National Institute of Standards and Technology, Boulder Laboratories (NIST Boulder)
Radio Station WWVB
test_servicetime & frequency dissemination / measurementIndustry: Aerospace
- Category
- Capabilities & Access
- Affiliations
- NIST Boulder
Description
NIST 60 kHz LF time-code station near Fort Collins, Colorado, broadcasting continuous PWM and (since 2012) BPSK phase-modulated time codes used by millions of radio-controlled clocks in North America; two top-loaded monopole antennas on four 122 m towers.
Official page
https://www.nist.gov/pml/time-and-frequency-division/time-distribution/radio-station-wwvb
Open official page (opens in a new tab)Contact
- General contact
- NIST Radio <nist.radio@boulder.nist.gov>; nist.radio@boulder.nist.gov
Details
- Keywords
- 60 khz carrier, radio-controlled clocks, phase modulation time code, pulse width modulation, top-loaded monopole
- Location
- Fort Collins, Colorado
- Location
- place named in page text: Fort Collins
- Test standard
- Traceable to the NIST national standard
- Associated entity
- NIST
- Specifications
- In the first of the two formats, based on PWM, which has been in use for several decades, the carrier power is reduced by 17 dB at the start of each second and restored to full power 0.2 s later for… | This time code, also operating at a rate of 1 bi…