Keysight E4990A - Page 285

Programming
275
Integer format
Floating-Point Number Format
The figure below shows this format. Numbers are expressed with floating
points. The number of decimal is 12 at default. For example, 1000 is
expressed as "+1.00000000000E+003."
Floating-point number format
Binary Transfer Format
You can select the binary transfer format from the IEEE 64-bit floating
point format or the IEEE 32-bit floating point format depending on the
controller you use.
IEEE 64-bit floating point format
When you select the IEEE 64-bit floating point binary transfer format as
the data transfer format, numbers are transferred in the format shown in
the figure below.
Binary transfer format