An internal timing bus provides all timing and synchronization required by the A/D converters. It includes clock, sync, and gate or trigger signals. An on−board clock generator receives an external sample clock from a front panel SSMC connector. This clock can be used directly by the A/D or divided by a built−in clock synthesizer circuit. Alternatively, the sample clock can be sourced from an on−board programmable voltage−controlled crystal oscillator. In this mode, the front panel SSMC connector can be used to provide a 10−MHz reference clock for synchronizing the internal oscillator.
A front panel 26−pin LVPECL Clock/Sync connector allows multiple boards to be synchronized. In the slave mode, it accepts inputs that drive the clock, sync and gate signals. In the master mode, it can drive the timing signals for synchronizing multiple boards. Multiple boards can be driven from the bus master, supporting synchronous sampling and sync functions across all connected boards.