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Types of Readout
A variety of readout configurations is available for ADCs that are
not inextricably connected to a dedicated memory. ADCs in a NIM
package usually offer TTL outputs on a specially defined bus. The
CAMAC modular package provides greater flexibility for readout to a
computer in larger experiments. It can also offer computer control
of the adjustable ADC parameters. For experiments requiring readout
of a large number of ADCs with coincident events, the CAMAC package
with list-mode readout on the FERAbus is a fast and efficient
solution, particularly when zero suppression is employed. The
FERAbus readout is able to skip ADCs presenting no information in 3
ns, find the ADCs with active information, and read them out at a
rate of 100 ns per word. For example, finding and reading out five
nonzero outputs in a 40-input array of ADCs takes about 1.1 µs. |
