HP E1429A manual Routing the Signal to a Source, Enabling the Synchronization Signal

Routing the Signal to a Source

The arm 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 below 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 an input source, then that same port or line cannot be used to route (OUTPut) the signal.

Enabling the Synchronization Signal

In order for the arm synchronization signal to be routed to the "Ext 1" port or to an ECLTRG or TTLTRG trigger line, the routing must be enabled. This is done with the commands:

OUTPut:EXTernal[1][:STATe] <mode >

OUTPut:ECLTrg<n >[:STATe] <mode >

OUTPut:TTLTrg<n >[:STATe] <mode >

For each command, the <mode > settings are:

ON - enables the port or trigger line to route the signal.

OFF - disables the port or trigger line from routing the signal.

Multiple TTLTRG trigger lines are individually enabled or disabled by executing the OUTP:TTLT<n >:STAT command for each line.

Note The TTLTRG trigger lines are not independent with regard to the synchronization signal supplied by FEED. This means that all TTLTRG trigger lines enabled by OUTP:TTLT<n >:STAT will carry the same synchronization pulse.

120 Understanding the HP E1429 Digitizer Chapter 3