CuriousMarc | Apollo Comms Part 7: NASA phase modulated receiver @CuriousMarc | Uploaded December 2021 | Updated October 2024, 4 days ago.
We try to bring up the original test equipment receiver for the phase modulated link. Does not go as planned, of course.

Apollo Comms Playlist: youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGb

Links to doc:
curiousmarc.com/space/apollo-s-band-communications
virtualagc.github.io/virtualagc/QuestForInfo.html
ibiblio.org/apollo

Our sponsors
- PCBWay: fast turn PCBs, pcbway.com
- Keysight: test instruments: keysight.com
- Samtec: connectors: samtec.com

Support the team on Patreon: patreon.com/curiousmarc
Buy shirts on Teespring: teespring.com/stores/curiousmarcs-store
Learn more on the companion site: curiousmarc.com
Contact info: youtube.com/curiousmarc/about

00:00 Recap of previous episodes
01:35 Apollo PM modulation scheme
02:43 Our Apollo PM receiver
05:07 Receiver first power up
05:57 Repairing the indicator lights
07:04 First unsuccessful microwave tests
09:13 Reverse engineering the receiver
11:21 Debugging the microwave front end
12:58 The receiver might have been modified
13:44 Or is it a LM or some other spacecraft receiver?
14:53 Finding the receive frequency
15:41 Successful lock, finally
18:32 Mike makes a discovery
19:19 Future challenges await us