Programming
Manual
for
more
information
on
the
UST
A
TE
command.
The
UST
A
TE
command
outputs
the
entire
contents
of
the
HP
70900B
local
oscillator
source
RAM
(including
System
Diagnostics)
to
the
HP-IB
.
Saving
the
Contents
of
RAM
The
following
program
lines
demonstrate
a
suggested
procedure
to
read
or
write
the
memory
of
the
HP
70900A/B
local
oscillator
source
.
Note
The
HP-IB
address
of
the
local
oscillator
is
usually
set
to
718
before
shipping.
If
your
local
oscillator
has
a
dierent
HP-IB
address
,
use
that
address
in
line
270
of
the
example
READ
LO
and
line
70
of
the
example
WRITE
LO
rather
than
718.
This
program
reads
the
HP
70900
USER
memory
area
and
writes
this
data
to
a
user-specied
storage
le
.
It
is
intended
to
be
used
to
store
previously
loaded
DLP
s
prior
to
allocating
the
USER
memory
for
another
purpose
.
Its
companion
program,
WRITE
LO
,
is
used
to
restore
the
data
read
by
this
program.
This
program
will
read
data
blocks
up
to
32
Kbytes
in
length
until
all
USER
memory
has
been
read.
This
method
of
programming
is
used
to
avoid
a
B
ASIC
run-time
error
which
occurs
when
a
string
is
made
greater
than
32
Kbytes
long.
The
operator
should
edit
lines
270
and
280
of
the
READ
LO
and
lines
60
and
70
of
the
WRITE
LO
if
they
do
not
accurately
reect
his
conguration.
Note
It
is
not
possible
to
restore
USER
memory
from
one
version
of
HP
70900A/B
local
oscillator
source
rmware
into
another
version
of
rmware
using
this
program.
CA
UTION
Before
writing
to
memory
,
check
to
ensure
that
there
is
nothing
of
value
stored
in
RAM.
Writing
to
RAM
will
write
over
anything
previously
stored.
T
roubleshooting
5-17
Summary of Contents for 70000 series
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Page 346: ...Figure A 2 Simpli ed Lightwave Signal Analyzer Block Diagram Theory of Operation A 3 ...
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