Term	Description
AC	Alternate Current
ATCA	Advanced Telecommunications Computing Architecture
CPU	Central Processing Unit
EPICS	Experimental Physics and Industrial Control System
FPGA	Field Programmable Gate Array
IOC	Input Output Controller
LCLS	Linac Coherent Light Source
MDL	Main Drive Line
MO	Master Oscillator
NC	Normal-Conducting
RF	Radio Frequency
SC	Super-Conducting
SHM	Shelf Manager
VMTG	VME-based Master Trigger Generator

Objective

The main objective is to be able to use subsystems built for the LCLS-I reference frequencies with the LCLS-II beam.

Timing System Description

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