MicroTCA Carrier Clock Card Segmentation
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Solution Overview
Problem
The conventional MicroTCA clock system faces challenges in implementing high-precision clocks due to physical space limitations on the MCH, leading to increased system costs and inefficiencies, especially in multi-frame cascading configurations where some units remain idle.
Innovation Solution
A MicroTCA carrier architecture that separates clock functions into a dedicated clock card and MCH, allowing for the selection and generation of a system synchronization clock, which is then driven to AMCs, thereby simplifying clock implementation and reducing system costs by eliminating the need for redundant clock generation in slave frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If clock functions are implemented on the MCH in conventional MicroTCA, then the system can provide clock synchronization, but the physical space limitations on the MCH prevent implementation of high-precision clocks and increase system costs
Solution Approach 1:
The clock function is segmented from the MCH and implemented as a separate AMC card. The MCH retains only clock distribution functions while the AMC card implements clock generation and synchronization. This segmentation allows high-precision clock components to be placed on the AMC card without occupying MCH space, resolving the contradiction between clock precision and MCH physical space limitations.
2Reliability
If clock module is integrated on MCH, then clock function can be provided, but redundant clock generation units are required in slave frames increasing system costs
Solution Approach 1:
The clock generation function is extracted from the MCH and concentrated in a dedicated AMC card. In multi-frame cascading configurations, only the master frame requires the clock generation unit on the AMC card, while slave frames receive synchronized clocks through the MCH. This extraction eliminates redundant clock generation units in slave frames, reducing device complexity and system costs while maintaining reliable clock synchronization across all frames.
3Measurement precision
If MCH implements clock functions within standard height limits, then the system meets form factor requirements, but high-precision clock implementation becomes difficult
Solution Approach 1:
The clock generation function is moved from the MCH to a separate AMC card, utilizing the vertical dimension of the carrier architecture. The AMC card can be positioned in available slots above or below the MCH, providing the necessary physical space for high-precision clock components without increasing the MCH height beyond the 6-HP standard limit. This dimensional relocation resolves the contradiction between clock precision requirements and MCH height constraints.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables the implementation of higher stratum clocks without physical size constraints and reduces system costs by utilizing a standalone clock card for clock generation, improving clock precision and reducing idle unit issues in cascaded configurations.
Implementation Method 1
a phase-lock unit, configured to generate a system synchronization clock according to the first clock source selected by the first clock selecting unit
Data Source
AI summary
A MicroTCA system is disclosed that includes an MCH, a clock card connected with the MCH, and multiple AMCs. The clock card includes a clock selecting unit, configured to select and output a clock source and a phase-lock unit, configured to generate a system synchronization clock according to the clock source selected by the clock selecting unit of the clock card. The MCH includes a clock drive unit, configured to drive the system synchronization clock generated by the clock card to multiple AMCs connected with the MCH. A clock card, a cascaded MicroTCA carrier, and a method for providing a clock are also provided. In this way, the implementation of the MicroTCA clock system is simplified, and the whole configuration cost of multiple cascaded MicroTCA carriers is reduced.