HP 54501A Programming Reference Manual page 67

#
<non-zero
digi t>
v
— <d
igi t>
<8-b
i t
dato
byte>
Figure 3-26.
<
definite length arbitrary block
>
Where
<
ASCII
data type
>
represents any ASCII-cncoded byte
except
<NL>
(OA.10
decimal).
1.
The
END
message provides
an umambiguous termination to an element that
contains
arbitrary
ASCII
characters.
2.
The
IEEE
488.1
END
message serves the dual function for terminating
this
element
as
well
as
terminating the <
RESPONSE MESSAGE
>.
It
is
only
sent once
with
the last
byte
of the indefinite block data. The
NL
is
presented
for
consistency
with the
<
RESPONSE MESSAGE TERMINATOR >.
Figure
3-27.
<
arbitrary ASCII
response
data
>
<
response
data separator
>.
A
comma separates multiple
pieces
of
response data within
a
single
< response message unit
>.
54120/BL69
Figure 3-28.
< response data separator >
HP
54501A
Programming
Message Communication and System Functions
3-25