a bit, I thanked him for the QSO and then signed off. This guy is/was a perfect example of a person that had no idea of what he was talking about when it came to Flex, or SDR technology in general. The only thing that he knew was that he was running one of ICOM's premiere HF radios and that it had knobs and buttons (and a band scope) and that MY radio was just some sort of stupid HF radio experiment that needs a computer to make it work (and had no knobs or buttons). He also said that it would not last very long either :) Sound familiar?? 73 de Paul Zora K3PZ Port Saint Lucie, FL www.k3pz.com -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio biz/attachments/20071012/a132bdbe/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/ -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.488 / Virus Database: 269.15.1/1078 - Release Date: 10/18/2007 5:47 PM . -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20071022/c5b0416d/attachment.html -- next part -- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 1458 bytes Desc: not available Url : http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20071022/c5b0416d/attachment.jpe ___ FlexRadio mailing list FlexRadio@flex
Re: [Flexradio] Buffer / Sample Rate
Ken, Try increasing the Driver buffer size. John P. Basilotto W5GI Chief Operating Officer Marketing and Sales Office 512 535-5266 FAX512 233-5143 www.flex-radio.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ken Sent: Monday, October 22, 2007 8:03 AM To: FlexRadio@flex-radio.biz Subject: [Flexradio] Buffer / Sample Rate I hear some people are using 192k sampling rate with 256k buffering. Are they doing this in safe mode 1 or in the normal mode? I am running an Intel duel processor 2.4 with 4 gigs of memory with the two high speed 7200 rpm western digital hard drives in a Raid 0 configuration using XP for the operator system. The rig is the new Flex5000. The Power SDR seems to run its best at 192K sampling rate but at 512K for the Buffer in the Normal mode. I have tried the 256k buffering and it ends up crashing. Any input on all of this would be a great help to aid towards my understanding! Thank you. Ken K3YI ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ 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://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Buffer / Sample Rate
I agree ... my best preformance is 512/192 .. but it runs fine at 256/192 ..now this is a Intel dual/6700 with 4 Gigs..and the only item on the machine is the 5000A. John: I upgraded SVN today and see that there are now Buffers for TX RX ..explain the merits...?? Also I sweep the the headphone and the Line Out (out to 7K) and they both are flat, with one of the best return audio's I have ever heard from a transceiver...(Even better then the Kenwood 870) With out a print I am assuming the line out is mono and unbalanced...the headphone is Stereo. But what is the pick up on the headphone's right left Channels..?? Bill KC4PE - Original Message - From: john [EMAIL PROTECTED] To: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz Sent: Monday, October 22, 2007 5:00 PM Subject: Re: [Flexradio] Buffer / Sample Rate Ken, Try increasing the Driver buffer size. John P. Basilotto W5GI Chief Operating Officer Marketing and Sales Office 512 535-5266 FAX512 233-5143 www.flex-radio.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ken Sent: Monday, October 22, 2007 8:03 AM To: FlexRadio@flex-radio.biz Subject: [Flexradio] Buffer / Sample Rate I hear some people are using 192k sampling rate with 256k buffering. Are they doing this in safe mode 1 or in the normal mode? I am running an Intel duel processor 2.4 with 4 gigs of memory with the two high speed 7200 rpm western digital hard drives in a Raid 0 configuration using XP for the operator system. The rig is the new Flex5000. The Power SDR seems to run its best at 192K sampling rate but at 512K for the Buffer in the Normal mode. I have tried the 256k buffering and it ends up crashing. Any input on all of this would be a great help to aid towards my understanding! Thank you. Ken K3YI ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ 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://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ 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://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] Receive Equalizer
