646Y feAturesClock (CLK) LEDThe Clock (CLK) LED will light yellow when the 6416Y2 card is set to bethe Pro64 network’s Control Master, which automatically sets the cardto be the network Clock Master. When the 6416Y2 card functions as thenetwork Clock Master, its clock is derived from the Yamaha host device.Only one Clock Master is possible in a Pro64 network. The Clock LEDwill remain unlit when the 6416Y2 card is a slave device to another clocksource (either the Pro64 network internal clock or from an externalWord Clock reference connected to a Pro64 digital I/O module such asthe 6416dio).Error (ERR) LEDThe Error LED will light red to indicate errors in enumeration,configuration, or clocking.A-Net LEDWhenever a valid A-Net connection is detected, the blue A-Net LED willlight solid. The A-Net LED will flash during the network enumerationprocess as Pro64 devices are added to the network, or during a firmwareupdate. If no valid Pro64 A-Net signal is detected, the A-Net LED remainsoff.