Acronyms

These acronyms are focused on the timing system, but may contain other acronyms of the accelerator complex as well.

Unclear Acronyms

acronyms to be clarified are marked bold.

• GMT, General Machine Timing system (GMT is also known as Greenwich Mean Time)
• FEC, Forward Error Correction or Front-End Controller
• CS, the accelerator Control System (do we have a name for this?)

A

• ACCNET: ACCelerator NETwork, technical accelerator network
• ACU: Adaptive Control Unit, modular FPGA based control unit, special type of [TimingSystemAcronyms#F][FEC]]
• ATL: API Timing Library

B

• BEP, Bit Error Probability, term used within FEC
• BER, Bit Error Ratio, term used within FEC
• BMC, Best Master Clock, term used by PTP
• BuTiS, Bunchphase-Time Synchronization System, distributed highly precise clock

C

• C1/2, Corrected sine signal 1 and 2, term used by BuTiS
• CS, Control System

D

• DDS, Direct Digital Synthesizer, frequency synthesizer, used for re-synthesis of BuTiS T0 clock

E

• ECA, Event-Condition-Action Unit, a TR component which translates incoming events to actions
• EPU, Event Processing Unit, digests event sequences from LSA, and converts them into an event stream

F

• FEC, Front End Controller
• FECo, Forward Error Correction
• FEP, Frame Error Protection, term used by FEC
• FESA, Front-End Software Architecture, device model framework and driver package

G

• GigE, Gigabit Ethernet.
• GMT, General Machine Timing system. Based on WR.
• GPS, Global Positioning System

H

I

J

K

L

• LSA, LHC Software Architecture, settings management framework. It uses the TM
• LS1/LP0, Local reference signals S1/P0, term used by BuTiS

M

• MCS, Master Cycle Sequencer, coordinates beams and cycles throughout the accelerators

N

O

P

• P0, Pulse signal 0 (100kHz), term used by BuTiS
• PTP, Precision Timing Protocol, high precision time protocol for synchronization within RTE

Q

R

• RTE, Real-Time Ethernet

S

• S1/2, Sine signal 1 (10MHz) and 2 (200MHz), term used by BuTiS
• SCA, Scalable Control Unit, standard controller at FAIR
• SDB, Self Describing Bus
• SyncE, Synchronous Ethernet

T

• T0, Time 0, corrected clock identifier (originally P0, term used by BuTiS
• TAI, International Atomic Time
• TM, Timing Master, used by LSA to creates sequence programs for EPU
• TR, Timing Receiver

U

• UTC, Coordinated Universal Time

V

W

• WR, White Rabbit
• WB, Wishbone

X

Y

Z

-- DietrichBeck - 01 Mar 2011