
2.
Status
Indicators
The
mainframe
and
all
elemen
ts
ha
v
e
t
w
o
t
yp es
of
status
indicators.
The
ERR
(error)
indicator
indicates
a
fault
of
some
kind.
The
A
CT
(active)
indicator
sho
ws
that
an
elemen
t
is
activ
e
(that
it
is
b eing
con
trolled
or
accessed).
The
status
indicators
for
a
display
are
the
letters
E
and
A
in
the
low
er
right
corner
of
the
display
in
the
display
status
blo
c
k.
All
other
elemen
ts
ha
v
e
ERR
and
A
CT
indicators
on
the
fron
t
panel.
The
HP
70206A
System
Graphics
Display
has
an
I/O
error
indicator
that
lights
when
only
one
HP-MSIB
cable
is
connected
to
the
HP
70206A.
The
indicator
is
o
if
b oth
cables
are
either
connected
or
disconnected.
Status
Error
Indicator
A
slav
e
error
causes
the
ERR
indicators
to
light
on
b oth
the
slav
e
and
the
master.
The
ERR
indicators
go
out
when
the
fault
condition
is
cleared
and
is
rep orted.
\Error
Message
Reporting"
in
the
system-master
installation
and
v
erication
man
ual
pro
vides
a
full
description
of
error
rep orting.
The
status
ERR
indicator
LED
ashes
at
a
1-Hz
rate
when
a
comm
unication
o
v
er
HP-MSIB
is
not
satisfactorily
completed.
If
the
error-indicator
LED
of
more
than
one
of
the
sp ectrum
analyzer's
mo
dules
simultaneously
ash
at
a
1-Hz
rate,
refer
to
the
installation
and
v
erication
man
ual
of
the
system
master.
Some
errors
may
only
b e
presen
t
when
the
sp ectrum
analyzer
is
sw
eeping.
These
errors
cause
the
error
indicator
to
ash
at
the
sw
eep
rate.
Note
It
is
p ossible
that
the
error
indicator
may
not
b e
ashing
on
a
mo
dule
that
has
disrupted
all
HP-MSIB
comm
unication.
Y
ou
can
isolate
status-indicator
problems
b
y
substituting
master,
mo
dules,
or
mainframe.
Since
there
are
no
op erator
adjustmen
ts
or
repairs,
y
ou
should
refer
brok
en-assem
bly
problems
to
qualied
tec
hnical
p ersonnel.
Activ
e
Indicator
The
following
conditions
turn
on
the
A
CT
LED:
The
mo
dule
is
p erforming
a
function
directed
b
y
man
ual
con
trol
of
the
display
k
eyb oard.
The
mo
dule
is
making
a
measuremen
t
and
its
master
has
k
eyb oard
con
trol
of
the
display
.
The
instrumen
t
is
in
self-test
mo
de.
Refer
to
the
system-master
installation
and
v
erication
man
ual
for
additional
detail
related
to
the
A
CT
LED.
When
the
address
map
cursor
is
at
the
address
of
an
elemen
t,
the
elemen
t's
A
CT
indicator
lights.
It
is
th
us
p ossible
to
determine
an
elemen
t's
address
b
y
scrolling
through
the
map.
5-2
Troubleshooting
Содержание 70301A
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Страница 32: ...Figure 2 3 HP 71210C with HP 70300A and HP 70301A Rear Panel Cabling 2 6 Installation ...
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