In coherent mode, the Tx clock is derived from the Rx signal instead of from the AUX oscillator

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   AkaSci 🛰️ (akasci@fosstodon.org)'s status on Thursday, 14-Mar-2024 20:17:16 JST AkaSci 🛰️

   in reply to

   Richard Stephenson of DSN Canberra explains on twitter how NASA verified that the uplink is working.

   They sent a command to Voyager 1 to switch between non-coherent mode and coherent mode transmission.

   In coherent mode, the Transmission clock is derived from the Rx signal instead of from the AUX oscillator. This changes the Tx RF frequency a bit which was detected at the DSN.

   https://science.nasa.gov/learn/basics-of-space-flight/chapter10-1/
   https://descanso.jpl.nasa.gov/DPSummary/Descanso4--Voyager_new.pdf
   #Voyager
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