Programmable Sweep
(See section 6.3 for the procedure)
A programmable sweep created in advance on a PC (sweep pattern file in CSV format)
is loaded into the GS820, and the GS820 sweeps the source level along the program file
pattern. Arbitrary items other than the source level can also be swept simultaneously. The
step count can be set to any value up to 100000. If the step count of the sweep pattern
exceeds 100000, the first 100000 steps are loaded.
Programmable Sweep Example
When source waveform is DC
When source waveform is pulse
Pulse base value
Trigger count
Source level
Sweep start
Trigger count
Source level
Sweep start
Trigger
Trigger
Trigger Trigger Trigger Trigger Trigger Trigger Trigger
Trigger
Trigger
Trigger
Program File
The program file is stored in the PROGRAM directory on the built-in non-volatile storage
(GS820ROM) using the USB storage function (page 2-36).
Sample.csv that is stored in the PROGRAM directory when the GS820 is shipped from
the factory or when the storage is formatted is a sample program file. The contents of the
file can be viewed on the display.
Contents of the Program File
In programmable sweep, the GS820 loads arbitrary waveform data up to 100000 points
in CSV format that has been edited on a spreadsheet application or a text editor and
executes the sweep operation. The source level can be changed at a minimum interval
of 100
µ
s. See appendix 1, “Program File Examples.”
1 V
2 ms 3 ms
4 ms
5 ms
6 ms
7 ms
4 V
2 V
1 V
5 V
7 V
SL , T1, HL, LL,
1.0 , 2E-3
4.0 , 3E-3
2.0 , 4E-3
1.0 , 5E-3
5.0 , 6E-3
7.0 , 7E-3
... ,
... ,
... ,
... ,
... ,
... ,
... ,
... ,
... ,
... ,
... ,
Title line
Data lines
Program file
Lines
The program file is a text file containing lines separated by line feed code (CR, LF, or
CR+LF). Control parameters of at least a line are defined. If multiple items are defined
in a line, each item is defined using integers, real numbers, and character strings with a
separator (select comma or semicolon) between each item (CSV format). It is possible
to add an arbitrary space or tab (white space) before or after each item. If a term is
undefined, that item does not change from the previous setting.
Character String
• If a term is a character string, the entire character string can be enclosed in double
quotations.
• If the start or end of the character string is a white space or if the character string
includes a separator, it must be enclosed in double quotations.
• The characters in a character string is not case-sensitive.
2.5 Sweep
2-22
IM 765601-01E
