If the clock uses batteries, check them and replace if necessary. I know that the signal can get though, because it has managed to set one time that Ive noticed (it turns on a signal if it was able to set the last time it tried). In this series, we call out current holidays and give you the chance to earn the monthly SpiceQuest badge! To continue this discussion, please ask a new question. In addition to longitude, latitude, and altitude, the Global Positioning System (GPS) provides a critical fourth dimension - time. The new achievement bythe U.S. research team, with members fromNIST, the University of Colorado-Boulder, and the University of Virginia in Charlottesville, could remove such limitations by combining the performance of. You can check your clock by using the NIST web clock, or by listening to NIST Radio Station WWV using a shortwave radio or telephone (dial 303-499-7111). If you are not sure if the signal is being received, try powering down the clock (unplug it or remove the batteries), then turn it on again to see if it can synchronize. The current signal readability rating can have one of four different values: Most products only attempt to synchronize at night when the readability conditions are generally Excellent or Very Good in most parts of the continental United States. So if you have pulses where you know the timing to within a femtosecond (one quadrillionth of a second), how do you convert those photons to electrons while maintaining that level of timing stability? And in fact, the most important thing, it says in the article that theres no DCF77 signal where Henner lives. Stratum 0 -These are high-precision timekeeping devices such as atomic (caesium or rubidium) clocks, GPS clocks or other radio clocks. Is there some simple way of strengthening the WWVB signal so my clocks will reset themselves automatically, preferably one that doesn't involve stringing wires to each device? [Henner Zeller] lives in a place where there is no reception of the DCF77 signal that his European wristwatch expects to receive. So, I bought the latest Raspberry Pi 3B+ from Argon40 as it is the only reseller available in the Philippines to be selling Made in UK RBPis. There is no external antenna, I presume theres an internal one. Are these units legal? I assume it keeps reasonable time, but after ten years theres only been a few days, never in a group, when it hasnt syncd up. Most digital radio controlled clocks have an indicator on the display that tells you if the signal is being received properly. If, like me, you live at the edge of. (To listen to the broadcasts by phone, dial +1-303-499-7111 for WWV and +1-808-335-4363 for WWVH.) On 3/15/2014 6:07 PM, Jeff Liebermann wrote: >> anneal it first. If there is a large amount of builiging materials between the clock and Boulder that would contribute to poor performance. Have you tried it in other locations, like home, or vacation site, etc? weathershack.com has a Shopper Approved rating of 4.8/5 based on 61728 ratings and reviews. This is actually even better then some cheap VCOs output.