Method and apparatus for realizing clock redundancy back-up in WCDMA system base station
A clock technology in the base station, which is applied in the direction of selecting devices, electrical components, radio/inductive link selection and arrangement, etc., can solve the problems of complex implementation, large delay, and difficulty in ensuring the phase consistency of the working clock signal, and achieve precise phase control The rate of change, frequency and phase consistency are good, and the effect of facilitating fault analysis and maintenance
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[0035] The implementation of the present invention will be described in detail below with reference to the accompanying drawings.
[0036] figure 2 It is the clock redundancy backup device in the base station of the present invention. The device is composed of two clock boards and service boards that back up each other. The clock board includes a frequency adjustment circuit for generating A standard frequency 10MHz signal; phase adjustment circuit, used for standard frequency 10MHz signal to generate a 2.048MHz signal and send it to the opposite board; clock output circuit: multiply the 30.72MHz working clock required by the system, and distribute it through the backplane drive circuit To each business board. In the two clock boards that are mutually active and backup, the backup clock board is under the control of the master / backup selection module of the phase adjustment circuit, selects the clock output from the master clock board as the phase reference, and generates one ch...
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