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Malntenance
-
4g4N494Ap
Service
Vol.
1
ADDR
(instrument
bus
address)
command
These
commands
and queries
are
transmitted
to
the
!ryl*rn
Anatyzer
with
ihe
pRtNT
st#ment.
rne
upecrrum
Anatyzer
resp-onse
to a
query
is
input
into
a
string
variable
with
the
tNpUT
statement.
A string
vari-
able
is-formeclpV
endinO
th€
variable
name
with
a
doilar
sign ($),
€.9.
A$,
Xt$.
FOr
thE
GPIB
PRIMARY
ADDRESS,
ENtEr
tIiE
9"_g'g"l
equivalent
of
the
spectrr,
"n"lyi"r
rear-panel
GPIB
ADDRESS
switch
settings.
'.'--'
B.
419
chip
select
outputs
from
U1044
and
Uptton
switch
enable
lines
on
the
Memory
board.
4416-92A
HEX
DIGIT
-
A
character
in
the
sequence
0
through
9
and
A
through
F
that
represents
a
hexade_
cimal
digit.
The
two
digits
(in
ordei;
torm
a
number
to
represent
a
location
on
the
instrument
bus
used
by fot_
lowing
DATA
commands.
lf
a character
is
not
a
hexa-
decimal
digit
or
part
of a
pair
of
digits,
it
is
not
used
to
€xecute
the ADDR
command,
and
an
error
is
reported.
ADDR (instrument
bus
address)
query
DATA (instrument
bus
data)
command
HEX
DIGITS
-
As
with
ADDR,
a
pair
of
digits
forms
a hexadecimal
number.
The
number
is
a data
value
to
b€ sent
on
the instrument
bus
to the location
specified
by the
last ADDR
command.
This
allows
internal
spec-
trum
analyzer
parameters
to be set for
service:
these
parameters
control
functions
by setting
the status
or
mode
of
spectrum
analyzer
circuit
assemblies.
Up
to
.16
pairs
of
characters
are
accepted.
lf
a character
is
not
a
hexadecimal
digit or
part
of
a
pair
of
digits, the
data
byte
formed
by
the
pair
is not
executed
and an
error
is
reported.
Also,
an error
is
reported
when
data is
sent
to
an
invalid
address.
Response
to
ADDR
query
r_----{-a
6-55
Figure
6-39.
Insfument
bus
check.