AMETEK Lx Series II Programming Manual User Manual
Page 137
Programming Manual
Lx \ Ls Series II
133
2. Set the triggered level of the function that will generate the transient. For example, if the
previously programmed voltage function is going to step the output voltage amplitude to 135
volts upon receipt of a trigger, use:
VOLTage:TRIGger 135
3. Select the trigger source that will generate the trigger. For example, to select the external
Trigger In1 SMA connector as the trigger source, use:
TRIGger:TRANsient:SOURce EXTernal
Trigger sources are discussed in detail under "Triggering Output Changes".
4. Only perform this step if you have selected PULSE as the transient mode in Step 1. Specify
the pulse count, the pulse period, and then either the duty cycle or the pulse width using the
following commands:
PULSe:COUNt 1
specifies 1 output pulse
PULSe:PERiod 1
specifies a pulse period of 1 second
PULSe:DCYCle 50
specifies a duty cycle of 50%
PULSe:WIDTh .5
specifies a pulse width of .5 seconds (not necessary in this case
since a duty cycle has already been specified)
5. Initiate the transient trigger system to enable it to receive a trigger. To enable the trigger
system for one transient event use:
INITiate:IMMediate:SEQuence1
6. To enable the transient system indefinitely use:
INITiate:CONTinuous:SEQuence1 ON
Trigger the transient. This is described in detail under "Triggering Output Changes".
Example
The following example programs a voltage dropout for 2 cycles of a 120 volt, 60 Hz output. The
dropout begins at the positive peak of the output voltage waveform (90 degrees phase) and is
triggered by IEEE-488 bus trigger.
*RST
Begin at power-on state
VOLT 120
Set initial output voltage (immediate-level)
FREQ 60
Set initial output frequency
OUTP ON
Enable the output
VOLT:MODE PULS
Enable output to generate pulses when triggered
VOLT:TRIG 0
Set the voltage dropout (triggered level)
PULS:WIDT .03333
Set pulse width for 2 periods
TRIG:SOUR BUS
Respond to IEEE-488 bus triggers
TRIG:SYNC:SOUR PHAS
Synchronize triggers to internal phase reference
TRIG:SYNC:PHAS 90
Sets internal phase reference point to 90 degrees
INIT:SEQ1
Set to Wait-for-trigger state
Send the IEEE-488 bus trigger