There are 8 Kapton readout cables attached to the tracker. Each of cable connects 8 HDI's facing on one side of the tracker to a repeater board attached to the tracker. Signals from the tracker is buffered at a repeater board and sent to a TEM board. Signals from a TEM board is not buffered. Repeater boards are powered by DVDD, or a digital power for an HDI.
A 37-pin Nanonics connector is mounted on the DAQ side of a Kapton cable and connects it to a repeater board. A Kapton cable has 8 "legs", each of which connects an HDI with a 25-pin Nanonics connector mounted on the leg. Pin-assignment of both connectors are in Tables 6 and 7.
Table 6: Signals on 37-pin Connector on Kapton Flexible Cable
Table 7: Signals on 25-pin Connector on i-th leg of Kapton Flexible Cable