Sep 25 – 29, 2006
Valencia, Spain
Europe/Zurich timezone

Testing, time alignment, calibration and monitoring features in the LHCb front-end electronics

Sep 26, 2006, 11:20 AM
Valencia, Spain

Valencia, Spain

IFIC – Instituto de Fisica Corpuscular Edificio Institutos de Investgación Apartado de Correos 22085 E-46071 València SPAIN


Jorgen Christiansen (CERN)


An overview of testing, time alignment, calibration and monitoring features in the front-end electronics of LHCb is given. General features for this are defined and examples are given of how this has been implemented in sub-detector specific front- end electronics.


A sufficient level of well defined timing alignment, monitoring and built-in testing
features in the LHCb front-end electronics system will be vital during the
commissioning and running phase of the experiment to assure a reliably working large
scale system. A set of general features have been defined to allow effective
testing to be performed by local sub-systems and also allow these to be used for
global system tests:
A: Common definition and timing of calibration pulse injection in detector channels
B: Acceptance of up to 16 consecutive triggers to ease general timing alignment and
verify detector pulse shapes and related spill-over.
C: Standardized optical link test used for link qualification, link installation
testing and system tests.
D: Standardized readout types to allow calibration pulse injection and other event
types to be handled during physics taking.
E: Standardized testing and monitoring features in the interface from sub-detector
specific front-end electronics to the general DAQ system.
F: Standardized protocol to perform extensive tests of DAQ links (gigabit Ethernet)
and DAQ event building readout network.

The standardized schemes will be presented and examples of how these are integrated
within sub-detectors are given.

Primary author

Presentation materials