[amsat-bb] Re: Auto-Tune
I believe that automatic tuning of the downlink receiver will only work with FM, as an output of the FM discriminator can be used to give an error (difference) signal for tuning. I don't believe this is possible with an arbitrary SSB signal. The only way SSB/CW can work is to have a known signal to analyze, such as digital or a single CW communication channel. The software used to decode AO-40 middle beacon, for example, was capable of providing a tuning output, and I've seen CW and PSK sound card software do some limited tracking as well. But a random (i.e. voice) SSB signal? Don't think that's possible. Greg KO6TH From: luclebla...@videotron.ca To: amsat-bb@amsat.org Date: Mon, 30 Nov 2009 00:20:58 -0500 Subject: [amsat-bb] Re: Auto-Tune On 29 Nov 2009 at 23:52, RFI-EMI-GUY wrote: Date sent:Sun, 29 Nov 2009 23:52:50 -0500 From: RFI-EMI-GUY rhyol...@nettally.com Subject: [amsat-bb] Auto-Tune To: amsat-bb@amsat.org Send reply to:rhyol...@nettally.com Organization: Central Scrutinizer I have been having a debate with my son about the overuse of Auto-Tune in music. Personally, I find it irritating. Then it occurred to me that I had proposed on this BB a long time ago that it would be nifty to have a DSP (Like Timewave DSP-599) that would correct for doppler. Has anyone tried Auto-Tune to correct doppler on a linear transponder? -- Joe Leikhim K4SAT The RFI-EMI-GUY© A variation used here. On my PCR 1000 i correct the doppler on my 2.4 GHZ downconverter IF with the AFC frequency tuning. It is effective but signal should be always present it loose track in the signal fades but easily corrected manually. Never tested yet on a SSB or CW signal only on FM. - Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe DSTAR urcall VE2DWE WAC BASIC CW PHONE SATELLITE ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb _ Bing brings you maps, menus, and reviews organized in one place. http://www.bing.com/search?q=restaurantsform=MFESRPpubl=WLHMTAGcrea=TEXT_MFESRP_Local_MapsMenu_Resturants_1x1 ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Auto-Tune
At 07:08 PM 11/30/2009, Greg D. wrote: I believe that automatic tuning of the downlink receiver will only work with FM, as an output of the FM discriminator can be used to give an error (difference) signal for tuning. I don't believe this is possible with an arbitrary SSB signal. The only way SSB/CW can work is to have a known signal to analyze, such as digital or a single CW communication channel. The software used to decode AO-40 middle beacon, for example, was capable of providing a tuning output, and I've seen CW and PSK sound card software do some limited tracking as well. But a random (i.e. voice) SSB signal? Don't think that's possible. I have heard of it being done in a laboratory/research setting (though not 100% sure how good my sources were), but not in production. 73 de VK3JED / VK3IRL http://vkradio.com ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Auto-Tune
The Auto-Tune software used by musicians, apparently can determine the spectral center of human voice and lock it to a particular musical key. If the same software were to be modified to identify when the pitch moved beyond a preset point (IF passband), then the receiver frequency could be automatically slewed by CIV or CAT serial commands. Imagine a standalone DSP like the Timewave having this feature. -Original Message- From: Art McBride kc6...@cox.net Sent 11/30/2009 12:41:37 AM To: rhyol...@nettally.com Subject: RE: [amsat-bb] Auto-TuneJoe, You have the IF pass band to consider. AFC on FM works well, commercially SSB receivers were designed to lock on to a -16dB pilot carrier but, Amateur radios do not have that option for either mode. Your Auto-Tune Idea could work on CW as long as it could also increment the receiver LO to keep the signal inside the IF pass-band. Art, KC6UQH -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of RFI-EMI-GUY Sent: Sunday, November 29, 2009 8:53 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Auto-Tune I have been having a debate with my son about the overuse of Auto-Tune in music. Personally, I find it irritating. Then it occurred to me that I had proposed on this BB a long time ago that it would be nifty to have a DSP (Like Timewave DSP-599) that would correct for doppler. Has anyone tried Auto-Tune to correct doppler on a linear transponder? -- Joe Leikhim K4SAT The RFI-EMI-GUYC Use only Genuine Interocitor Parts Tom Servo ;-P ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb __ Information from ESET NOD32 Antivirus, version of virus signature database 4647 (20091129) __ The message was checked by ESET NOD32 Antivirus.http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4647 (20091129) __ The message was checked by ESET NOD32 Antivirus.http://www.eset.com ��___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Auto-Tune
