Setting Sync Signal; Equations - Sony Tektronix VX4792 User Manual

Functional Overview

Setting Sync Signal

Equations

Creating Equation Files
2-18
The SYNC OUTPUT connector generates a 1 V timing signal with a pulse width
of approximately 100 ns when driving a 50 W load. The pulse may correspond to
either the start or end of the waveform or sequence. You can specify the sync
timing using the OUTPut:SYNC command (page 3–64).
When START is selected, the sync signal is generated when the trigger or gate
signal is generated. However, in continuous mode the sync signal cannot be set
to START.
When END is selected, the sync signal is generated at the end of the waveform
or sequence waveform for all modes except burst. In burst mode, the sync signal
is generated at the end of the burst count.
You can create waveform files for the waveform generator using the equation
feature. Equation file data takes the form of mathematical equations. An equation
file (.EQU suffix) is compiled to create a waveform file (.WFM suffix), which
can be loaded into memory to generate an output waveform. This section
describes the steps needed to create a waveform file, the structure and compo-
nents used to make equation files, and several example equations.
A programming example located on page 2–43 shows how to generate wave-
forms using equations. Waveform files are created using a three-step process:
1. Use the EQUAtion:DEFine command (page 3–36) to generate the equation
(.EQU) file.
2. Use the EQUAtion:WPOints commands (page 3–37) to set the number of
points within the waveform.
3. Use the EQUAtion:COMPile command (page 3–35) to compile the equation
file and produce a waveform (.WFM) file.
The compiled waveform file contains the settings for the number of waveform
points and the clock frequency (obtained from the total time set with the range
statement). Other output parameters are set to the default values.
Each compiled waveform has a vertical axis on which –1.0 is data value 0 and
+1.0 is data value 4094. These values have no relationship with the actual output
parameters, which are set with the AMPLitude (page 3–22) and OFFSet
(page 3–59) commands.
VX4792 User Manual