Agilent Technologies 6811B User Manual page 51

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
1. On the Function keypad, press Output On/Off to enable the output. The Dis
annunciator will go off.
2. Press Voltage to access the Voltage Menu. On the Entry keypad, press 1 2 0 Enter.
Access the Voltage Menu again and press ô to access the triggered voltage
3.
command.
4. On the Entry kepad, press 1 0 2 Enter.
Access the Voltage Menu again and press ô to access the voltage mode command. It
5.
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.
6. Press Trigger Control and Enter. This initiates (or enables) one immediate trigger
action.
Press Shift Trigger. This sends the ac source an immediate trigger signal to change
7.
the output voltage. The triggered voltage value now becomes the VOLT value.
Pulse Transient
In the following example, the output is four 83.3-millisecond, 120 Vrms pulses at 60 Hz. The figure
shows the trigger, pulse count, pulse period, and duty cycle.
NOTE:
From the Output Menu, execute the *RST command to reset the ac source. This is
necessary because any previously programmed functions remain in effect until cleared.
Trigger
120Vrms
102Vrms
83.3ms
250ms
Figure 4-5. Pulse Transients
count = 4
Front Panel Operation - 4
Display
0 V 60 Hz
VOLT 120
VOLT:T 0
VOLT:T 102
VOLT:M STEP
INIT:IMMED
102 V 60 HZ
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