Model SCG6500 LVPECL synchronous clock generator module is said to be tha only such module to offer completely digital PLL control. The module provides one fixed, 622.08-MHz output and five user-selectable LVPECL outputs.With jitter of 0.2 ps at 622.08 MHz, the module is suitable for use up to OC-192 operation. Other features include 3.3V operation, seven selectable output frequencies, 20 ppm free-run and hold-lost modes, input references with hitless switchover, and alarm outputs for LORA, LORB and LOL. CONNOR-WINFIELD CORP., Aurora, IL. (630) 851-4722.