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GEN7iB

139

DIGITAL TRIGGER MODES

10.4 Recorder and system trigger

The trigger modes and features described so far are channel-based. Each analog chan-

nel within a GEN series system has a digital trigger detector. The trigger signals of all

channels of a single recorder are combined through a logical OR to generate a com-

binedtrigger.Thistriggercanbecombinedwithanexternaltriggerandqualiers.The

nalresultisarecordertrigger.Thetriggersthataregeneratedbyindividualrecorders

can be distributed to other recorders and mainframes.

ThefollowingsimplieddiagramisfromthePerceptionsoftwareandshowsthe

building blocks that make the complete recorder trigger logic. Please note that not all

features may be available depending on the exact hardware used.

([W7ULJJHU2XW

([W7ULJJHU,Q

&KDQQHO

&DOFXODWHG&K

&DOFXODWHG&K1

&KDQQHO1

4XDOLILHU

4XDOLILHU1

&RPELQH

Fig. 10.6 Recorder trigger logic

The heart of the recorder trigger logic is the “Combine” block. All trigger sources come

together here. The trigger sources can generate a recorder trigger, depending on their

settings,However,thiscanbeblockedbyqualiers.Ifoneofthequaliersisnot

armed, no recorder trigger can be generated.

● Channel 1 through N: These are the channel triggers as described above. Please

refer to chapter „10.1 Introduction“ on page 132.

● External Trigger In: This is an external trigger signal that is mainframe-related:

The input connector is placed on the mainframe controller. Used to select rising or

falling edge, all input cards in the mainframe use the same edge. Each input card

can select to use the external trigger as a trigger source.

● Qualier1throughN:Thesearethequaliersasdescribedabove:Pleasereferto

chapter„10.3.3Triggerqualier“onpage138.

● External Trigger Out: The recorder trigger can be used to send a trigger signal to

the outside world. The output connector is placed on the mainframe controller.

Used to select active High or Low level output, all input cards in the mainframe use

the same output level. Each input card can select whether to send the trigger to

the external trigger output.

HBK GEN7iB GEN Series User Manual

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