KCU105 Board User Guide www.xilinx.com 36
UG917 (v1.4) September 25, 2015
Chapter 1: KCU105 Evaluation Board Features
GTH TX and RX SMA Differential Pairs
[Figure 1-2, callout 12]
The KCU105 board includes two pairs (TX and RX) of SMA connectors wired to GTH Quad
bank 226. These differential SMA pairs have signal names SMA_MGT_TX_P, SMA_MGT_TX_N
and SMA_MGT_RX_P, SMA_MGT_RX_N (RX are capacitively coupled) and are connected to
FPGA U1 GTH bank 226 pins R4, R3 and P2, P1, respectively.
• External user-provided GTH TX and RX on SMA connectors
• Differential SMA pairs
The GTH TX and RX SMA transmit and receive signal data paths are routed with a differential
characteristic impedance of 100Ω (±10%) with an insertion loss of <4 dB up to 8 GHz.
Figure 1-15 shows the TX SMA pair and the AC-coupled RX SMA pair.
X-Ref Target - Figure 1-15
Figure 1-15: User GTH TX and RX SMA Pairs
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