DCF77. Germany standard of time and frequency

DCF77. Germany standard of time and frequency

Mixed mode, AM and special PSK +/- 13 degrees. Br~646 Hz

Here is the record of this signal. Send by cryptomaster.

Author: SergUA6

Band Width ~1100 Hz

Low Range ~950 Hz, shift is possible, recieving is in SSB

Baud Rate ~646 Hz

n-Ary (PSK/MPSK) Special mode +/- 13 degrees

Count of Carriers 1

Carrier frequency ~1493 Hz in this record. In reality exact value is 77500 Hz

RX mode SSB

Sonograms:

pic.1 General view

pic.2 Spectrum's detalization

pic.3 Manipulation speed

Diagrams:

pic.4 View after AM detector

pic.5 View on Phase plane

DCF77 - The frequency and time standard allocated in Germany. Appearance of this record in our base, and its actually complete analysis is the result of brilliant operation of members of our forum. Many people know about this signal, but not many know about its structure and even less learned it in details. The signal possesses interesting enough parametres: phase manipulation with angles + / - 13 degrees. Data format is well enough described and accessible in the Internet. Exact frequency of radiation is 77500 Hertz.