Re: [Flexradio] SSB Carrier suppression on Preview 12
For what it's worth: I noticed some time ago that carrier suppression on my SDR1K varies from band to band, and is unaffected by the Tx Image cancellation settings. Suppression is worse at the higher bands, such as 10 meters. - Jeff, WA6AHL -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Tim Ellison Sent: Monday, February 06, 2006 7:02 PM To: Jerry; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] SSB Carrier suppression on Preview 12 Hey Jerry, I have both the monitoring and TX radio on dummy loads. As a check, I did the same test on my Pro II as I did with the SDR (using identical settings) and there is no carrier heard from the Pro II like there is on the SDR1000. I really believe the carrier is not being fully suppressed. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: Jerry [mailto:[EMAIL PROTECTED] Sent: Sunday, February 05, 2006 9:36 PM To: Tim Ellison Subject: Re: [Flexradio] SSB Carrier suppression on Preview 12 Hi Tim What S meter reading? It sounds as if the carrier is down many DB's. If there is any carrier it would blow out the front end of the monitoring radio. A fraction of a milliwatt would gove a S9++ signal. 73 de Jerry At 04:33 PM 2/5/2006 -0500, you wrote: Sure do. I just finished testing it on 20m USB with 1.4.5p12. If I have the TX set to 14.170 MHz and key the rig without modulating, I begin to hear an unsuppressed carrier on a separate receiver starting at 14.17000 MHz (barely audible) which increases in intensity and pitch until a peak at 14.16690 MHz (very audible). It does this with versions 1.4.5p7 and 1.4.4. Version 1.4.4 sounds louder than 1.4.5p7. The difference between 1.4.5p7 and 1.4.5p12 is too close to tell by ear. I have no way to test this with a scope, so these observations are at best approximations. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dudley Hurry Sent: Sunday, February 05, 2006 1:55 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] SSB Carrier suppression on Preview 12 SDR Gang, I have received several reports while running Preview 12 of unsuppressed carrier. Sure enough it is strong enough to be heard and seen on a ProII receiver.And looking at the transmitted signal in the PowerSDR console, version 11's carrier appears to be roughly 55 db down from the voice peaks, whereas version 12 is only 30 db down.. Anyone else seen or hear this? Don't forget the SDR Net at 1400 Eastern on or around 14.313 MHz. Thanks, 73, Dudley WA5QPZ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] SSB Carrier suppression on Preview 12
I should also add - the carrier was present with version 1.4.4 - I haven't done any checking of suppression with Preview 12, as I think this issue is probably related to hardware, rather than software (i.e. possibly due to a parasitic imbalance in the TX-side QSD). - Jeff -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Jeff Anderson Sent: Tuesday, February 07, 2006 5:24 AM To: Tim Ellison; Jerry; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] SSB Carrier suppression on Preview 12 For what it's worth: I noticed some time ago that carrier suppression on my SDR1K varies from band to band, and is unaffected by the Tx Image cancellation settings. Suppression is worse at the higher bands, such as 10 meters. - Jeff, WA6AHL -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Tim Ellison Sent: Monday, February 06, 2006 7:02 PM To: Jerry; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] SSB Carrier suppression on Preview 12 Hey Jerry, I have both the monitoring and TX radio on dummy loads. As a check, I did the same test on my Pro II as I did with the SDR (using identical settings) and there is no carrier heard from the Pro II like there is on the SDR1000. I really believe the carrier is not being fully suppressed. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: Jerry [mailto:[EMAIL PROTECTED] Sent: Sunday, February 05, 2006 9:36 PM To: Tim Ellison Subject: Re: [Flexradio] SSB Carrier suppression on Preview 12 Hi Tim What S meter reading? It sounds as if the carrier is down many DB's. If there is any carrier it would blow out the front end of the monitoring radio. A fraction of a milliwatt would gove a S9++ signal. 73 de Jerry At 04:33 PM 2/5/2006 -0500, you wrote: Sure do. I just finished testing it on 20m USB with 1.4.5p12. If I have the TX set to 14.170 MHz and key the rig without modulating, I begin to hear an unsuppressed carrier on a separate receiver starting at 14.17000 MHz (barely audible) which increases in intensity and pitch until a peak at 14.16690 MHz (very audible). It does this with versions 1.4.5p7 and 1.4.4. Version 1.4.4 sounds louder than 1.4.5p7. The difference between 1.4.5p7 and 1.4.5p12 is too close to tell by ear. I have no way to test this with a scope, so these observations are at best approximations. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dudley Hurry Sent: Sunday, February 05, 2006 1:55 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] SSB Carrier suppression on Preview 12 SDR Gang, I have received several reports while running Preview 12 of unsuppressed carrier. Sure enough it is strong enough to be heard and seen on a ProII receiver.And looking at the transmitted signal in the PowerSDR console, version 11's carrier appears to be roughly 55 db down from the voice peaks, whereas version 12 is only 30 db down.. Anyone else seen or hear this? Don't forget the SDR Net at 1400 Eastern on or around 14.313 MHz. Thanks, 73, Dudley WA5QPZ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] SSB Carrier suppression on Preview 12
