Gth Transceiver Clock Connections; Gth Tx/Rx Loopback Connections - Xilinx IBERT ML628 Getting Started Manual

Running the GTH IBERT Demonstration

GTH Transceiver Clock Connections

Refer to
reference clock (CLK0). Connect these cables to the SuperClock-2 Module as follows:
•
•
Note:
the GTH reference clock. CLKOUT1_P and CLKOUT1_N are used here as an example.

GTH TX/RX Loopback Connections

Refer to
receivers (RX0, RX1, RX2 and RX3) and the four transmitters (TX0, TX1, TX2 and TX3). Use
eight SMA female-to-female (F-F) adapters
cables as shown in
•
•
•
•
•
•
•
•
X-Ref Target - Figure 1-5
X-Ref Target - Figure 1-6
10
Figure 1-2, page 8 to identify the P and N coax cables that are connected to the
CLK0_P coax cable → SMA connector J5 (CLKOUT1_P on the SuperClock-2 Module)
CLK0_N coax cable → SMA connector J6 (CLKOUT1_N on the SuperClock-2 Module)
Any one of the five differential outputs from the SuperClock-2 Module can be used to source
Figure 1-2, page 8 to identify the P and N coax cables that are connected to the four
Figure 1-6
TX0_P → SMA F-F Adapter → RX0_P
TX0_N → SMA F-F Adapter → RX0_N
TX1_P → SMA F-F Adapter → RX1_P
TX1_N → SMA F-F Adapter → RX1_N
TX2_P → SMA F-F Adapter → RX2_P
TX2_N → SMA F-F Adapter → RX2_N
TX3_P → SMA F-F Adapter → RX3_P
TX3_N → SMA F-F Adapter → RX3_N
Figure 1-5: SMA F-F Adapter
Figure 1-6: TX-To-RX Loopback Connection Example
www.xilinx.com
(Figure 1-5) to connect the transmit and receive
and as detailed below:
UG806_c1_05_022411
TX Coax
SMA F-F Adapter
RX Coax
UG806_c1_06_022811
ML628 IBERT Getting Started Guide
UG806 (v1.0) May 20, 2011