True, but why are we generally obsessed with carrier leak (or a lack of it) on SSB signals? A bit of leak, say 20-30dB below peak, would allow for synchronous detectors and frequency tracking of drifting signals by the radio, no computer involved. Greg D. wrote: I believe that automatic tuning of the downlink receiver will only work with FM, as an output of the FM discriminator can be used to give an error (difference) signal for tuning. I don't believe this is possible with an arbitrary SSB signal. The only way SSB/CW can work is to have a known signal to analyze, such as digital or a single CW communication channel. The software used to decode AO-40 middle beacon, for example, was capable of providing a tuning output, and I've seen CW and PSK sound card software do some limited tracking as well. But a random (i.e. voice) SSB signal? Don't think that's possible. ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Auto-Tune
Hi Joe, I didn't know about auto tuners used by musicians. About 5 years ago I had a similar idea for tuning the Doppler without computer control. Thought it would be a neat feature inside a transciever so sent the idea to Yaesu Japan but got no reply. 73 John G7HIA From: Joe Leikhim rhyol...@nettally.com To: kc6...@cox.net Cc: AMSAT-BB@amsat.org Sent: Monday, 30 November, 2009 14:08:45 Subject: [amsat-bb] Re: Auto-Tune The Auto-Tune software used by musicians, apparently can determine the spectral center of human voice and lock it to a particular musical key. If the same software were to be modified to identify when the pitch moved beyond a preset point (IF passband), then the receiver frequency could be automatically slewed by CIV or CAT serial commands. Imagine a standalone DSP like the Timewave having this feature. -Original Message- From: Art McBride kc6...@cox.net Sent 11/30/2009 12:41:37 AM To: rhyol...@nettally.com Subject: RE: [amsat-bb] Auto-TuneJoe, You have the IF pass band to consider. AFC on FM works well, commercially SSB receivers were designed to lock on to a -16dB pilot carrier but, Amateur radios do not have that option for either mode. Your Auto-Tune Idea could work on CW as long as it could also increment the receiver LO to keep the signal inside the IF pass-band. Art, KC6UQH -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of RFI-EMI-GUY Sent: Sunday, November 29, 2009 8:53 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Auto-Tune I have been having a debate with my son about the overuse of Auto-Tune in music. Personally, I find it irritating. Then it occurred to me that I had proposed on this BB a long time ago that it would be nifty to have a DSP (Like Timewave DSP-599) that would correct for doppler. Has anyone tried Auto-Tune to correct doppler on a linear transponder? -- Joe Leikhim K4SAT The RFI-EMI-GUYC Use only Genuine Interocitor Parts Tom Servo ;-P ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb __ Information from ESET NOD32 Antivirus, version of virus signature database 4647 (20091129) __ The message was checked by ESET NOD32 Antivirus.http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4647 (20091129) __ The message was checked by ESET NOD32 Antivirus.http://www.eset.com �� ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Auto-Tune
On 29 Nov 2009 at 23:52, RFI-EMI-GUY wrote: Date sent: Sun, 29 Nov 2009 23:52:50 -0500 From: RFI-EMI-GUY rhyol...@nettally.com Subject:[amsat-bb] Auto-Tune To: amsat-bb@amsat.org Send reply to: rhyol...@nettally.com Organization: Central Scrutinizer I have been having a debate with my son about the overuse of Auto-Tune in music. Personally, I find it irritating. Then it occurred to me that I had proposed on this BB a long time ago that it would be nifty to have a DSP (Like Timewave DSP-599) that would correct for doppler. Has anyone tried Auto-Tune to correct doppler on a linear transponder? -- Joe Leikhim K4SAT The RFI-EMI-GUY© A variation used here. On my PCR 1000 i correct the doppler on my 2.4 GHZ downconverter IF with the AFC frequency tuning. It is effective but signal should be always present it loose track in the signal fades but easily corrected manually. Never tested yet on a SSB or CW signal only on FM. - Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe DSTAR urcall VE2DWE WAC BASIC CW PHONE SATELLITE ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
