Stanford Research Systems DS345, Manual

Page: 46 / 139

Arbitrary Waveform Editing
2-30
Data Display
The format of the data display is shown below for both point and vector for-
mat. The data line has two values in both formats. The left value is the point/
vertex number, indicating which point/vertex is being edited. The right hand
value is the data for that point. Only one value is active (flashing) at any
time. The active value is selected by pressing [SHIFT][RIGHT ARROW] or
[SHIFT][LEFT ARROW]. The active value may be changed with the keypad
or MODIFY up/down keys. In vector format the x/y indicator denotes that the
data value is either the x value (h) or y value (y) for the given vertex. The
display is switched between x and y by pressing [STEP SIZE].
Point Format:
00123 1234
Point #
Point Value
Vector Format:
0123 h 1234
Vertex #
data Value
x/y indicator
POINT EDITING
The following section describes editing point format arbitrary waveforms.
Point Number
The point number may be set to any value between 0 and the total number of
points in the current waveform. The point number is set by either the keypad
or the MODIFY up/down keys. The maximum point number is 16,299 (there
must more than 8 and less than 16,300 points in a waveform). If the point
number is set to a value greater than the maximum (where there is no data),
an "edit error" will result. Also, if the waveform has fewer than 8 points the re-
maining points will automatically be filled with zeroes to bring the number of
output points to 8.
Point Value
Each point may have an amplitude value ranging between -2048 and +2047
(12 bit DAC). If a point has no value (before a value has been entered, for ex-
ample) the data will be displayed as five dashes (-----).
Adding a point to the
end of the waveform
To add a point to the end of a waveform set the point number to the last point
+ 1. The value will be displayed as ----- prior to entering a value. Enter a new
value for the point value.
Deleting a Point
To delete a point, enter the point number to be removed. Then, with the point
number active (flashing), press [CLR]. The remaining points will automatically
be renumbered as necessary.
Duplicating a Point
To duplicate a point, enter the point number to be copied. While the point
number is active (flashing) press any UNITS key. The point will be duplicated
and the point number incremented to display the new point.
Inserting a Point
To insert a point in the middle of a waveform, duplicate the point currently at
the insertion point. It is easy to modify this new point to the desired value.