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SECTION 4
GPIB Interface
C:
d:
e:
Indicates
the parameter mantissa. The mantissa in-
cludes a polarity
sign (+ or -), numeric value,
and
decimal point. When the polarity
sign is omitted, the
plus sign (+) is assumed. Parameters are described in
detail in the following
paragraph.
Indicates the exponent. Depending
on the type of pro-
gram code, an exponent may not be included with the
parameter.
Indicates
the semicolon
used to separate program
codes for readability.
There is no limit on the number
of semicolons, and the semicolon can be omitted. The
semicolon is also ignored and is not stored in the GPIB
input buffer.
Numeric
Format of Parameter-Setting
Messages
The three formats described below are used for the vari-
ous parameter-setting
messages.
NRl Format
In the NRl format, numeric values are specified as inte-
gers. No decimalpointis
used in this format. The decimal
point is assumed to be at the end of the last character.
km
/
l
Leading zeroes and spaces are ignored
l
Sign (+ for positive, -for negative, + is
assumed if sign is omitted).
Examples:
+01234
-500
18
NR2 Format
In the NR2 format, numeric values are specified as real
numbers. NR2 numeric values include a decimal point,
but digits to the right of thedecimalpoint
canbe omitted.
fDD.DD
I
I
L- I.
Leading zeroes and spaces are ignored
l
Sign (+ for positive, -for negative, + is
assumed if sign is omitted).
Examples:
+012.34
-50.0
1.8
NR3 Format
In the NR3 format, numeric values are specified in expo-
nential form. The exponent character, E, and subsequent
sign and numbers can be omitted. When the exponent is
omitted, E+OO is assumed, and the value is handled as an
NR2 format parameter.
+DD.DD E&kDD
L .
.
I.
Leading zeroes and spaces are
ignored
Sign (+ for positive, -for nega-
tive, + is assumed if sizn is
omitted).
Same as NR2 format.
Examples:
+012.34E+03
-5O.OE-06
1.8E-09
4-8
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