4 - Programming Examples

Step and Pulse Transients

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6 Example

Set the functions that you do not want to generate transients to FIXed mode. A convenient way to do this is with the *RST command. Then set the mode of the function that will generate the transient to STEP or PULSe as required. For example, to enable the voltage function to generate a single triggered output voltage change, use:

*RST

VOLTage:MODE STEP

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

150 volts upon receipt of a trigger, use:

VOLTage:TRIGger 150

Select the trigger source that will generate the trigger. For example, to select the external Trigger In BNC connector as the trigger source, use:

TRIGger:TRANsient:SOURce EXTernal

Trigger sources are discussed in detail under "Triggering Output Changes".

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)

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

To enable the transient system indefinitely use:

INITiate:CONTinuous:SEQuence1 ON

Trigger the transient. This is described in detail under "Triggering Output Changes".

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 GPIB 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 GPIB 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

<device trigger>

Send the GPIB bus trigger

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Agilent Technologies 6811B, 6834B, 6814B, 6843A, 6813B, 6812B manual Step and Pulse Transients, Step Example, 130
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