Hi : I sent a couple friends that are interested to the AMSAT website. I told them to look at all the satellites. They found the site had all satellites on it. When they brought up the sats they didn,t put on the sidebands on the linear birds, the up and downlinks . I mean the upper and lower sidebands for these birds. So I sent them to the UK site and they were there. They didn,t have Oscar 68 on there though. Jerry w0sat
Perhaps that's because it doesn't really matter which sideband you use on the linear sats although I believe it's customary to Tx USB.
On 29-Jun-10 23:39, Dads wrote:
Hi : I sent a couple friends that are interested to the AMSATwebsite. I told them to look at all the satellites. They found the site had all satellites on it. When they brought up the sats they didn,t put on the sidebands on the linear birds, the up and downlinks . I mean the upper and lower sidebands for these birds. So I sent them to the UK site and they were there. They didn,t have Oscar 68 on there though. Jerry w0sat
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No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.829 / Virus Database: 271.1.1/2967 - Release Date: 06/27/10 18:35:00
Dear Friends,
For linear transponders, it is customary to receive in USB. So, if the transponder is non-inverting, TX in USB. If it is inverting, TX in LSB.
73, Tony AA2TX AMSAT VP Engineering
---
At 07:53 PM 6/29/2010, Nigel Gunn G8IFF/W8IFF wrote:
Perhaps that's because it doesn't really matter which sideband you use on the linear sats although I believe it's customary to Tx USB.
On 29-Jun-10 23:39, Dads wrote:
Hi : I sent a couple friends that are interested to the AMSATwebsite. I told them to look at all the satellites. They found the site had all satellites on it. When they brought up the sats they didn,t put on the sidebands on the linear birds, the up
and downlinks
. I mean the upper and lower sidebands for these birds. So I sent them to the UK site and they were there. They didn,t have Oscar 68 on there though. Jerry w0sat
Sent via [email protected]. 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
No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.829 / Virus Database: 271.1.1/2967 - Release Date:
06/27/10 18:35:00
-- Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032 Amateur Radio G8IFF W8IFF (was KC8NHF), e-mail [email protected] www http://www.ngunn.net Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club International #385, Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC, GCARES, XWARN.
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Jerry,
Linear satellites today use LSB for the Uplink and USB for the downlink by general agreement.
Also by agreement:
CW is on the lower 1/3 of the downlink bandpass. Mixed Modes are in the center 1/3 of the downlink bandpass. SSB is in the top 1/3 of the downlink bandpass.
73, Adrian AA5UK
________________________________ From: Dads [email protected] To: [email protected] Sent: Tue, June 29, 2010 6:39:01 PM Subject: [amsat-bb] question
Hi : I sent a couple friends that are interested to the AMSAT website. I told them to look at all the satellites. They found the site had all satellites on it. When they brought up the sats they didn,t put on the sidebands on the linear birds, the up and downlinks . I mean the upper and lower sidebands for these birds. So I sent them to the UK site and they were there. They didn,t have Oscar 68 on there though. Jerry w0sat
_______________________________________________ Sent via [email protected]. 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
Adrian, I had a thread from December 2008 on this board that said the following:
VO-52 is LSB on the uhf uplink and USB on the vhf downlink FO-29 is LSB on the vhf uplink and USB on the UHF downlink. AO-7 is LSB on the uhf uplink and USB on the vhf downlink. Mode B AO-7 is USB on the vhf uplink and USB on the 10m downlink Mode A
Can you please comment?
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Adrian Engele Sent: Tuesday, June 29, 2010 8:28 PM To: Dads; [email protected] Subject: [amsat-bb] Re: question
Jerry,
Linear satellites today use LSB for the Uplink and USB for the downlink by general agreement.
Also by agreement:
CW is on the lower 1/3 of the downlink bandpass. Mixed Modes are in the center 1/3 of the downlink bandpass. SSB is in the top 1/3 of the downlink bandpass.
73, Adrian AA5UK
________________________________ From: Dads [email protected] To: [email protected] Sent: Tue, June 29, 2010 6:39:01 PM Subject: [amsat-bb] question
Hi : I sent a couple friends that are interested to the AMSAT website. I told them to look at all the satellites. They found the site had all satellites on it. When they brought up the sats they didn,t put on the sidebands on the linear birds, the up and downlinks . I mean the upper and lower sidebands for these birds. So I sent them to the UK site and they were there. They didn,t have Oscar 68 on there though. Jerry w0sat
_______________________________________________ Sent via [email protected]. 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 _______________________________________________ Sent via [email protected]. 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
Mark,
Both our responses are correct. I decided to leave AO-7 Mode A off from my initial response to Jerry as few people use that mode these days. This is a non inverting transponder, therefore USB-Up and USB-Down.
I was trying to address Jerry's request for helping our newcomers. Their concentration would most likely be on FO-29, HO-68, AO7 (mode B) and VO52. All four of these satellites are LSB Up and USB down as you indicated below.
