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Notes about MVD hardware address (year-4)
Versions of this document for earlier runs are different.
The year-1 version of this document is different,
Look here to the year-1 version.
Look here to the year-2 version.
Look here to the year-3 version.
The format of MCM data packets is given here. The format of DCIM data packets is given here. From the DCIM, the packets go the the DCM, which adds further framing information as described here. The event builder home page also describes the frame format -- which appears to contain additional stuff wrapped around the DCM packet.
The information needed to associate a particular MCM/Si-detector with the packets is not conveniently organized. This information is as follows:
From the combination of these pieces of information and careful cabling, the DCIM output packet can be used to determine which MCM is came from.
In year-4, only the pad detectors are installed. The packets numbers used for the pad detectors in year-3 are used, so they range from 2097 to 2120.
Look here or here to see the first version of the "pcf" file which is used by the DCMs to relate the DCM slot and input number to the packet number.
Look at this pdf file or this powerpoint file for sketches of the locations of the packets and notes about current performance. South endcap pads addressing:
| z | phi | packet ID | DCIM addr. | DCIM out# | MUX bit | DCM slot, input# | DCM cable | notes
| 0
| 5
| 2097
| 17
| 4
| 1
| 9,2
| 50
| SE pad4, SN33
| 0
| 4
| 2098
| 17
| 5
| 0
| 9,1
| 49
| SE pad5, SN33
| 0
| 3
| 2099
| 17
| 5
| 1
| 9,1
| 49
| SE pad6, SN33
| 0
| 2
| 2100
| 18
| 5
| 1
| 9,4
| 52
| SW pad6, SN25
| 0
| 1
| 2101
| 18
| 5
| 0
| 9,4
| 52
| SW pad5, SN25
| 0
| 0
| 2102
| 18
| 4
| 1
| 10,1
| 53
| SW pad4, SN25
| 0
| 11
| 2103
| 18
| 4
| 0
| 10,1
| 53
| SW pad3, SN25
| 0
| 10
| 2104
| 18
| 1
| 1
| 10,2
| 54
| SW pad2, SN25
| 0
| 9
| 2105
| 18
| 1
| 0
| 10,2
| 54
| SW pad1, SN25
| 0
| 8
| 2106
| 17
| 1
| 0
| 9,3
| 63
| SE pad1, SN33
| 0
| 7
| 2107
| 17
| 1
| 1
| 9,3
| 63
| SE pad2, SN33
| 0
| 6
| 2108
| 17
| 4
| 0
| 9,2
| 50
| SE pad3, SN33
| |
North endcap pads addressing:
| z | phi | packet ID | DCIM addr. | DCIM out# | MUX bit | DCM slot, input# | DCM cable | notes
| 1
| 5
| 2109
| 19
| 4
| 1
| 19,4
| 56
| NE pad4, SN19
| 1
| 4
| 2110
| 19
| 5
| 0
| 19,3
| 55
| NE pad5, SN19
| 1
| 3
| 2111
| 19
| 5
| 1
| 19,3
| 55
| NE pad6, SN19
| 1
| 2
| 2112
| 20
| 5
| 1
| 20,2
| 58
| NW pad6, SN21
| 1
| 1
| 2113
| 20
| 5
| 0
| 20,2
| 58
| NW pad5, SN21
| 1
| 0
| 2114
| 20
| 4
| 1
| 20,3
| 59
| NW pad4, SN21
| 1
| 11
| 2115
| 20
| 4
| 0
| 20,3
| 59
| NW pad3, SN21
| 1
| 10
| 2116
| 20
| 1
| 1
| 20,4
| 60
| NW pad2, SN21
| 1
| 9
| 2117
| 20
| 1
| 0
| 20,4
| 60
| NW pad1, SN21
| 1
| 8
| 2118
| 19
| 1
| 0
| 20,1
| 57
| NE pad1, SN19
| 1
| 7
| 2119
| 19
| 1
| 1
| 20,1
| 57
| NE pad2, SN19
| 1
| 6
| 2120
| 19
| 4
| 0
| 19,4
| 56
| NE pad3, SN19
| |
In the tables above, the DCM cable number is the number
on the fiber-optic cable which goes from
a) the DCIM output to the patch panel on the west side
on the central magnet
b) the patch panel in Bldg 1008 to the DCM
The cable numbers are the same in the two places.
The DCM slots start with number 1 -- slot 1 contains the crate controller.
Some totals:
12 optical cables (aka "DCM" cables) are used (Numbers 36,51 and probably a few other are bad)
48 optical cables were used in the previous run for the strip detectors, they are
still there (numbers 1-48 with a few bad cables replaced with higher numbers) but not used.
9 extra optical ("DCM") cables (numbers go up to 69, 61 used to replace cable 36, 63 used to replace 51)
4 DCM modules are used (two with 2 unused inputs)
4 DCIM modules are used
24 packets ID's