Tim, How do you do that, ie, save EQ profiles? Actually, the receive bandpass is perfectly flat using DIGU with the receive equalizer reset to zero. It's just that on SSB, you need to use it, and it is active on DIGU receive. Transmit is where you really need an equalizer. I measured the power output from 500 Hz to 4 KHz, and the power varies, dropping off at the higher frequencies. Power output was 20 watts (arbitrary) at 500 Hz and down to about 5 watts at 4KHz, or when the power output is 20 watts at 3KHz, it is 45 watts at 500Hz. The transmit equalizer has no effect using DIGU. TX filter set at 400 to 4500 Hz, mode PSK31 on MixW, Drive 100, controlling output with TX gain. With the SDR mode on USB and controlling the output with the Drive control, the level can easily be equalized to 45 watts from 500 to 3500 Hz. So where we need the TX equalizer, it is disabled and where we need the RX equalizer to be disabled, it is active. 73, Chas At 11:26 AM 10/22/2007, you wrote: Chas, I agree that the RX EQ setting should be saved, but save it along with the TX EQ settings in the TX Profiles. That way you can associate a TX profile with a particular operating mode rather than being restricted to just one RX EQ setting for a particular mode of operation. I have several TX profiles for digital modes and separate RX EQ settings would be nice. Sounds like a great enhancement. -Tim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Charles Greene Sent: Monday, October 22, 2007 10:49 AM To: FlexRadio@flex-radio.biz Subject: [Flexradio] Receive Equalizer Hi, I have been using the receive equalizer to reduce some of the high frequency audio noise on the SDR-1000 which is particularity annoying when using NR. The audio noise is a problem only on voice modes such as SSB. However, when I use digital modes, the audio bandwidth is greater than for voice, and the equalizer adversely affects the receive audio bandwidth in the digital programs. I use a bandwidth of 5 KHz on the SDR-1000 for digital modes, and set MixW so one receive channel is receiving 0-5KHz and the other 100-3KHz audio, which shows any signal in the filter bandwidth but gives more resolution in the 0-3KHz range. The equalizer when set to reduce the HF audio noise in SSB, reduces the gain on the display above about 2.8KHz, plus it is broadly peaked around 2KHz. Similarly, there is a problem on the sound card RTTY programs such as MMTTY. Any one have the same problem? I plan to submit an enhancement request to either have a mode specific receive equalizer, or disable the receive equalizer on the digital modes as the transmit equalizer is disabled. I think having a separate setting of the equalizer both for receive and transmit for digital modes is a better choice than disabling it, as the peak around 2KHz can be easily corrected with the equalizer, giving a more flat response over the audio bandwidth for both receive and transmit. Chas W1CG ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ 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://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
Re: [Flexradio] 11kHz DC noise
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Re: [Flexradio] FlexRadio Digest, Vol 30, Issue 21
Rob, Let me confirm Roland's statement that the DC hump has nothing to do with the SDR-1000 and everything to do with the sound card. Better cards have lower DC offset and/or noise. The FLEX-5000 does not have this hump because it uses a built in high performance A/D converter (i.e. no hump). Janus/Ozy offers the best performance for SDR-1000 use. 73, Gerald Gerald Youngblood, K5SDR FlexRadio Systems Ph: 512-535-4713 Fax: 512-233-5143 Email: [EMAIL PROTECTED] Web: www.flex-radio.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Roland Etienne Sent: Monday, October 22, 2007 1:50 AM To: 'Rob Moore'; flexradio@flex-radio.biz Subject: Re: [Flexradio] FlexRadio Digest, Vol 30, Issue 21 -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Rob Moore Envoyé : dimanche 21 octobre 2007 23:58 À : flexradio@flex-radio.biz Objet : Re: [Flexradio] FlexRadio Digest, Vol 30, Issue 21 Rob, I have an SDR-100 as well which I use primarily for SWL'ing. I've been aggravated by the DC Hump as well and like you am wondering what can be done about it. I also have an SDR-IQ which isn't quite as sensitive as the SDR-1000 but works quite well and has no sign on the hump. I know that the SDR-IQ doesn't use a sound card and instead has the I_Q demodulator and decimator on board so perhaps that's why it doesn't have any hump, but it seems like this is a design defect with t he SDR-1000 that could be solved with a little effort. Rob (coincidence!) SDR-IQ and SDR-1000 are completely different designs, the SDR-IQ have the ADC on HF, there is no mixing process. For information, SDR-1000 with janus-Ozy gives an unnoticeable hump... 73, Roland f8chk. ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ 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://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ 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://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
