"A faint signal" sample

I want to know the name of a beautiful song that is somewhat famous but very few people know its origin. I've known for a long time that the song "A Faint Signal" by Infinity Frequencies is a sample.

It comes from this old transmission shutdown from Japan's old TV

Here's the video: https://youtu.be/2T9Ipf1Qq1o?si=MHUr3BXYG1W0plLZ

It starts at 1:45

Of course I have two ways to listen to it in different forms, but one is a repetitive sample and the other is a small fragment; I would like to be able to listen to the original and complete song. I would be very grateful if someone manages to find it and lets me know...

Thanks!