How do you achieve precise synchronization across multiple channels in a distributed data acquisition system?

Multi-channel synchronization strategies: common sampling clock (distribute master clock to all channels, account for propagation delays), simultaneous sample-and-hold (front-end S/H triggered by common signal before sequential ADC conversion), direct inter-board triggering (dedicated sync lines with controlled impedance), GPS or IEEE 1588 PTP for geographically distributed systems (sub-microsecond accuracy), and hardware timestamp for post-acquisition alignment. Address: clock jitter (phase noise specification), deterministic latency in communication, and calibration of channel-to-channel timing. For power quality and protection applications, phase accuracy requirements drive synchronization precision. Document achievable timing uncertainty and verify with cross-correlation analysis.