Stanford Research Systems DS345, Manual

Page: 47 / 139

Arbitrary Waveform Editing
2-31
POINT EDIT EXAMPLE
The following is a step-by-step example for creating a point format waveform.
We will create an 8 point waveform with the values 0,400,800,1200,0,0,0,0.
Along the way we will make some mistakes that we will fix using the editing
facilities. To watch the waveform grow, display the FUNCTION output on an
oscilloscope. Trigger the scope on the SYNC output.
1) Press [FUNCTION DOWN ARROW] until ARB
LED is lit.
2) Press [SHIFT][ARB EDIT] three times to dis-
play Arb clear line, then press any [UNITS] key.
3) Press [SHIFT][ARB EDIT] and use MODIFY
keys to set "Entry" to POINT.
4) Press [SHIFT][ARB EDIT].
5) Press [SHIFT][RIGHT ARROW]. Then [0]
[UNITS].
6) Press [SHIFT][LEFT ARROW]. Then any
[UNITS] key.
7) Press [SHIFT][RIGHT ARROW], then [4][0][0]
[UNITS].
8) Press [SHIFT][LEFT ARROW], [MODIFY UP
ARROW].
9) Press [SHIFT][RIGHT ARROW], then [8][0][0]
[UNITS].
10) Press [SHIFT][LEFT ARROW]. Then press
[UNITS] twice.
11) Press [MODIFY DOWN ARROW], [SHIFT]
[RIGHT ARROW], and [1][2][0][0][UNITS].
12) Press [SHIFT][LEFT ARROW], [MODIFY UP
ARROW].
13) Press [CLR].
14) DONE!
Set output function to ARB.
Set point entry mode if necessary.
Clear arb function. The message "arb cleared" will
be displayed.
Display edit line. It should read "00000 ------".
Point number 0 (the first point) has no data.
Activate point value field and set y value for point
zero to 0.
Activate point number. Duplicate point by press-
ing UNITS key. Point # 1 now has y = 0.
Activate y value. Set point # 1 y value to 400.
Set display to point #2. Y value currently is ------.
We will add a point to the end of the waveform
Activate point #2 y value and set to 800.
Activate point number. Duplicate point number 2
twice. Display shows point number 4 (last point
made). Points 2,3, and 4 now have y value 800.
Decrement point number to point #3. Activate y
value and set to 1200. Oops! Point #4 is extra!
Activate point number and increment to point #4.
Delete point #4. y value becomes ------ (no data).
We only entered 4 data points. The DS345 will
automatically fill in the 4 trailing zero values when
it loads the waveform RAM. The DS345 only adds
enough zeroes to make the total number of points
equal to 8, and none if there are 8 or more points.