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Waveform Programming Language
AWG610 Arbitrary Waveform Generator User Manual
3-177
Waveform Files
Some commands accept a waveform file name enclosed in double quotes. For
example: ”sinewave.wfm” . Observe the following rules when using waveform
expressions in equations:
H A quoted string can include any character defined in the 7-bit ASCII
character set.
H A numeric value can be embedded in a string in the following format:
“AA”:i:“.WFM”
If the value of i equals 10, the string “AA10.WFM” will result. Before
conversion into the string, the value is rounded to the nearest integer.
H One waveform expression can include a maximum of 10 input files. If the
same file name appears more than once in a single waveform expression, that
file is considered as one file. An exception to this is that “A.WFM” and
“A.WFM”.marker1 are two different files.
H Signal names, as well as variables, are permitted in a waveform expression.
Waveform expressions enable you to specify calculation between waveforms
in a similar manner as ordinary expressions. For example, if you code the
following:
“A.WFM” = sin(2*pi*scale) + “B.WFM”
A.WFM is produced as the sum of the sinewave equation and B.WFM
waveforms.
The output name, placed to the left of an ‘=’, and the name used in the expres-
sion to the right of an ‘=’ is a <signal-name>. The marker data may be specified
as follows in addition to the name of an ordinary waveform file:
“A.WFM”.marker2 = “A.WFM” > “B.WFM” > “B.WFM”
In this example, 1 is set if the A.WFM value as the A.WFM marker 2 value is
larger than the B.WFM value; 0 is set otherwise. (This is the same as for the
compare function of the editor.) The A.WFM analog data is unchanged.
“B.WFM”.marker1 = “A.WFM”.marker1 + “A.WFM”.marker2
In this example, B.WFM’s marker1 is set if either marker 1 or 2 of A.WFM is 1.
Waveform Expression