HP 54501A - WORD Format; BYTE Format; COMPRESSED Format; ASCII Format

BYTE
Format
BYTE
format
allows
only
seven
bits
to
be used
to represent
the
voltage
values,
with
the
first
bit
being
the
sign
bit.
If
there
is
a
hole in
the
data,
it
is
represented
by a
value
of
-1.
BYTE
formatted data
will
transfer
over
the
HP-ffi
faster
than
WORD
formatted
data,
since
one
byte
per
point
is
transferred
in
BYTE
format
and
two
bytes
per
point
are
transferred
in
WORD
format.
BYTE
formatted
data has
less
resolution than WORD
formatted
data.
COMPRESSED
Format
The
number
of
bytes
transmitted
when
the
format
is
COMPRESSED
is
the
same
as
the
value returned
by
the
WAVEFORM:POINTS?
query.
Eight
bits of
resolution
are
retained
in
the
COMPRESSED
format.
So
that
a
hole in the
data
may
be
represented,
a
data value
of
255
is
mapped
to
254,
and
255
is
used
to
represent
a
hole.
This
mode
will
give
greater
vertical
precision
than BYTE
formatted
data,
with
faster
transfer
times
than
WORD
formatted
data,
but
will probably
require
more
time
once
transferred
to
be
unpacked.
ASCII
Format
ASCII
formatted
waveform
records
are
transmitted
one
value
at
a
time,
separated
by
a
comma.
The
data
values
transmitted
are
the
same
as
the
values
sent
in the
WORD FORMAT
except
that
they
are
converted
to
an
integer
ASCII
format
(six
or
less
characters)
before
being
sent
over
the
HP-IB.
Waveform Subsystem
17-6
HP54501A
Programming