  The upgrade of ATLAS Liquid Argon Calorimeter (LAr) Phase-1 trigger requires
high-speed, low-latency data transmission to read out the Lar Trigger Digitizer
Board (LTDB). A dual-channel transmitter ASIC LOCx2 have been designed and
produced. In order to ensure all the LOCx2 chips behave properly, a Quality
Assurance needs to be conducted before assembly. The problem I was trying to
solve in this project is to yield a clock signal with continuously adjustable
frequency and phase offset to generate and control an eye diagram for the QA.
By configuring the registers of an any-frequency generator IC, Si5338, the
clock signal whose frequency range from 5MHz to 200 MHz have been properly
produced. For the purpose of further development, a C-language based DLL which
packs up the function of adjusting frequency and setting phase offset was
designed and built, and several evaluation was performed to ensure the
robustness of DLL.

Signal Processing;Hardware Architecture