We build a Phase Locked Loop (PLL) FM demodulator for extracting the Apollo downvoice from its subcarrier, using the classic 7046B IC. But in the meantime, as luck would have it, NASA's own S-band receiver's PLL seems to have gone bonkers, and we can't lock to the spacecraft microwave downlink anymore! So we'll get very hands on with PLLs in this episode. Expect a healthy dose of PLL elevator music.
Apollo Comms Playlist: • Apollo Comms Part 1: O...
Older video on Fractional-N PLLs, used for frequency synthesis: • HP 3325A Bonus Materia...
Links to doc:
www.curiousmarc.com/space/apo...
virtualagc.github.io/virtuala...
www.ibiblio.org/apollo/
www.ibiblio.org/apollo/Docume...
Elevator Music Credit: Crinoline Dreams by Kevin MacLeod
Our sponsors
- PCBWay: fast turn PCBs, www.pcbway.com
- ElectroRent: www.electrorent.com
- Keysight: test instruments: www.keysight.com
- Samtec: connectors: www.samtec.com
- R&D Microwaves: www.rdmicrowaves.com/
Support the team on Patreon: / curiousmarc
Buy shirts on Teespring: teespring.com/stores/curiousm...
Learn more on the companion site: www.curiousmarc.com
Contact info: kzitem.infoa...
Негізгі бет Ғылым және технология Apollo Comms Part 30: Double PLL Trouble!
Пікірлер: 143