Cited as a reference · for some experience
#287 Remote Controller for Clocks (IKEA and others, DCF77, WWVB, MSF, JJY)
Why people recommend it
Andreas Spiess builds a low-power transmitter that sets radio-controlled clocks via DCF77, WWVB, MSF or JJY; cited when people ask about emulating a time signal.
In their words
Though not a solution, you may find the Man With A Swiss Accent’s (Andreas Spiess) recent video of some help
user115418 on raspberrypi.stackexchange.com, Apr 2020. CC BY-SA.
Besides the RTL-SDR dongle receiver, there is at least one excellent tutorial describing how to hack a receiver using a Raspberry Pi.
Seamus on raspberrypi.stackexchange.com, Oct 2020. CC BY-SA.
Also, an interesting project here for building a WWVB transmitter.
Seamus on electronics.stackexchange.com, Jan 2023. CC BY-SA.