Filter
Top Products
4 - Front Panel Operation
44
4 - Using Transient Voltage Modes
The ac source voltage can be programmed in the following transient operating modes:
STEP causes the output to permanently change to its triggered value.
PULSE causes the output to change to its triggered value for a specific time, as determined by the
Pulse menu parameters.
LIST causes the output to sequence through a number of values, as determined by points entered
in the List menu.
FIXED disables transient operation for the selected function.
Step Transient
The Voltage Menu lets you specify an alternate or triggered voltage level that the ac source will apply to
the output when it receives a trigger. Because the default transient voltage level is zero volts, you must
first enter a triggered voltage before you can trigger the ac source to change the output amplitude. Refer
to Chapter 4 of the Programming Guide for more information about programming triggers.
In the following example, the voltage output is set to 120 Vrms and then stepped down to 102 Vrms.
Action Display
1.
On the Function keypad, press Output On/Off to enable the output. The Dis
annunciator will go off.
0 V 60 Hz
2.
Press Voltage to access the Voltage Menu. On the Entry keypad, press 1 2 0 Enter.
VOLT 120
3. Access the Voltage Menu again and press ô to access the triggered voltage
command.
VOLT:T 0
4.
On the Entry keypad, press 1 0 2 Enter.
VOLT:T 102
5. Access the Voltage Menu again and press ô to access the voltage mode command. It
should be in the default FIXED mode. An ac source function in the FIXED mode
does not respond to triggers. On the Entry keypad, press ¯ or ° to scroll through
the mode parameters. When you have STEP, press Enter.
VOLT:M STEP
6.
Press Trigger Control and Enter. This initiates (or enables) one immediate trigger
action.
INIT:IMMED
7.
Press Shift Trigger. This sends the ac source an immediate trigger signal to change
the output voltage. The triggered voltage value now becomes the VOLT value.
102 V 60 HZ
On three-phase ac sources the voltage steps are phase selectable. You can output a different voltage
step for each phase. To do this, use
Phase Select to first choose the desired phase, as previously
described in example 1 for setting the immediate output voltage.