** THIS IS A SOLE SOURCE REQUIREMENT ** for Multi-Purpose ASIC Control and Interface Electronics (MACIE), consisting of: - MACIE PCB P/N 1500700-4 - Power Cable. Firmware Upgrade for enhanced sync features, including inputs for external master clock and sync trigger, and output for acknowledge signal. (apply to macie_acadia2x_LVDS_10_26_21_v2.1 firmware)