Checking
for
Error
Messages:
Spectrum
Analyzer
System
with
a
Controller
The
following
procedure
uses
an
external
controller
to
query
the
system
master
(HP
70900A
Local
Oscillator)
about
whether
it
is
using
an
internal
or
external
frequency
reference
.
An
HP
70000
Series
display
does
not
have
to
be
present
in
the
system.
1.
Connect
an
HP
9000
Series
200
controller
(running
HP
B
ASIC
2.0,
3.0,
or
4.0)
to
the
system's
HP-IB
connectors
.
2.
Execute
the
following
code
to
display
the
status
of
the
local
oscillator
.
In
line
5
below
,
the
local
oscillator's
HP-IB
address
is
set
to
718.
If
the
factory-preset
address
has
been
changed,
modify
the
code
to
reect
the
current
address
.
5
LO_addr=718
!Set
LO
address
10
CLEAR
Lo_addr
!Initialize
analyzer
HP-IB
interface
15
OUTPUT
Lo_addr;"IP;";
!Initialize
analyzer
20
DIM
Answer$[2400]
!Create
ANSWER
as
variable
for
data
25
OUTPUT
Lo_addr;"DSPTEXT
EXTEND?;";
!Interrogate
LO
for
extended
state
30
ENTER
Lo_addr
USING
"-K";Answers$
!Return
data
to
ANSWER
35
FOR
I=1
TO
LEN(Answer$)
40
IF
Answer$[I,I]=CHR$(10)
THEN
45
PRINT""
50
ELSE
55
Answer$[I,I];
!Display
data
60
END
IF
65
NEXT
I
70
CLEAR
Lo_addr
75
OUTPUT
Lo_addr;"IP"
80
END
3.
V
erify
that
the
HP
70900A
Local
Oscillator
is
using
the
HP
70310A
module
as
its
frequency
standard
by
verifying
that
the
displayed
status
description
includes
the
statement
REF:EXTERNAL .
4.
If
the
status
description
of
the
local
oscillator
does
not
indicate
the
use
of
an
external
reference
,
and
the
installation
has
been
rechecked,
refer
to
the
troubleshooting
information
in
the
Installation
and
V
erication
Manual
for
the
system
master
.
2-14
Installation
Summary of Contents for 70310A
Page 6: ......
Page 14: ...Figure 1 2 HP 70310A Module with Accessories 1 4 General Information ...
Page 30: ...Figure 2 3 External Power Pack Installation 2 4 Installation ...
Page 64: ......
Page 66: ......
