Chapter 4 4-3
Reading Analyzer Data
Output Syntax
Output Syntax
The following three types of data are transmitted by the analyzer in ASCII format:
• response to query
• certain output commands
• ASCII floating-point (FORM4) array transfers
Marker-output commands and queried commands are output in ASCII format only,
meaning that each character and each digit is transmitted as a separate byte, leaving the
receiving computer to reconstruct the numbers and strings. Numbers are transmitted as
24-character strings, consisting of:
Figure 4-1 FORM4 (ASCII) Data-Transfer Character String
When multiple numbers are sent, the numbers are separated by commas. When number
pairs are sent, the numbers are separated by a comma and terminated with a
line feed, <
L
F
>.
Sign ‘−’ for negative, blank for positive.
3 digits Digits to the left of the decimal point.
Decimal Point Standard decimal point.
15 digits Digits to the right of the decimal point.
E Exponent notation.
Sign (in exponent) ‘−’ for negative, ‘+’ for positive.
Exponent Two digits for the exponent.
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