OUTPut:TTLTrg<n >:FEED <source >

<source > = "READy"

The level on the selected TTLTRG trigger line goes low while the trigger system is initiated. The line goes high after the readings complete, and then goes low again for the next burst of readings.

When taking post-arm readings only, the signal returns high when the arm count and trigger count are both satisfied.

Routing the Signal to a Source

The trigger signal can be routed to the locations described above, provided the port or trigger line is not also used as an input for a reference clock source, arm source, or trigger source. Summarized are the external sources available to the digitizer:

External reference clock sources: "Ext 2" BNC port, ECLTrg<n > trigger line

External arm sources: "Ext 1" BNC port, ECLTrg<n > trigger line, TTLTrg<n > trigger line

External trigger sources: "Ext 1" BNC port, "Ext 2" port, ECLTrg<n > trigger line, TTLTrg<n > trigger line

If one of these ports or trigger lines is a source, then that same port or line cannot be used to route (OUTPut) the signal.

128 Understanding the HP E1429 Digitizer

Chapter 3

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HP E1429A manual Routing the Signal to a Source