HP 70000 series - HP-MSIB Troubleshooting

Abnormal Screen Display
An abnormal screen display may indicate which element or mainframe is faulty. Cycle the
power of the mainframe and the stand-alone display instrument, if one is used, and observe
the screen display. Select the symptom below that is closest to what is observed.
The screen display is blank or distorted.
a. The screen is blank while system reset is occurring. Check the I/O light before assuming
the display is faulty.
b. If a display module (for example, HP 70205A graphics display) is being tested, the screen
display being blank or distorted indicates that the display module may be faulty. Refer to
the
appropriate
technical
reference
or
service
manual
for
further
troubleshooting and
repair information.
c. If a stand-alone display (for example, HP 70206A system graphics display) is being tested,
disconnect the HP-MSIB cables and cycle the power of the stand-alone display. If the
screen is still blank or distorted, the stand-alone display may be faulty. Refer to the
appropriate
service
manual
for
troubleshooting
and repair information.
Except for a message written in large block letters, the screen display is blank. This is a
display-disruptive message which indicates that the display instrument is probably faulty.
Refer to the appropriate service manual for repair information.
The screen display shows the display instrument model number, rmware version, HP-MSIB
address
,
and
HP-IB
address
.
This
symptom
means
that
either
the
display
window is not
assigned
to
the
local
oscillator
,
or
the
display
instrument
is
unable
to
communicate with the
local
oscillator
.
(Check
for
the
ashing
letter
E
which
indicates
an
HP-MSIB
problem.)
a.
Assign
a
display
window
to
the
local
oscillator
by
pressing
4
DSP
5
on
the
HP
70205A
graphics
display
or
4
DISPLA
Y
5
on
the
HP
70206A system graphics display or HP 70004A
color display,then
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NEXT INSTR . (This assigns the display to the master with the lowest
column
address
.)
Press
either
the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NEXT
INSTR
or
8
key
to
assign
the
system
display
to
the
master
with
the
next
highest
column
address
.
b.
if the display window cannot be assigned to the local oscillator in the manner described
above
, then a module with a faulty HP-MSIB interface is hanging up the spectrum
analyzer
, or the HP-MSIB or local oscillator is faulty.To troubleshoot the problem further,
refer to \HP-MSIB Troubleshooting".
HP-MSIB Troubleshooting
There are two methods of troubleshooting HP-MSIB problems.
The \HP-MSIB Troubleshooting Utility," a rmware routine of the display element, veries
element communication over HP-MSIB. By determining which elements are communicating,
the HP-MSIB problem may be isolated. This utility is useful for troubleshooting an HP-MSIB
problem that caused either ashing error indicators or an abnormal screen display.This
utility allows isolation of most problems without removing modules from the mainframe.
Mainframe or display element problems cannot be isolated by this utility.
Note
The HP-MSIB Troubleshooting Utility inhibits normal operation of the HP 70000
Measurement System. Use of the utility may cause the system to require
cycling of power before operation may continue.
This utility is described in detail in the Installation and Verication Manual for the displays.
Troubleshooting 5-25