HP 54501A Programming Reference Manual page 39

The
easiest
method of entering
a
digitized waveform from
the instrument
is
to
use the
ASCII
format and place the information
in an integer array.
The
data point
is
represented
by signed six-digit integers whose
values
range from
0
to
32,640.
You
must
scale the integers
to determine the
voltage value
of
each point. These integers are passed starting with the
leftmost point on the instrument's display.
For more
information, refer to
the chapter "Waveform
Subsystem."
HP 54501A
Introduction to Programming an Oscilloscope
Programming
1-21