WWVB RADIO GENERATOR
WWVB RADIO SERIAL
WWVB RADIO PROFESSIONAL

Then, one buffer for 30.72 MHz (or configurable frequency, IIRC) and PPS each.ĭon't know if it'll need special communication via the serial port headers soldered on below to start (don't actually think so!), but these could be trivially supplied using just any $5 USB-to-TTL adapter out there.

WWVB RADIO GENERATOR

The Opendigitalradio project (a project to establish broadcasting systems for digital audio broadcasting), or rather Matthias HB9EGM himself, has built a GPSDO:Īside from the uBlox LEA-M8F GPS receiver, reference clock + PPS generator module, there's barely anything on that board – a chip to regulate the supply voltage, and one to protect against ESD if one decides to solder on the USB debugging plug. You can find a lot of these modules on the surplus/used market – Trimble GPS comes to mind, for example – but you can also build such things yourself:

WWVB RADIO PROFESSIONAL

Thus, in the professional world, WWVB and similar things are pretty much forgotten, since the signal simply is too narrowband to give you a good frequency and timing estimate within short time. GPS-discplined oscillators (GPSDOs) are really common in cellular base station technology, where you must very accurately coordinate frequency (and time), to be able to use the (billions of euros) licenses for the limited spectrum you've got most efficiently – avoid the guard band between you cell's 'own' band and the neighboring cell, as well as minimize frequency-error induced losses in transmission. Frequency standards in cellular infrastructure You'll find a lot of modules on the market that will not only give you a Pulse Per Second (PPS), but also a frequency standard signal, most commonly 10 MHz, but there's other frequencies, too. The UltrAtomic® clock reads this information and, at the appropriate instance, automatically advances the hands one hour in the spring and eleven hours in the fall (to move back one hour), even if the signal is not received on the day of the transition.GPS-based frequency answer rightly pointed at devices that use GPS to generate the 1-second pulsing.Ĭuriously, these modules only address the once-per-second accuracy issue, not the frequency standard issue, which GPS is indeed commonly used to solve: The new WWVB broadcast provided by the NIST includes a notification for the daylight savings time transitions well ahead of when they are to occur. Now you can enjoy UltrAtomic® accuracy, while view time zone around the world. UltrAtomic® clocks allow you to select any time zone with a custom setting. The reception reliability of the technology has been validated in the most challenging locations and scenarios, and has been demonstrated successfully throughout all of North America. It leverages the advanced modulation scheme and new data encoding.

UltrAtomic® technology digitally processes the received signal via an integrated circuit within the clock. UltrAtomic clocks operate even in the harshest conditions, where the signal-to-noise ratio interferes with radio-controlled clock reception using the legacy AM signal broadcast. This line of products is the first and only one in the market to be based on this enhanced broadcast, offering unparalleled reception.

La Crosse Technology is introducing a line of radio-controlled clocks based on its innovative UltrAtomic® technology, designed to receive the phase-modulated enhanced WWVB broadcast signal that NIST has recently introduced.

Wwvb radio