K5-xxx
The University of Liverpool, The University of Manchester
Ashley Greenall
18/02/03
K5-xxx Outer Module using 'New' Patch Card
-
Module mounted in Liverpool Cooling Box (see picture below).
-
Module mounted directly onto cooling block.
-
The Box is 'grounded' to the module via the cooling block - the jumpers
on the Patch Card are left out.
-
No common-mode chokes used.
-
Optical (Electro-optical Emulation) data route (Select = 0)
-
Nominal ABCD bias settings (FEShp = 30uA, FEBias = 220uA)
-
Nominal Vdet = 80V, Idet = 0.46uA
-
Thybrid = 38C
Opto-Emulation
The module is configured to be electrically 'remote' from the readout support
card, the interconnection from support card to the module is made via a
5m screened Ethernet cable (for the BPM encoded CLK0/COM0 and Link0/Link1
data streams). The input signals for the DORIC have been set so that they
are switching at 60uA (low-end), the DORIC is specified to expect input
signals whose switching range is 60uA - 600uA (for a Logic 1).
Note that it is necessary for ABCD S11 (Link1) to be bypassed due to
it returning Protocol Errors when being readout. This problem is not present
when using the Redundant data route. The CLK0/COM0 outputs from DORIC have
been probed and are present and correct, likewise the wirebonds to the
ASIC.
Results
-
Front-end Input noise, Link0 = 1467e, Link1
= 1508e;
-
Gain, Link0 = 54.03mV/fC, link1 = 53.97mV/fC;
-
Threshold variation (for TrimRange 0) , Link0 = 2.7mV,
Link1 = 2.08mV.
-
Noise Occupancy, Link0 = 1.13x 10-5 .Link1
= 1.09x 10-5.
Conclusions
-
Module has been demonstrated to operate successfully
using both the Optical and Redundant data routes.
-
There is little discernable difference with the module
performance whichever method of module readout is selected.