Contents©National Instruments CorporationviiPCI-6023E/6024E/6025E User ManualAIGATE Signal.................................................................................4-39SISOURCE Signal ............................................................................4-40Waveform Generation Timing Connections ...................................................4-40WFTRIG Signal ................................................................................4-40UPDATE* Signal..............................................................................4-41UISOURCE Signal ...........................................................................4-42General-Purpose Timing Signal Connections .................................................4-43GPCTR0_SOURCE Signal...............................................................4-43GPCTR0_GATE Signal....................................................................4-44GPCTR0_OUT Signal ......................................................................4-45GPCTR0_UP_DOWN Signal ...........................................................4-45GPCTR1_SOURCE Signal...............................................................4-46GPCTR1_GATE Signal....................................................................4-46GPCTR1_OUT Signal ......................................................................4-47GPCTR1_UP_DOWN Signal ...........................................................4-47FREQ_OUT Signal ...........................................................................4-49Field Wiring Considerations ..........................................................................................4-49Chapter 5CalibrationLoading Calibration Constants ......................................................................................5-1Self-Calibration..............................................................................................................5-2External Calibration .......................................................................................................5-2Other Considerations .....................................................................................................5-3Appendix ASpecificationsAppendix BCustom Cabling and Optional ConnectorsAppendix CCommon QuestionsAppendix DCustomer Communication