A new double-threshold discriminator has been designed and constructed at F
rascati INFN laboratories for processing the signals arising from gas-drift
chambers. Its main features are low time walk, high channel density and VM
E interface. The discriminator board is 9U sized and houses 32 channels mou
nted on independent sockets. This solution eases the replacement of faulty
channels without loosing operation of the full board. (C) 2001 Elsevier Sci
ence B.V. All rights reserved.