Im so frustrated that i cant find any resource about this

NIST radio station WWVB is located on the same site as WWV near Fort Collins, Colorado. The WWVB broadcasts are used by millions of people throughout North America to synchronize consumer electronic products like wall clocks, clock radios, and wristwatches. In addition, WWVB is used for high level applications such as network time synchronization and frequency calibrations.

http://www.nist.gov/pml/div688/grp40/wwvb.cfm

WWVB continuously broadcasts time and frequency signals at 60 kHz. The carrier frequency provides a stable frequency reference traceable to the national standard. There are no voice announcements on the station, but a time code is synchronized with the 60 kHz carrier and is broadcast continuously at a rate of 1 bit per second using pulse width modulation. The carrier power is reduced and restored to produce the time code bits. The carrier power is reduced by 17 dB at the start of each second, so that the leading edge of every negative going pulse is on time. Full power is restored 0.2 s later for a binary “0”, 0.5 s later for a binary “1”, or 0.8 s later to convey a position marker. The binary coded decimal (BCD) format is used so that binary digits are combined to represent decimal numbers.

The time code contains the year, day of year, hour, minute, second, and flags that indicate the status of Daylight Saving Time, leap years, and leap seconds. For more details, view the WWVB time code format.

WWVB identifies itself by advancing its carrier phase 45° at 10 minutes after the hour and returning to normal phase at 15 minutes after the hour. If you plot WWVB phase, this results in a phase step of approximately 2.08 microseconds.

WWVB Radio Controlled Clocks: Recommended Practices for Manufacturers and Consumers
A 64-page booklet containing recommended practices for WWVB radio controlled clock manufacturers, plus tips for consumers attempting to troubleshoot reception problems.

NIST Time and Frequency Services (NIST Special Publication 432)
A detailed 80 page overview of NIST time and frequency services and how to use them. Chapter 2 is all about WWVB.

How Accurate is a Radio Controlled Clock?
A discussion of WWVB radio controlled clock accuracy from the Horological Journal, March 2010.

Frequently Asked Questions
Answers to frequently asked questions about the NIST Radio Stations

Manufacturers of Time and Frequency Receivers
Links to manufacturers of WWVB and other time and frequency receivers