Keysight E4980AL - Page 268

268 Keysight E4980A/AL Precision LCR Meter
Overview of Remote Control
Data Transfer
8-
Figure 8-24 8 bytes, IEEE754 floating point format
The real number RN represented in the floating point format is provided by
employing the following formula. (EXP: Exponent part (E) converted to decimal,
f: Fractional part (F) converted to decimal notation)
• When
0 < EXP < 11111111111 (2047)
RN = (-1)S x 2(EXP-1023) x {1 + f / (252)}
• When EXP = 0
RN = (-1)S x 2-1022 x {f / (252)}
• When EXP = 0, f = 0
RN = 0
For example,
S = 1
EXP = 0111111 1111 (1023)
f =
1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000
(251)
RN = (-1)1 x 2(1023 - 1023) x {1 + (251 / 252)}
= -1 x 1 x 1.5
= -1.5