User`s guide

53220A/53230A User’s Guide 145
Triggering and Gating 5
Trigger and Gate Time Line
Triggering and gating are part of every counter measurement. The relationship
of these actions relative to the measurement are shown in the time line of Fig-
ure 5-1.
Figure 5-1. Triggering and Gating Time Line.
Trigger and Gate Cycle
The elements of triggering and gating summarized in Figure 5-1 are shown in
detail in the programming cycle of Figure 5-2. The following sections contain
descriptions and examples of each step in the cycle.
Input events received are ignored Gate enabled
Auto Gate
Extension
INIT:IMMediate
Trigger
Trigger Delay
(Time)
Gate
Start
Start Gate Delay
(Time, Events)
Gate
Stop
Final Event
Stop Holdoff
(Time, Events)
1
st
Input
Event
Making measurement
Measurement
Complete
Gate Start Enabled
Gate Stop Enabled
Gate sequence: repeated for each reading per trigger
gate
opens
NOTE
The SCPI commands and parameters listed throughout this chapter are provided
as a guide to how the counter is operated programmatically. The commands are
described in detail in the ‘Programmer’s Reference’ section of the Agilent
53210A/53220A/53230A Product Reference CD.