AMSAT-DL and QARS asks the users of the new geostationary QO-100 satellite for radio discipline. During the last weeks some stations have been transmitting with much too much power and sometimes outside of the official band limits. Also permanent carriers are sent without indication of callsign. This was also critically observed in the control center of Es'hailSat in Qatar.
Please do not send louder than the CW beacon.
Stick to the band plan: No operation is allowed below the CW beacon and above the PSK beacon.
The satellite is not a measuring device: To test your power amplifier in continuous operation, please use a dummy load and a suitable measuring device.
Check regularly the bandwidth of your transmissions, maximum bandwidth 2.7 kHz, no FM.
Qatar has made a great gift to the amateur radio community with the Qatar OSCAR 100 satellite. We should act accordingly. Please kindly point this out to other stations on the transponder. If there are still violations, in the worst case a temporary shutdown could be expected.
Thanks for sharing Peter, I have myself seen such behavior when I monitor the downlink. This is a great gift to our fraternity and everyone of us who is using this capability should follow the guidelines, It will be sad to see a temporary shutdown. Many in our fraternity have devoted their time & resources to develop the ground segment due to which there are many options available for those who are technical to build on their own and for some to be able to buy off the shelf,they will be disappointed as well. 73 Nitin [VU3TYG]
On Saturday, 28 September, 2019, 04:44:36 am GMT+8, Peter Guelzow via AMSAT-BB amsat-bb@amsat.org wrote:
AMSAT-DL and QARS asks the users of the new geostationary QO-100 satellite for radio discipline. During the last weeks some stations have been transmitting with much too much power and sometimes outside of the official band limits. Also permanent carriers are sent without indication of callsign. This was also critically observed in the control center of Es'hailSat in Qatar.
Please do not send louder than the CW beacon.
Stick to the band plan: No operation is allowed below the CW beacon and above the PSK beacon.
The satellite is not a measuring device: To test your power amplifier in continuous operation, please use a dummy load and a suitable measuring device.
Check regularly the bandwidth of your transmissions, maximum bandwidth 2.7 kHz, no FM.
Qatar has made a great gift to the amateur radio community with the Qatar OSCAR 100 satellite. We should act accordingly. Please kindly point this out to other stations on the transponder. If there are still violations, in the worst case a temporary shutdown could be expected.
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Just want to say, have been out of the hobby for a bit, but have been watching youtube videos of QO-100, and I'm so impressed with what Qatar and the crew behind QO-100 have done. This shows what is possible. Congratulations on an amazing achievement! Give it the respect it is due.
On 9/27/2019 10:13 PM, Nitin Muttin via AMSAT-BB wrote:
Thanks for sharing Peter, I have myself seen such behavior when I monitor the downlink. This is a great gift to our fraternity and everyone of us who is using this capability should follow the guidelines, It will be sad to see a temporary shutdown. Many in our fraternity have devoted their time & resources to develop the ground segment due to which there are many options available for those who are technical to build on their own and for some to be able to buy off the shelf,they will be disappointed as well. 73 Nitin [VU3TYG]
On Saturday, 28 September, 2019, 04:44:36 am GMT+8, Peter Guelzow via AMSAT-BB <amsat-bb@amsat.org> wrote:AMSAT-DL and QARS asks the users of the new geostationary QO-100 satellite for radio discipline. During the last weeks some stations have been transmitting with much too much power and sometimes outside of the official band limits. Also permanent carriers are sent without indication of callsign. This was also critically observed in the control center of Es'hailSat in Qatar.
Please do not send louder than the CW beacon.
Stick to the band plan: No operation is allowed below the CW beacon and above the PSK beacon.
The satellite is not a measuring device: To test your power amplifier in continuous operation, please use a dummy load and a suitable measuring device.
Check regularly the bandwidth of your transmissions, maximum bandwidth 2.7 kHz, no FM.
Qatar has made a great gift to the amateur radio community with the Qatar OSCAR 100 satellite. We should act accordingly. Please kindly point this out to other stations on the transponder. If there are still violations, in the worst case a temporary shutdown could be expected.
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
participants (3)
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Cathryn Mataga -
Nitin Muttin -
Peter Guelzow