V6 User Manual 1.00.book - Studio General

MasterIn a multi-board system, this check box determines which board is the source of digital audio sync. Only one boardcan be selected as master.Audio SyncronizationMaster SyncIn an Multi-board system choose the board which will be the sync master from the drop-down list.SourceThis determines the sample clock source for the whole Pyramix system. If an external source is selected and novalid signal is detected, the system reverts to Internal until the external signal is restored. The following choicesare available:InternalSelects the board’s internal oscillator as clock master.VideoSelects an external video input as the reference. The card derives word clock from the video sync rate. A validvideo signal must be connected to the Mykerinos board chosen as the Video / TC master in the VS3 control panel.Word ClockSelects an external word clock source as the reference. The word clock must be connected to the Mykerinos boardchosen as video / TC master in the VS3 control panel. This option is grayed out if there is no valid source connected.Audio InputSelect this option if you want Pyramix to derive it’s clock from an external audio source connected to any of thedaughtercard(s) present. The correct audio input must also be selected.LTCIn special situations this option enables word clock to be derived from Linear TimeCodeWordClock is Output at XXk *2For sample rates above 48kHz WordClock is normally output at the standard fundamental rate. E.g. if 128KHz isselected then WordClock is output at 32kHz unless the box is ticked, in which case the WordClock output rate isdoubled to 64kHz.Video/TimeCode SynchronizationVideo FormatThe drop-down list presents all available Video FormatsTC ReferenceThe drop-down list presents all valid TimeCode reference sources.VarispeedAllows either choice of either a pull-up / pull-down sampling rate or running Pyramix in Varispeed mode byadapting the sampling rate.Important! Typical digital to analog or analog to digital converters (such as Merging Technologies Sphynxor DUAII do not operate beyond +/- 0.15 ‰ (150 ppm) and therefore will mute in any Varispeedmode. It is suggested to route the Mykerinos digital I/O’s through external real-time sampling rate conversioncircuitry or to use adequate external converters with built-in pull-up or pull-down support.Note: Note: Locking to external NTSC video reference is limited to nominal and pulldownsampling rates.Settings : Hardware 27 - 486