Omega 1002 manual Symbol Name Minimum Maximum

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The A/D trigger logic can initiate an A/D conversion upon an external trigger. Valid external trigger signals must be TTL compatible and meet minimum pulse width requirements. The requirements are shown below:

External trigger

tdu tre

Symbol	Name	Minimum	Maximum

Tdu	Duration time	40ns	∞
Tre	Recover time	100ns	∞

Note: The OME-PCI-1002 is designed only for time sensitive triggers (trigger is dependent only on the time of the falling edge of signal). For a level sensitive external trigger (trigger is dependent on the level of the input signal), the user can build the following external circuit the OME-PCI-1002:

Input Signal

OME-PCI- DAC 1002 D/O

Comparator

External

Trigger

TTL buffer

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Contents User’sGuide Servicing North America Table of Contents Software and Demo Program Diagnostic Program General Description IntroductionX86 System Block DiagramFeatures Power Consumption SpecificationsAnalog Inputs 4 A/D Trigger Methods 3 D/I and D/OInterrupt Channel Programmable Timer/CounterOME-PCI-1002 series multifunction cards ApplicationsRelease Notes Product Check ListBoard Layout Hardware ConfigurationA/D Calibration Jumper SettingOME-PCI-1002 System Function Block System Block DiagramOME-DB-8225 OME-DB-37 Daughter BoardsOME-DB-16P Isolated Input Board OME-DB-16R Relay Board Analog Input Signal Connection Page Page Signal Shielding Jumper Settings Connectors Page O Registers How to Find the I/O AddressPage I/O Address Map Section 8254 Registers Status Register Clear Interrupt Interrupt Source Selection General Control RegisterTrigger Method Selection Digital I/O Function OperationA/D trigger 8254 TimerSymbol Name Minimum Maximum CPU A/D ConversionSuggested Settling Times 1 A/D Conversion Trigger Modes Software Trigger and Polling Techniques Page Page Software and Demo Program Driver Plug & Play Test Power-ON Plug & Play TestA/D Test D I/O TestWARRANTY/DISCLAIMER Temperature