Instrument Control And Basic Waveform Generation - Sony Tektronix VX4792 User Manual

Programming Examples

Instrument Control and Basic Waveform Generation

2-40
This procedure describes the general approach for loading a waveform file,
changing the waveform parameters, and enabling the output. When performing
this example, you can view the output waveform on an oscilloscope to see how
each new command changes the output parameters. The procedure assumes that a
waveform file already exists in the computer memory.
NOTE. If no waveform data is located in the internal memory of the VX4792 Ar-
bitrary Waveform Generator, the WAVEFORM OUTPUT connector cannot be
activated.
1. Load the waveform data into waveform memory with the following
command:
WAVEFORM "sample.wfm"
where sample.wfm" is a waveform file that is in the waveform generator
memory.
2. Change the output parameters as desired. You can alter clock source, clock
frequency, maximum full-scale voltage, offset voltage, low pass filters, and
many other parameters. For example, the commands
CLOCK:FREQUENCY 250MHZ
AMPLITUDE 5
OFFSET 1
FILTER M1
will set the source clock frequency to 250 MHz, the maximum full-scale
voltage to 5 V, the offset voltage to +1 V, and activate the low pass filter
with a cut-off frequency of 1 MHz. You can verify your settings with the
CLOCK:FREQUENCY? and CH1? queries.
3. Activate the output at the WAVEFORM OUTPUT connector with the
following command:
OUTPUT:STATE ON
The LED beside the WAVEFORM OUTPUT connector turns green to show
the output is active.
VX4792 User Manual