Unipulse f395 Operation Manual page 155

18.Interface
・ What is offset?
The F395 divides the effective area of the sampled waveform into 64 divisions (No.
00 ~ 63). The waveform data of one specified area out of the 64 divisions can be
handled at one time.
Example: Writing the high limit of the first area out of the 64 divisions
・What is offset binary?
The F395 can handle indicated values from -9999 to +9999, where positive and
negative signs must be handled to exchange these numerical values.
To make all elements positive, a fixed numerical value is added to all elements. As a
result, data can be handled without handling such signs. (Generally, the method by
which a fixed offset is given to all elements in notation is called offset binary.)
The F395 adds 32768 (8000H in hexadecimal) to all elements as a fixed value.
Example:
・Check sum
The last two bytes of the total of 32 data are expressed as a 4-digit hexadecimal
number.
141
00
Effective area (64 divisions)
Ｗ ５ ２ Ｓ Ｐ ０ １ ０ ０
Value Offset Binary
-9999 -9999+32768=22769
0 0+32768=32768
+9999 +9999+32768=42767
63
０ １ ０ ０
High Limit First Area
Hexadecimal Notation
58F1H
("H" is a symbol to represent a hexadecimal number.)
8000H
A70FH
・ ・ ・ ・ ・ ・
Binary Data