Keithley 2520, Руководство пользователя, Страница: 129 / 329

Model 2520 User’s Manual Triggering 8-13
Output trigger
As shown in Figure 8-6 , the Model 2520 can be programmed to output a trigger when
operation leaves the Trigger Layer. This output trigger is typically sent to another instru-
ment to signal the end of a sweep. The TRIG:OUTPut command is used to control this
output trigger. The TRIGger parameter enables the trigger on exiting the Trigger Layer,
and the NONE parameter disables the output trigger.
GPIB defaults
The GPIB defaults are listed as follows. They are also denoted in Figure 8-6 by the “
✛
”
symbol.
• Trigger-In Source = Immediate
• Trigger Count = 1
• Timer = 0.1s
• Enabled output trigger = None
With outputs turned ON (OUTP1 ON), the Model 2520 will perform one measurement
cycle when the INITiate command is sent. After the measurement, the Model 2520 returns
to the idle state.
Operation summary
The trigger model is designed to offer versatility for the various source and measure appli-
cations. It allows you to specify input and output triggers for both single-reading and
sweep operation as follows:
• When sweeps are disabled, the unit will process one set of readings per Trigger-In
Event and provide one output trigger per reading. If the unit is in the Immediate
trigger mode, it will process readings continuously.
• When a sweep is enabled, the unit will perform one sweep per Trigger-In Event.
One output trigger will be generated when the sweep is completed.
Remote trigger commands
Table 8-1 summarizes remote trigger commands. These commands are covered in more
detail in Section 14 , “ Trigger subsystem ” except for *TRG, a common command covered
in Section 12 .