jim...@earthlink.net said: > When designing the system to do coherent two way ranging to the Juno > spacecraft orbiting Jupiter, we found that the rotating magnetic field > (because the spacecraft spins at 2RPM in Jupiter's magnetic field) was > enough to modulate the circuits that track the received signal and generate > the transmitted signal ( basically a PLL)...
How strong is the magnetic field near Jupiter? I assume big, but maybe the orbiters don't get that close. How did you test it? I'd guess a big chamber with big Helmholtz coils. --------- I just took a fridge magnet to my box of (somewhat?) good oscillators. The 2 big ones had steel cases. The smaller Vectron had a steel base but non-magnetic top. ---------- jim...@earthlink.net said: > A bigger concern might be if you're locking something you care about to > that oscillator. The PLL might be more sensitive (particularly things like > the op amp circuitry driving the VCO... there's probably some sort of > physical loop in the wiring between the inverting and noninverting inputs > of the op amp. Does that mean we should put that stuff into a steel box? (With junk like power supplies outside.) -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.