This evening I shut the 435.150 transmitter off and raised 435.300 to near 2 watts output. Tomorrow morning I plan to turn on the new PL routine. This improved routine will turn the downlink on with an unsquelched uplink when it hears a 67 hz tone. I plan on leaving a tail of several minutes, so the transmitter will stay on without hearing a tone for an interval of several minutes.
What does this mean for the user? It would be helpful to program in a 67 hz PL tone again, but not absolutely required as long as someone else in the footprint does. It also means if you are the first person in the footprint (not very likely in North America, Europe, or Japan) you might not hear the satellite until after it hears 67hz for a few seconds.
If all goes well, we'll continue this mode through the mode change Sunday night. Reports from when the downlink turns on or off would be appreciated.
73, Drew KO4MA AMSAT-NA VP Operations
Well, the PL mode is still off. We'll try again this afternoon.
73, Drew KO4MA
Andrew Glasbrenner wrote:
This evening I shut the 435.150 transmitter off and raised 435.300 to near 2 watts output. Tomorrow morning I plan to turn on the new PL routine. This improved routine will turn the downlink on with an unsquelched uplink when it hears a 67 hz tone. I plan on leaving a tail of several minutes, so the transmitter will stay on without hearing a tone for an interval of several minutes.
What does this mean for the user? It would be helpful to program in a 67 hz PL tone again, but not absolutely required as long as someone else in the footprint does. It also means if you are the first person in the footprint (not very likely in North America, Europe, or Japan) you might not hear the satellite until after it hears 67hz for a few seconds.
If all goes well, we'll continue this mode through the mode change Sunday night. Reports from when the downlink turns on or off would be appreciated.
73, Drew KO4MA AMSAT-NA VP Operations _______________________________________________ Sent via AMSAT-BB@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
PL is on as of about 2215Z. Before LOS I heard it drop twice for a second or two until it heard a valid tone again. This will happen about every 120 seconds. Reports are welcome, especially from remote users/areas.
73, Drew KO4MA
Andrew Glasbrenner wrote:
Well, the PL mode is still off. We'll try again this afternoon.
73, Drew KO4MA
Andrew Glasbrenner wrote:
This evening I shut the 435.150 transmitter off and raised 435.300 to near 2 watts output. Tomorrow morning I plan to turn on the new PL routine. This improved routine will turn the downlink on with an unsquelched uplink when it hears a 67 hz tone. I plan on leaving a tail of several minutes, so the transmitter will stay on without hearing a tone for an interval of several minutes.
What does this mean for the user? It would be helpful to program in a 67 hz PL tone again, but not absolutely required as long as someone else in the footprint does. It also means if you are the first person in the footprint (not very likely in North America, Europe, or Japan) you might not hear the satellite until after it hears 67hz for a few seconds.
If all goes well, we'll continue this mode through the mode change Sunday night. Reports from when the downlink turns on or off would be appreciated.
73, Drew KO4MA AMSAT-NA VP Operations _______________________________________________ Sent via AMSAT-BB@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
Sent via AMSAT-BB@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
Hi Drew, I listened to a pass with AOS here at 0649 UTC. AO-51 turned the TX off as it shall - but it was soon put on by someone. I did not time it.
A question: If people use a 67 Hz tone before the TX turns off will that start a new 120 sec. periode ?
Have a nice Sunday all. 73 OZ1MY Ib ----- Original Message ----- From: Andrew Glasbrenner To: Amsat-BB ; AO51 Modes Sent: Sunday, April 11, 2010 12:27 AM Subject: [ao51-modes] Re: [amsat-bb] Re: AO-51 power up, PL test tomorrow
PL is on as of about 2215Z. Before LOS I heard it drop twice for a second or two until it heard a valid tone again. This will happen about every 120 seconds. Reports are welcome, especially from remote users/areas.
73, Drew KO4MA
Hello Ib,
Thank you for the report.
The transmitter shuts off (for about a second, maybe less) after 2 minutes, even if people are talking with a 67Hz tone. So, a new 120 sec period will not start until the current one ends.
The bird was loud this morning! Lots of activity for an early (6:15 am local) pass.
73,
Mark N8MH
At 09:35 AM 4/11/2010 +0200, OZ1MY wrote:
Hi Drew, I listened to a pass with AOS here at 0649 UTC. AO-51 turned the TX off as it shall - but it was soon put on by someone. I did not time it.
A question: If people use a 67 Hz tone before the TX turns off will that start a new 120 sec. periode ?
Have a nice Sunday all. 73 OZ1MY Ib ----- Original Message ----- From: mailto:glasbrenner@mindspring.comAndrew Glasbrenner To: mailto:amsat-bb@amsat.orgAmsat-BB ; mailto:ao51-modes@amsat.orgAO51 Modes Sent: Sunday, April 11, 2010 12:27 AM Subject: [ao51-modes] Re: [amsat-bb] Re: AO-51 power up, PL test tomorrow
PL is on as of about 2215Z. Before LOS I heard it drop twice for a second or two until it heard a valid tone again. This will happen about every 120 seconds. Reports are welcome, especially from remote users/areas.
73, Drew KO4MA
Via the AO51-modes mailing list courtesy of AMSAT-NA AO51-modes@amsat.org http://amsat.org/mailman/listinfo/ao51-modes
Mark L. Hammond [N8MH]
Hi Drew,
AO-51 was off at AOS but turned on OK with short burst of tone at 0748UT. No problems from then on although there was one short drop-out even when I had tone on. Worked VKs OK. Two stations with tone and two without. One drop-out easily fixed for a non tone station with a short tone burst. Still going OK with the VK's at LOS here at around 0754UT.
73 Alan ZL2BX
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Andrew Glasbrenner Sent: Saturday, 10 April 2010 22:28 To: Amsat-BB; AO51 Modes Subject: [amsat-bb] Re: AO-51 power up, PL test tomorrow
PL is on as of about 2215Z. Before LOS I heard it drop twice for a second or two until it heard a valid tone again. This will happen about every 120 seconds. Reports are welcome, especially from remote users/areas.
73, Drew KO4MA
participants (4)
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Alan Cresswell -
Andrew Glasbrenner -
Mark L. Hammond -
OZ1MY