Multi-AWG Clock Synchronization With Phase-Aligned Triggering
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Solution Overview
Problem
Conventional methods for synchronizing multiple arbitrary waveform generators (AWGs) are inefficient, requiring external equipment and resulting in random phase relationships between clocks, leading to alignment challenges and timing skew, which complicates the setup and operation of multi-AWG systems.
Innovation Solution
A synchronization system comprising a master AWG, slave AWGs, a sync hub with a sync controller and sync phase detector, which generates a divided down clock and derives a clock signal to align phases and trigger waveform playback, eliminating the need for external equipment and reducing latency and skew variation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a common external clock and trigger source is used to synchronize multiple AWGs, then the AWGs can be triggered simultaneously, but the startup phase relationship between clocks becomes random and requires external equipment
Solution Approach 1:
The patent combines the clock distribution and synchronization functions into a single integrated system. The master AWG's clock is directly distributed to slave AWGs through the sync hub, eliminating the need for separate external clock and trigger sources. This merging of functions reduces device complexity while maintaining synchronization reliability.
Solution Approach 2:
The sync hub acts as an intermediary device that receives the clock from the master AWG and distributes it to slave AWGs. This intermediary component enables centralized clock management and phase alignment without requiring external equipment, resolving the contradiction between synchronization reliability and system complexity.
2Ease of operation
If the internal divided clocks are used to start waveforms, then wider setup and hold window trigger timing is achieved, but random phase alignment occurs between AWGs requiring manual adjustment
Solution Approach 1:
The sync phase detector provides feedback by monitoring the phase relationship between master and slave AWG clocks. This feedback mechanism automatically detects phase misalignment and enables the sync controller to adjust slave clock phases, maintaining precise alignment without manual intervention while preserving the wide trigger timing window benefits of divided clocks.
Solution Approach 2:
The sync hub serves as an intermediary that inserts phase detection and correction functionality between the master and slave AWGs. This intermediary component automatically manages phase alignment, eliminating the need for manual adjustment while maintaining the operational advantages of internal divided clocks.
3Manufacturing precision
If manual phase adjustment is performed to align AWG outputs, then timing skew can be reduced, but the process requires random trial and error and may fail if initial alignment is too far off
Solution Approach 1:
The system performs preliminary phase alignment automatically through the sync phase detector and controller before waveform generation begins. This preliminary action ensures that clocks are pre-synchronized to the required precision, eliminating the need for time-consuming manual trial and error adjustments and preventing failure cases where initial misalignment exceeds adjustment range.
Solution Approach 2:
The synchronization system is self-service in that it automatically detects and corrects phase misalignment between AWGs without requiring manual intervention. The sync phase detector and controller work autonomously to maintain precise timing alignment, eliminating both the time loss and potential failure modes associated with manual adjustment processes.
4Device complexity
If external equipment is used for synchronization, then clock distribution is simplified, but trigger latency and skew variation increase
Solution Approach 1:
The patent merges clock distribution and trigger synchronization into a single integrated pathway. The same clock signal that drives waveform generation is directly distributed to slave AWGs through the sync hub, eliminating separate external clock equipment and reducing trigger latency. This merging maintains timing precision while simplifying the overall system architecture.
Data Source
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AI summary
A system and method synchronizes multi-AWG system, where such systems are of a type having a master arbitrary waveform generator (AWG), one or more slave AWGs, and a sync hub having a sync controller and sync phase detector. The method operates by receiving at the sync hub a divided down clock (SystemRefClock) signal from a master arbitrary waveform generator (AWG). The method then derives a clock signal (SystemClock) from the SystemRefClock signal received from the master AWG and outputs the SystemClock signal to the master AWG and to the one or more slave AWGs Finally, the SystemClock signal is used to clock a synchronous trigger for the master AWG and one or more slave AWGs to play a waveform. In one aspect, the synchronous trigger includes AlignmentFiducial and Run signals to effect trigger and play commands.