The ATLAS level-1 calorimeter trigger will utilise a number of advanced tec
hnologies, many of which have already been successfully demonstrated. To ev
aluate the different technologies associated with the important areas of hi
gh-speed data transport a large demonstrator system has been designed and o
perated during the last two years, using signals from prototype calorimeter
s in the ATLAS test-beam.
Using this system, inter-crate data transmission and reception have been de
monstrated at over 1.4 Gbyte/s, with individual links running at up to 1.6
Gbaud, Operating with 160 Mbit/s signals across a transmission-line backpla
ne, custom transceiver ASICs have achieved inter-module data fanout at peak
rates above 800 Mbyte/s. With the addition of Further modules, the system
was extended to emulate a vertical slice through the ATLAS level-1 calorime
We present here the results from these tests, including measurements of bit
-error rates across different data paths.