Re: SO-67 over Europe thanks for test
Hi Kostas, If you do not have FMN on your radio, turn the mike gain down and/or do not shout :-) 73 OZ1MY Ib ----- Original Message ----- From: "Kostas Ioannidis" [email protected] To: "OZ1MY" [email protected] Sent: Saturday, November 07, 2009 12:20 PM Subject: Re: [amsat-bb] SO-67 over Europe thanks for test
Goodmorning, As the previous operator said thank you a lot for this great sounding sat! It was booming all tha pass. A lot of traffic on the air! But the narrow FM is an issue for those who do not use it...
73 de SW1IXP
How "narrow" is FMN?
Roger WA1KAT
----- Original Message ----- From: "OZ1MY" [email protected] To: "Kostas Ioannidis" [email protected]; "AMSAT-BB" [email protected] Sent: Saturday, November 07, 2009 6:40 AM Subject: [amsat-bb] Re: SO-67 over Europe thanks for test
Hi Kostas, If you do not have FMN on your radio, turn the mike gain down and/or do not shout :-) 73 OZ1MY Ib ----- Original Message ----- From: "Kostas Ioannidis" [email protected] To: "OZ1MY" [email protected] Sent: Saturday, November 07, 2009 12:20 PM Subject: Re: [amsat-bb] SO-67 over Europe thanks for test
Goodmorning, As the previous operator said thank you a lot for this great sounding sat! It was booming all tha pass. A lot of traffic on the air! But the narrow FM is an issue for those who do not use it...
73 de SW1IXP
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
Hi Roger and the -bb,
From memory it takes up less than 12.5 kHz which is the
channel spacing on 2 meters (In Region 1 at least). Frequency deviation like 2.5 kHz (old 3.5 kHz and even some have 5 kHz deviation). It is the frequency deviation that is a the issue with SO-67 (I think). If you run too high deviation on the uplink the LF to the transmitter will make it deviate too much. Even for a normal (old) setting on the receive side.
The Carson rule says: Signal Bandwidth = 2 times (Deviation + modulation frequency).
Did that help ? 73 OZ1MY Ib ----- Original Message ----- From: "Roger Kolakowski" [email protected] To: "OZ1MY" [email protected]; "Kostas Ioannidis" [email protected]; "AMSAT-BB" [email protected] Sent: Saturday, November 07, 2009 3:03 PM Subject: Re: [amsat-bb] Re: SO-67 over Europe thanks for test
How "narrow" is FMN?
Roger WA1KAT
----- Original Message ----- From: "OZ1MY" [email protected] To: "Kostas Ioannidis" [email protected]; "AMSAT-BB" [email protected] Sent: Saturday, November 07, 2009 6:40 AM Subject: [amsat-bb] Re: SO-67 over Europe thanks for test
Hi Kostas, If you do not have FMN on your radio, turn the mike gain down and/or do not shout :-) 73 OZ1MY Ib ----- Original Message ----- From: "Kostas Ioannidis" [email protected] To: "OZ1MY" [email protected] Sent: Saturday, November 07, 2009 12:20 PM Subject: Re: [amsat-bb] SO-67 over Europe thanks for test
Goodmorning, As the previous operator said thank you a lot for this great sounding sat! It was booming all tha pass. A lot of traffic on the air! But the narrow FM is an issue for those who do not use it...
73 de SW1IXP
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
Yes it did help...2.5 KHz it is...
Roger WA1KAT
----- Original Message ----- From: "OZ1MY" [email protected] To: "Roger Kolakowski" [email protected]; "Kostas Ioannidis" [email protected]; "AMSAT-BB" [email protected] Sent: Saturday, November 07, 2009 8:29 AM Subject: Re: [amsat-bb] Re: SO-67 over Europe thanks for test
Hi Roger and the -bb, From memory it takes up less than 12.5 kHz which is the channel spacing on 2 meters (In Region 1 at least). Frequency deviation like 2.5 kHz (old 3.5 kHz and even some have 5 kHz deviation). It is the frequency deviation that is a the issue with SO-67 (I think). If you run too high deviation on the uplink the LF to the transmitter will make it deviate too much. Even for a normal (old) setting on the receive side.
