I want to output a signal through the SMA connector available on the Spartan 3E starter kit board. Can someone guide me as to how to do it?
There is only one Spartan 3E Starter Kit Board. The PDF is below. http://www.xilinx.com/support/documentation/boards_and_kits/ug230.pdf
From the PDF:
"The SMA connector allows an external clock source to drive one of the FPGA’s global clock inputs. Alternatively, the FPGA can provide a high-performance clock to another board via the SMA connector. See Chapter 3, “Clock Sources,” for additional information."
Figure 3-2: UCF Location Constraints for Clock Sources
The UCF file is how you set a signal to a pin. Is this the info you're missing?