Re: [Flexradio] Xmit rejection procedure Help
FYI the problem was solved (and it was operator error!). I had activated VAC (rather than just activating it for digital modes) since I also use it for cw decoding, etc. The transmit image rejection tone generation does not work with VAC enabled, which makes sense. So, now all is well! Thanks to Duffy and Tim in assisting e! Neal Campbell K3NC [EMAIL PROTECTED] telnet to our DX Spotting clusters at: dxc.k3nc.com, ports 12001 and 23 Devoted to Dogs: How to be your dog's best owner Great Dog Book at www.abrohamneal.com On Jul 7, 2007, at 9:35 PM, Dudley Hurry wrote: Neal, The ideal is to minimize the opposite side band.. You may have to decrease the signal to the second receiver, either dropping the power from the 1K into the dummy load or use attenuation on the second receiver. You really don't want 40 over on the second receiver, s-9 to 10 over on the same sideband, then null the opposite sideband.. You might be saturating your receiver, and just can't hear the null.. 73, Dudley WA5QPZ At 08:05 PM 7/7/2007, Neal Campbell K3NC wrote: I am definitely doing something wrong! I have been trying to do the xmit rejection calibration and not having much success. I click on the test tone transmit button, click Mox (while in USB), set xmit drive to max into a dummy load and listen on the same freq. on another rig. If I tune down abt 3 Khz I can hear a tone (past the main tone) but nothing I do with the phase and gain sliders has any effect on it. I tried the procedure in the knowledge base where you set both the rx and sdr1k to the same freq in USB, the switch to LSB on the monitoring rx. I have an Orion2 and when switching from USB to LSB, it does not change frequency (it stays zero beat to the signal). I am assuming that this is normally a neat way to shift down freq so you can hear any image. Again I can tune downwards but nothing I do with the sliders changes any secondary tones. What am I doing wrong?? Thanks Neal ___ 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] Xmit rejection procedure Help
Neal, The ideal is to minimize the opposite side band.. You may have to decrease the signal to the second receiver, either dropping the power from the 1K into the dummy load or use attenuation on the second receiver. You really don't want 40 over on the second receiver, s-9 to 10 over on the same sideband, then null the opposite sideband.. You might be saturating your receiver, and just can't hear the null.. 73, Dudley WA5QPZ At 08:05 PM 7/7/2007, Neal Campbell K3NC wrote: I am definitely doing something wrong! I have been trying to do the xmit rejection calibration and not having much success. I click on the test tone transmit button, click Mox (while in USB), set xmit drive to max into a dummy load and listen on the same freq. on another rig. If I tune down abt 3 Khz I can hear a tone (past the main tone) but nothing I do with the phase and gain sliders has any effect on it. I tried the procedure in the knowledge base where you set both the rx and sdr1k to the same freq in USB, the switch to LSB on the monitoring rx. I have an Orion2 and when switching from USB to LSB, it does not change frequency (it stays zero beat to the signal). I am assuming that this is normally a neat way to shift down freq so you can hear any image. Again I can tune downwards but nothing I do with the sliders changes any secondary tones. What am I doing wrong?? Thanks Neal ___ 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/ -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070707/303fd7c1/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/
Re: [Flexradio] Xmit rejection procedure Help
Thanks, I just tried it at 20 watts and same result. I had also inserted the 18db attenuation feature of the Orion2 and never saw a difference. Otherwise, the rig seems to behave normally. I was in the DL rtty contest and since I was using AFSK I wanted to make sure I was not blasting unwanted sidebands thru my Acom amp (hence why I just decided to do the calibration). Neal Campbell K3NC [EMAIL PROTECTED] telnet to our DX Spotting clusters at: dxc.k3nc.com, ports 12001 and 23 Devoted to Dogs: How to be your dog's best owner Great Dog Book at www.abrohamneal.com On Jul 7, 2007, at 9:35 PM, Dudley Hurry wrote: Neal, The ideal is to minimize the opposite side band.. You may have to decrease the signal to the second receiver, either dropping the power from the 1K into the dummy load or use attenuation on the second receiver. You really don't want 40 over on the second receiver, s-9 to 10 over on the same sideband, then null the opposite sideband.. You might be saturating your receiver, and just can't hear the null.. 73, Dudley WA5QPZ At 08:05 PM 7/7/2007, Neal Campbell K3NC wrote: I am definitely doing something wrong! I have been trying to do the xmit rejection calibration and not having much success. I click on the test tone transmit button, click Mox (while in USB), set xmit drive to max into a dummy load and listen on the same freq. on another rig. If I tune down abt 3 Khz I can hear a tone (past the main tone) but nothing I do with the phase and gain sliders has any effect on it. I tried the procedure in the knowledge base where you set both the rx and sdr1k to the same freq in USB, the switch to LSB on the monitoring rx. I have an Orion2 and when switching from USB to LSB, it does not change frequency (it stays zero beat to the signal). I am assuming that this is normally a neat way to shift down freq so you can hear any image. Again I can tune downwards but nothing I do with the sliders changes any secondary tones. What am I doing wrong?? Thanks Neal ___ 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] Xmit rejection procedure Help
In investigating further... I do not seem to be getting any tone out when I click the enable test tone box in the image reject dialog. No output wattage is ever shown. Is this normal? If not, any idea what could be the problem? I can start the two tone test from the test tab and it outputs fine. Neal Campbell K3NC [EMAIL PROTECTED] telnet to our DX Spotting clusters at: dxc.k3nc.com, ports 12001 and 23 Devoted to Dogs: How to be your dog's best owner Great Dog Book at www.abrohamneal.com On Jul 7, 2007, at 9:35 PM, Dudley Hurry wrote: Neal, The ideal is to minimize the opposite side band.. You may have to decrease the signal to the second receiver, either dropping the power from the 1K into the dummy load or use attenuation on the second receiver. You really don't want 40 over on the second receiver, s-9 to 10 over on the same sideband, then null the opposite sideband.. You might be saturating your receiver, and just can't hear the null.. 73, Dudley WA5QPZ At 08:05 PM 7/7/2007, Neal Campbell K3NC wrote: I am definitely doing something wrong! I have been trying to do the xmit rejection calibration and not having much success. I click on the test tone transmit button, click Mox (while in USB), set xmit drive to max into a dummy load and listen on the same freq. on another rig. If I tune down abt 3 Khz I can hear a tone (past the main tone) but nothing I do with the phase and gain sliders has any effect on it. I tried the procedure in the knowledge base where you set both the rx and sdr1k to the same freq in USB, the switch to LSB on the monitoring rx. I have an Orion2 and when switching from USB to LSB, it does not change frequency (it stays zero beat to the signal). I am assuming that this is normally a neat way to shift down freq so you can hear any image. Again I can tune downwards but nothing I do with the sliders changes any secondary tones. What am I doing wrong?? Thanks Neal ___ 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/
