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About Instrument Triggering
VX4101A MultiPaq Instrument User Manual
2–11
In addition to the above trigger sources, the Digital Multimeter (DMM), Digital
to Analog Converter (DAC), Digital Input, and Digital Output use the following
fixed source:
Table 2–3: VX4101A Fixed Trigger Sources for the DMM, DAC, Digital Input and
Digital Output
Trigger Source
HANDshake Derived from one of the front panel REQUEST signals. There is one
source for each instrument. When you select the handshake or trigger
source, the operation triggers on the leading edge of a programmable
polarity pulse of this signal. When the operation ends, the instrument
generates an acknowledge signal on the front panel ACKNOWLEDGE
STROBE signal associated with the generating instrument. You can
also program the polarity of the ACKNOWLEDGE STROBE pulse.
For information on handshake pin assignments, see Appendix
B:Input/Output Connections. See Appendix A: Specifications for
additional information.
VX4101A Trigger Architecture
Figure 1 shows the trigger architecture of the VX4101A. Note that not all trigger
modes and sources are common to all instruments. Most trigger sources can be
routed to any of the VXIbus TTL trigger lines or to an external trigger output on
the front panel. The two types of trigger sources are as follows:
H Fixed trigger sources are always in pass-through mode
H Delayable trigger source supports three trigger modes: pass-through, delay
by time, and delay by trigger
Additional
Instrument-Specific
Trigger Sources