Prototypes have been built and used in the SYSTEM TESTS at CERN
since September 1998.
The suggested setup for electrically connected modules is shown in Fig.3 of this document.
For optically connected modules the suggested circuit is shown in Fig.2 of this document.
A brief description of these modules is given below.
As well as the master 40.08 MHz clock, available on the CLOCKOUT output, the CLOAC MASTER Module generates the ABC-specified command strings for the fast commands : "Level 1 Trigger", with its programmable delay, "Soft Reset" and "BC Reset" are broadcast to all the modules via the DATAOUT output.
Also supported is the Calibration Pulse sequence, which includes automatic "Cal. trigger" after a programmable delay. Other slow commands can also be issued, up to 64-bit length only, but note that these are broadcast to all DATAOUT outputs simultaneously.
Detailed information on the design and functionality of CLOAC MASTER and CLOAC FANOUT modules is available at this URL.
There are 12 input streams. Each stream is synchronized to the system clock and buffered in a FIFO.
The readout control circuit event-builds the stream data and outputs complete events to the host via a multipage dual-port memory. It also provides the capability of histogramming hit channels on the fly without incurring a time penalty. MuSTARD is an electrical module, ie its data inputs are electrical, differential LVDS.
Detailed information on the design and functionality of MuSTARD module is available at this URL.
Detailed information on the design and functionality of SLOG module is available at this URL.
The estimated cost of each module as a "one off" is:
MuSTARD £ 3.5k
SLOG £ 1.4k
New orders for CLOAC systems are no longer being taken
CLOAC Master £ 1.8k
CLOAC Fanout £ 0.3k
Please remember that the lead time for delivery of the individual electronics modules is governed by the delivery times of some electronics components, and will be a minimum of 10 weeks from the date of ordering.
For further information contact Andy Parker (parker@hep.phy.cam.ac.uk). Unfortunately no more CLOAC modules can be ordered due to discontinuation of parts.