The Carson rule says: Signal Bandwidth = 2 times (Deviation + modulation frequency).
Did that help ? 73 OZ1MY Ib ----- Original Message ----- From: "Roger Kolakowski" [email protected] To: "OZ1MY" [email protected]; "Kostas Ioannidis" [email protected]; "AMSAT-BB" [email protected] Sent: Saturday, November 07, 2009 3:03 PM Subject: Re: [amsat-bb] Re: SO-67 over Europe thanks for test
How "narrow" is FMN?
Roger WA1KAT
----- Original Message ----- From: "OZ1MY" [email protected] To: "Kostas Ioannidis" [email protected]; "AMSAT-BB" [email protected] Sent: Saturday, November 07, 2009 6:40 AM Subject: [amsat-bb] Re: SO-67 over Europe thanks for test
Hi Kostas, If you do not have FMN on your radio, turn the mike gain down and/or do not shout :-) 73 OZ1MY Ib ----- Original Message ----- From: "Kostas Ioannidis" [email protected] To: "OZ1MY" [email protected] Sent: Saturday, November 07, 2009 12:20 PM Subject: Re: [amsat-bb] SO-67 over Europe thanks for test
Goodmorning, As the previous operator said thank you a lot for this great
sounding
sat! It was booming all tha pass. A lot of traffic on the air! But the narrow FM is an issue for those who do not use it...
73 de SW1IXP
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
For the 1614Z pass, I made it a point to stay centered in the uplink, i.e. a few kHz of appropriate Doppler correction on 2M as SO-67 went by. This helped also. Andy W5ACM
----- Original Message ----- From: "Roger Kolakowski" [email protected] To: "OZ1MY" [email protected]; "Kostas Ioannidis" [email protected]; "AMSAT-BB" [email protected] Sent: Saturday, November 07, 2009 3:38 PM Subject: [amsat-bb] Re: SO-67 over Europe thanks for test
Yes it did help...2.5 KHz it is...
Roger WA1KAT
----- Original Message ----- From: "OZ1MY" [email protected] To: "Roger Kolakowski" [email protected]; "Kostas Ioannidis" [email protected]; "AMSAT-BB" [email protected] Sent: Saturday, November 07, 2009 8:29 AM Subject: Re: [amsat-bb] Re: SO-67 over Europe thanks for test
Hi Roger and the -bb, From memory it takes up less than 12.5 kHz which is the channel spacing on 2 meters (In Region 1 at least). Frequency deviation like 2.5 kHz (old 3.5 kHz and even some have 5 kHz deviation). It is the frequency deviation that is a the issue with SO-67 (I think). If you run too high deviation on the uplink the LF to the transmitter will make it deviate too much. Even for a normal (old) setting on the receive side.
The Carson rule says: Signal Bandwidth = 2 times (Deviation + modulation frequency).
Did that help ? 73 OZ1MY Ib ----- Original Message ----- From: "Roger Kolakowski" [email protected] To: "OZ1MY" [email protected]; "Kostas Ioannidis" [email protected]; "AMSAT-BB" [email protected] Sent: Saturday, November 07, 2009 3:03 PM Subject: Re: [amsat-bb] Re: SO-67 over Europe thanks for test
How "narrow" is FMN?
Roger WA1KAT
----- Original Message ----- From: "OZ1MY" [email protected] To: "Kostas Ioannidis" [email protected]; "AMSAT-BB" [email protected] Sent: Saturday, November 07, 2009 6:40 AM Subject: [amsat-bb] Re: SO-67 over Europe thanks for test
Hi Kostas, If you do not have FMN on your radio, turn the mike gain down and/or do not shout :-) 73 OZ1MY Ib ----- Original Message ----- From: "Kostas Ioannidis" [email protected] To: "OZ1MY" [email protected] Sent: Saturday, November 07, 2009 12:20 PM Subject: Re: [amsat-bb] SO-67 over Europe thanks for test
Goodmorning, As the previous operator said thank you a lot for this great
sounding
sat! It was booming all tha pass. A lot of traffic on the air! But the narrow FM is an issue for those who do not use it...
73 de SW1IXP
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 (3)
-
Andy MacAllister -
OZ1MY -
Roger Kolakowski