From tigwiki

The Swan charge sensitive preamplifiers are used for a variety of TIGRESS auxiliary silicon charged particle detectors, such as Bambino and the TIP silicon PIN diode array and S3 detector. There are a total of 10 preamp modules assembled into two five-module towers. The towers are mounted downstream of TIGRESS on an electrically isolated platform just below the lead shielding of the beam dump. Each tower contains three preamplifiers with 16-pin input and output ports (8 signal-ground pairs) and two preamplifiers with 34-pin input and output ports (16 signal-ground pairs). On both the input and output ports, the signal is on the bottom row of pins while the top row is for the ground.

Input of a Swan preamplifier. Sticker denotes first channel.

For the TIP silicon PIN diode array, three of the four 34-pin input and output preamps are used to accommodate the 44 individual silicon PIN diodes. The Swan preamp input and output signal mapping was investigated with this setup and therefore the information below has not been verified for the 16-pin input and output preamps. This mapping information is important for determining the correspondence between the input detector signal and preamplifier output channel.

The preamplifier output signal cables are standard keyed 34-pin connectors and therefore cannot be incorrectly plugged in. The opposite end of the cables are 16 coaxial wires with SMA connectors for input into the TIG10 card. The table below gives the mapping between input detector channel (with Channel 1 input to the leftmost preamp input pins as indicated by the figure) with the SMA cable in the TIGRESS electronic shack. For example, a detector signal input into Channel 1 of the preamp will be delivered to the electronics shack on output SMA cable Channel 16.

CAUTION: Note that if the standard Swan preamp output cables are not used, a one-channel offset must be accounted for to preserve the above mapping. The output pin pair DIRECTLY OPPOSITE of the input pins for Channel 1 are not used. Rather, the output corresponding to input Channel 1 (output Channel 16 via the table above) is found one pin pair to the right. The trend continues across the 34-pin connector; the second to last input pin pair (input Channel 16) corresponds to the rightmost output pin pair (output Channel 1).