Apollo Comms Part 39: Rebuilding the digital data demodulator @CuriousMarc
Apollo Comms Part 39: Rebuilding the digital data demodulator  @CuriousMarc
Uploaded March 2026 | Updated September 2026, 1 week ago
We rebuild the missing the data decoder and recreate a live Houston controller screen.

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

Mike's FPGA code: github.com/thewonderidiot/cm_pcm/tree/main/fpga

Links to schematics:
CSM 114 Systems Handbook: ibiblio.org/apollo/Documents/HSI-481260.pdf
CSM Functional Integrated Schematics Block II rev. K: ibiblio.org/apollo/Documents/CSM%20Functional%20Integrated%20System%20Schematics%20Block%20II%20Revision%20K.pdf

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

Elevator Music Credit: Crinoline Dreams by Kevin MacLeod

Stuff that supports the channel:
- Support us on Patreon: patreon.com/curiousmarc
- Amazon links for the tools I use in the lab: curiousmarc.com/amazon-links
- Channel merch on Fourthwall: curiousmarc-shop.fourthwall.com
- Legacy channel merch on Teespring (I don't have everything transferred to Fourthwall yet): teespring.com/stores/curiousmarcs-store

Our sponsors
- PCBWay: fast turn PCBs, pcbway.com
- ElectroRent: electrorent.com
- Keysight: test instruments: keysight.com
- Samtec: connectors: samtec.com
- R&D Microwaves: rdmicrowaves.com
Apollo Comms Part 39: Rebuilding the digital data demodulatorWe found the shark in the SHARC DSP #Short #InTheRightOrientationStanford Research Systems SR510 Lock-in AmplifierTV-2B/U Military Tube Tester Restoration - Part 2I knew my ITECH 7321 programmable AC source would be useful one dayHP 3438A Digital Multimeter Repair, Calibration and Principle of OperationSoyuz Globus Mechanical Navigation Computer Part 1: Grand OpeningIBM 9020 Core Memory Module from the FAA Air Traffic Control SystemMMD-1 Restoration - Part 1: bringing up the cutest Intel 8080 microcomputer trainerSoyuz Globus Mechanical Navigation Computer Part 3: Landing FunctionHP 6516A 3kV Supply vs. CRT TubeHP 197A oscilloscope camera Instax conversion
CuriousMarc |

Apollo Comms Part 39: Rebuilding the digital data demodulator

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