Multi-AWG Sync Hub for Deterministic Clock Phase Alignment
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Solution Overview
Problem
Conventional methods for synchronizing multiple arbitrary waveform generators require external equipment and involve random phase relationships between clocks, leading to alignment challenges and timing skew, necessitating manual adjustment and potential restarts.
Innovation Solution
A synchronization hub with a master AWG, slave AWGs, a sync controller, and sync phase detector generates a divided clock signal that aligns phases across all AWGs, eliminating the need for external equipment and reducing latency and skew variation by using a derived clock signal for synchronized triggering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a common external clock and trigger signal are used to synchronize multiple AWGs, then the AWGs can be triggered simultaneously, but the startup phase relationship between clocks becomes random and requires manual alignment
Solution Approach 1:
A sync hub is introduced as an intermediary device between the external clock source and multiple AWGs. The sync hub receives the external clock signal, divides it down to generate SystemRefClock signals, and distributes these synchronized clock signals to all AWGs. This mediator ensures that all AWGs receive clocks with deterministic phase relationships, eliminating the random phase alignment problem while maintaining simultaneous triggering capability.
Solution Approach 2:
The sync hub performs preliminary clock division and phase alignment before distributing clocks to AWGs. By pre-processing the external clock signal to create properly phased SystemRefClock signals, the system eliminates the need for manual post-alignment of AWG outputs. The clock phase relationships are established in advance, ensuring deterministic synchronization from the start.
2Manufacturing precision
If manual phase adjustment is performed to align AWG outputs, then timing skew can be reduced, but trigger latency increases and multiple restarts may be needed
Solution Approach 1:
The sync hub acts as a mediator that deterministically controls clock phase relationships through its division circuitry. Instead of manual trial-and-adjustment, the sync hub pre-establishes proper phase relationships between clocks distributed to different AWGs. This eliminates iterative restarts and reduces synchronization time while maintaining precise output alignment.
Solution Approach 2:
The system incorporates a sync phase detector that monitors the phase relationships between clocks from the sync hub and provides feedback to the sync controller. This closed-loop feedback mechanism automatically adjusts clock distribution to maintain precise alignment, eliminating manual intervention and reducing synchronization time while ensuring accurate output alignment.
3Reliability
If external equipment is used for synchronization, then AWG synchronization can be achieved, but the system complexity and equipment requirements increase
Solution Approach 1:
The sync hub combines multiple functions into a single integrated device: clock division, clock distribution, and phase monitoring. By merging the clock source management and synchronization functions into one unit, the system reduces the number of separate external equipment pieces needed while maintaining reliable synchronization capability. The sync hub consolidates what would otherwise require multiple separate instruments.
Solution Approach 2:
The sync hub is designed as a universal synchronization device that can serve multiple AWGs simultaneously with a single unit. Rather than requiring separate synchronization equipment for each AWG pair, the multi-functional sync hub distributes synchronized clocks to any number of AWGs, reducing overall system complexity while maintaining full synchronization capability.
Data Source
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.