Have you tried nulling the transmitter image in Preview 12. It could be that the two databases have different values for the gain and phase on the TX image null. Gerald Gerald Youngblood, K5SDR President FlexRadio Systems 8900 Marybank Drive Austin, TX 78750 Ph: 512-250-8595 Email: [EMAIL PROTECTED] Web: www.flex-radio.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dudley Hurry Sent: Sunday, February 05, 2006 12:55 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] SSB Carrier suppression on Preview 12 SDR Gang, I have received several reports while running Preview 12 of unsuppressed carrier. Sure enough it is strong enough to be heard and seen on a ProII receiver.And looking at the transmitted signal in the PowerSDR console, version 11's carrier appears to be roughly 55 db down from the voice peaks, whereas version 12 is only 30 db down.. Anyone else seen or hear this? Don't forget the SDR Net at 1400 Eastern on or around 14.313 MHz. Thanks, 73, Dudley WA5QPZ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
Re: [Flexradio] SSB Carrier suppression on Preview 12
Hey Jerry, I have both the monitoring and TX radio on dummy loads. As a check, I did the same test on my Pro II as I did with the SDR (using identical settings) and there is no carrier heard from the Pro II like there is on the SDR1000. I really believe the carrier is not being fully suppressed. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: Jerry [mailto:[EMAIL PROTECTED] Sent: Sunday, February 05, 2006 9:36 PM To: Tim Ellison Subject: Re: [Flexradio] SSB Carrier suppression on Preview 12 Hi Tim What S meter reading? It sounds as if the carrier is down many DB's. If there is any carrier it would blow out the front end of the monitoring radio. A fraction of a milliwatt would gove a S9++ signal. 73 de Jerry At 04:33 PM 2/5/2006 -0500, you wrote: Sure do. I just finished testing it on 20m USB with 1.4.5p12. If I have the TX set to 14.170 MHz and key the rig without modulating, I begin to hear an unsuppressed carrier on a separate receiver starting at 14.17000 MHz (barely audible) which increases in intensity and pitch until a peak at 14.16690 MHz (very audible). It does this with versions 1.4.5p7 and 1.4.4. Version 1.4.4 sounds louder than 1.4.5p7. The difference between 1.4.5p7 and 1.4.5p12 is too close to tell by ear. I have no way to test this with a scope, so these observations are at best approximations. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dudley Hurry Sent: Sunday, February 05, 2006 1:55 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] SSB Carrier suppression on Preview 12 SDR Gang, I have received several reports while running Preview 12 of unsuppressed carrier. Sure enough it is strong enough to be heard and seen on a ProII receiver.And looking at the transmitted signal in the PowerSDR console, version 11's carrier appears to be roughly 55 db down from the voice peaks, whereas version 12 is only 30 db down.. Anyone else seen or hear this? Don't forget the SDR Net at 1400 Eastern on or around 14.313 MHz. Thanks, 73, Dudley WA5QPZ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
[Flexradio] SSB Carrier suppression on Preview 12
SDR Gang, I have received several reports while running Preview 12 of unsuppressed carrier. Sure enough it is strong enough to be heard and seen on a ProII receiver.And looking at the transmitted signal in the PowerSDR console, version 11's carrier appears to be roughly 55 db down from the voice peaks, whereas version 12 is only 30 db down.. Anyone else seen or hear this? Don't forget the SDR Net at 1400 Eastern on or around 14.313 MHz. Thanks, 73, Dudley WA5QPZ
Re: [Flexradio] SSB Carrier suppression on Preview 12
Sure do. I just finished testing it on 20m USB with 1.4.5p12. If I have the TX set to 14.170 MHz and key the rig without modulating, I begin to hear an unsuppressed carrier on a separate receiver starting at 14.17000 MHz (barely audible) which increases in intensity and pitch until a peak at 14.16690 MHz (very audible). It does this with versions 1.4.5p7 and 1.4.4. Version 1.4.4 sounds louder than 1.4.5p7. The difference between 1.4.5p7 and 1.4.5p12 is too close to tell by ear. I have no way to test this with a scope, so these observations are at best approximations. -Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dudley Hurry Sent: Sunday, February 05, 2006 1:55 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] SSB Carrier suppression on Preview 12 SDR Gang, I have received several reports while running Preview 12 of unsuppressed carrier. Sure enough it is strong enough to be heard and seen on a ProII receiver.And looking at the transmitted signal in the PowerSDR console, version 11's carrier appears to be roughly 55 db down from the voice peaks, whereas version 12 is only 30 db down.. Anyone else seen or hear this? Don't forget the SDR Net at 1400 Eastern on or around 14.313 MHz. Thanks, 73, Dudley WA5QPZ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
