Electronic – the application of the SMA connectors on the DE2 115 FPGA board


The SMA connectors are expected to be used for clock IO. However, the board already has oscillator and the PLLs can be used to generate a variety of clock frequencies. Besides, for any daughter board connected to the extender socket or the HSMC interface, the clock signal can be sent via the connector itself. Why then would someone need to use these SMA connectors?

Best Answer

It's a development board, so it is designed to be flexible. Maybe you need a clock that can't be generated from an onboard oscillator with a PLL. Or you need a very low phase noise clock. Or perhaps a variable clock from an RF signal generator or ARB. Or perhaps you need multiple boards to run from the same clock source.