Re: [Flexradio] 1.9.0 svn806X Available (160M BCI Rejection Wave Recorder/Player Updates)
The BCI filter would be my vote for software mod of the year 2007 -- and I know it's only January. The wider panadapter would be my vote for 2006. The BCI (AM Radio Broadcast Interference) Rejection is something new to the SDR. If you live near strong AM stations they may be causing front end overload. If you operate on 160 and find carriers every 10kHz and a high noise floor this is for you. My noise floor is S9 +10db with carriers at S9 +25db. With the BCI Reduction activated the noise floor drops to S6 and NO Broadcast carriers. That's more than a 35db improvement during the day. It's even better at night when the atmospheric noise goes down! I now get down to S3 at times. I worked G4UFK on 160 SSB last night. It would not have been possible without this feature. ___ 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 Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] 1.9.0 svn806X Available (160M BCI Rejection Wave Recorder/Player Updates)
I second the suggestion to augment reception LF and VLF signals, if practical. I like to DX European LF brodacsters and am forced to blow the the dust off my TS-850 to do so. LF and VLF reception is a current weak spot in an otherwise outstanding radio. Carmine W1EQX - Original Message From: Jerry Sharp [EMAIL PROTECTED] To: flexradio@flex-radio.biz Sent: Wednesday, January 3, 2007 8:20:52 PM Subject: Re: [Flexradio] 1.9.0 svn806X Available (160M BCI Rejection Wave Recorder/Player Updates) John, thanks for the reply. Yes, switching over to an active receive only antenna I do see a difference now. My noise floor is above -100 dbm and the broadcast stations are being knocked way down. Guess I should have known there would be a threshold level. I also notice that stations are being attenuated by 20 to 30 db within the broadcast band. Ok, here's a request..which I suspect isn't possible..how about attenuation only between 540 KC and 1700 KC so I can listen to LF and VLF signals without having to use a bunch of low and high pass filters in my feedline? :) Thanks and 73, Jerry Sharp, KD0GS [EMAIL PROTECTED] wrote: Hi Gerald, It is working as it should. Late at night (1AM) it is common for me to get 50-55 db reduction in spurious responses. But it is a function of the RX being truly overloaded and how low the true ambient noise is. In your case there simply isn't a lot of signal at the receiver and the BCI Rejection isn't needed. 'BCI Rejection' will limit week signal reception to just under S3. That's why it can be turned on/off. On my dipole the quietest it ever gets is S5. On the beverage RX ant it's a little over S3. One other thing to mention; Sometimes you will here AM stations not because the receiver is generating the spurious due to overload, but because the station is actually putting power in the 160M band via harmonics. Thanks for the report. 73, John - Hi John, I just downloaded SVN 807X and I'm seeing my noise floor increase by at least 10 db when I activate the BCI Rejection. BCI interference increases the same amount. I'm using the Delta 44 soundcard. Maybe something I need to change in my settings? I will tell you that my antenna performs poorly on 160 meters, my typical daytime noise floor is 120 dbm. But I do get weak but readable BCB carriers all over the band. Regards, Gerald Sharp, KD0GS ___ 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 Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.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 Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070104/2724954e/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 Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] 1.9.0 svn806X Available (160M BCI Rejection Wave Recorder/Player Updates)
Hi John, I just downloaded SVN 807X and I'm seeing my noise floor increase by at least 10 db when I activate the BCI Rejection. BCI interference increases the same amount. I'm using the Delta 44 soundcard. Maybe something I need to change in my settings? I will tell you that my antenna performs poorly on 160 meters, my typical daytime noise floor is 120 dbm. But I do get weak but readable BCB carriers all over the band. Regards, Gerald Sharp, KD0GS [EMAIL PROTECTED] wrote: svn://206.216.146.154/svn/repos_sdr_windows/PowerSDR/branches/k2ox/PowerSDR/tags/PowerSDR1.9.0X/bin/Release Hello All, I've updated v1.9.0 svn 806 to include the wave player/recorder and a new BCI Rejection scheme. The player is the same as the one used in v1.6.3 svn 724A with one exception. This one properly sets the TX audio level on startup. The BCI (AM Radio Broadcast Interference) Rejection is something new to the SDR. If you live near strong AM stations they may be causing front end overload. If you operate on 160 and find carriers every 10kHz and a high noise floor this is for you. My noise floor is S9 +10db with carriers at S9 +25db. With the BCI Reduction activated the noise floor drops to S6 and NO Broadcast carriers. That's more than a 35db improvement during the day. It's even better at night when the atmospheric noise goes down! I now get down to S3 at times. I worked G4UFK on 160 SSB last night. It would not have been possible without this feature. The easiest way to see if you are being 'de-sensed' is to go to 160M and click the 'BCI Reduction' button on and off. If the noise floor drops and the carriers on 1.830, 1.840, 1.850 ... disappear, that's a sure sign. The real signals will jump right out of the noise! On the other hand, if you're lucky enough to live far from strong broadcast stations you may not find a need for this feature. I'll put some pictures and explanation on my web site later. Let us know what you think. 73, John k2ox -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070103/b5d6a8ee/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 Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.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 Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] 1.9.0 svn806X Available (160M BCI Rejection Wave Recorder/Player Updates)
John, thanks for the reply. Yes, switching over to an active receive only antenna I do see a difference now. My noise floor is above -100 dbm and the broadcast stations are being knocked way down. Guess I should have known there would be a threshold level. I also notice that stations are being attenuated by 20 to 30 db within the broadcast band. Ok, here's a request..which I suspect isn't possible..how about attenuation only between 540 KC and 1700 KC so I can listen to LF and VLF signals without having to use a bunch of low and high pass filters in my feedline? :) Thanks and 73, Jerry Sharp, KD0GS [EMAIL PROTECTED] wrote: Hi Gerald, It is working as it should. Late at night (1AM) it is common for me to get 50-55 db reduction in spurious responses. But it is a function of the RX being truly overloaded and how low the true ambient noise is. In your case there simply isn't a lot of signal at the receiver and the BCI Rejection isn't needed. 'BCI Rejection' will limit week signal reception to just under S3. That's why it can be turned on/off. On my dipole the quietest it ever gets is S5. On the beverage RX ant it's a little over S3. One other thing to mention; Sometimes you will here AM stations not because the receiver is generating the spurious due to overload, but because the station is actually putting power in the 160M band via harmonics. Thanks for the report. 73, John - Hi John, I just downloaded SVN 807X and I'm seeing my noise floor increase by at least 10 db when I activate the BCI Rejection. BCI interference increases the same amount. I'm using the Delta 44 soundcard. Maybe something I need to change in my settings? I will tell you that my antenna performs poorly on 160 meters, my typical daytime noise floor is 120 dbm. But I do get weak but readable BCB carriers all over the band. Regards, Gerald Sharp, KD0GS ___ 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 Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.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 Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] 1.9.0 svn806X Available (160M BCI Rejection Wave Recorder/Player Updates)
John, This works great! I also very much appreciate the fact that you have added several options to the Wave recording, in particular the ability to specify where to store the wave files. Something I requested a long time ago. Thanks Again! Brian / w5ami -- Suburbia is where the developer bulldozes out the trees, then names the streets after them. - Bill Vaughan ___ 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 Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