A great web site where all this information is nicely detailed is at: http://www.dk3wn.info/satellites.shtml See each satellite page.
73, Adrian AA5UK
________________________________ From: Mark Lunday [email protected] To: Adrian Engele [email protected]; Dads [email protected]; [email protected] Sent: Wed, June 30, 2010 7:45:26 AM Subject: RE: [amsat-bb] Re: question
Adrian, I had a thread from December 2008 on this board that said the following:
VO-52 is LSB on the uhf uplink and USB on the vhf downlink FO-29 is LSB on the vhf uplink and USB on the UHF downlink. AO-7 is LSB on the uhf uplink and USB on the vhf downlink. Mode B AO-7 is USB on the vhf uplink and USB on the 10m downlink Mode A
Can you please comment?
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Adrian Engele Sent: Tuesday, June 29, 2010 8:28 PM To: Dads; [email protected] Subject: [amsat-bb] Re: question
Jerry,
Linear satellites today use LSB for the Uplink and USB for the downlink by general agreement.
Also by agreement:
CW is on the lower 1/3 of the downlink bandpass. Mixed Modes are in the center 1/3 of the downlink bandpass. SSB is in the top 1/3 of the downlink bandpass.
73, Adrian AA5UK
________________________________ From: Dads [email protected] To: [email protected] Sent: Tue, June 29, 2010 6:39:01 PM Subject: [amsat-bb] question
Hi : I sent a couple friends that are interested to the AMSAT website. I told them to look at all the satellites. They found the site had all satellites on it. When they brought up the sats they didn,t put on the sidebands on the linear birds, the up and downlinks . I mean the upper and lower sidebands for these birds. So I sent them to the UK site and they were there. They didn,t have Oscar 68 on there though. Jerry w0sat
_______________________________________________ Sent via [email protected]. 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 _______________________________________________ Sent via [email protected]. 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
Thanks, Adrian. I wanted to make sure that my notes were correct, as I am not very experienced and have made mistakes in using the wrong mode. Fortunately, a polite ham would gently correct me on the air, without making me feel too dumb J
And I appreciate your kind response as well, Adrian. Just one more reason why I enjoy this hobby and AMSAT. Thanks, 73
From: Adrian Engele [mailto:[email protected]] Sent: Wednesday, June 30, 2010 9:00 AM To: Mark Lunday; Dads; [email protected] Subject: Re: [amsat-bb] Re: question
Mark,
Both our responses are correct. I decided to leave AO-7 Mode A off from my initial response to Jerry as few people use that mode these days. This is a non inverting transponder, therefore USB-Up and USB-Down.
I was trying to address Jerry's request for helping our newcomers. Their concentration would most likely be on FO-29, HO-68, AO7 (mode B) and VO52. All four of these satellites are LSB Up and USB down as you indicated below.
A great web site where all this information is nicely detailed is at: http://www.dk3wn.info/satellites.shtml See each satellite page.
73, Adrian AA5UK
_____
From: Mark Lunday [email protected] To: Adrian Engele [email protected]; Dads [email protected]; [email protected] Sent: Wed, June 30, 2010 7:45:26 AM Subject: RE: [amsat-bb] Re: question
Adrian, I had a thread from December 2008 on this board that said the following:
VO-52 is LSB on the uhf uplink and USB on the vhf downlink FO-29 is LSB on the vhf uplink and USB on the UHF downlink. AO-7 is LSB on the uhf uplink and USB on the vhf downlink. Mode B AO-7 is USB on the vhf uplink and USB on the 10m downlink Mode A
Can you please comment?
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Adrian Engele Sent: Tuesday, June 29, 2010 8:28 PM To: Dads; [email protected] Subject: [amsat-bb] Re: question
Jerry,
Linear satellites today use LSB for the Uplink and USB for the downlink by general agreement.
Also by agreement:
CW is on the lower 1/3 of the downlink bandpass. Mixed Modes are in the center 1/3 of the downlink bandpass. SSB is in the top 1/3 of the downlink bandpass.
73, Adrian AA5UK
________________________________ From: Dads [email protected] To: [email protected] Sent: Tue, June 29, 2010 6:39:01 PM Subject: [amsat-bb] question
Hi : I sent a couple friends that are interested to the AMSAT website. I told them to look at all the satellites. They found the site had all satellites on it. When they brought up the sats they didn,t put on the sidebands on the linear birds, the up and downlinks . I mean the upper and lower sidebands for these birds. So I sent them to the UK site and they were there. They didn,t have Oscar 68 on there though. Jerry w0sat
_______________________________________________ Sent via [email protected]. 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 _______________________________________________ Sent via [email protected]. 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
participants (5)
-
Adrian Engele -
Anthony Monteiro -
Dads -
Mark Lunday -
Nigel Gunn G8IFF/W8IFF