User`s manual

Generating Triangle/Ramp Waves
The TRIWAVE program outputs a triangle wave at 10 kHz, 4 V output
level, and +1 V offset. The commands are:
1. Reset the AFG
*RST
This command aborts any waveform output and selects the 42.9 MHz
reference oscillator source, DDS sample source (that is, trigger start
source), sinusoid function, arm start immediate, 0 V offset, and a 50
output impedance and output load.
2. Select the Reference Oscillator
[SOURce:]ROSCillator:SOURce INTernal[1]
This command selects the reference oscillator source (see “Reference
Oscillator Sources” on page 78). (Although
*RST selects 42.9 MHz
reference oscillator, it is selected here for good programming practice.)
3. Select the Sample Source
TRIGger:STARt:SOURce INTernal[1]
This command selects the sample source (that is, trigger start source).
(Although
*RST selects trigger start source that selects the DDS
frequency generator, it is selected here for good programming
practice.) The
TRIangle/RAMP functions can use any of the trigger
start sources (see “Sample Sources” on page 78).
4. Set the Frequency Range
[SOURce:]FREQuency[1]:RANGe <range>
This command specifies the triangle/ramp wave upper frequency limit
(see “DDS Frequency Generator Ranges” on page 79). (Since
*RST
automatically sets the range to the lower range, it is executed in this
program for good programming practice.)
Chapter 2 Generating Standard Waveforms 65