AUPC ( Automatic Uplink Power Control )

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Acharya Member ★★ Offline Posts: 12 Banglore	Jun 10^th, 2013 at 11:50pm Dear Mr Eric, Can i have some technical notes about AUPC. Regards, RA
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Eric Johnston Senior Member ★★★ Offline Posts: 2109	Reply #1 - Jun 11^th, 2013 at 6:12pm I've written some explanation here: https://www.satsig.net/link-budgets/uplink-power-control.htm If anyone has more to add, please do so. Best regards, Eric.
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Reply #2 - Jun 11^th, 2013 at 6:23pm

This info is dated, but the system I used back in the 80s used Alfa Flunk at the RX terminal to control the uplink power at the TX station. Alfa Flunk is measured at the 70 MHz level, and acts as a pseudo BER. A non-satellite feedback circuit from the RX terminal to the TX terminal carried the uplink power commands. Most of the time the feedback circuit was full duplex, which permitted each terminal to automatically control the others uplink. To be clear, this adjusted power of each individual up converter - not the terminal composite signal

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Acharya Member ★★ Offline Posts: 12 Banglore	Reply #3 - Jun 26^th, 2013 at 2:01am Dear Mr Eric, Thanks for the AUPC note.
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