Service Model 8901B
8-8.
ERROR
MESSAGES
General
The instrument generates error messages to indicate operating problems, incorrect keyboard entries,
or
service-related problems. The error message is cleared when the error condition is removed.
Error Message Catagories
Errors
01
through 19,30 through 39,
and
90
through 99.
These are Operating Error Messages, which
indicate that not all conditions have been met to assure a calibrated measurement. Operating Error
Messages
can
usually be cleared by readjustment of the front-panel controls. The Error Disable Special
]Function 8 can be used to selectively disable certain error messages. More information on Operating
Error Messages and error message disabling
can
be found under
Error Message Summary
and
Error
Disable
in Section 3 and on the
Operating Information
pull-out card.
Errors
20
through 29.
These are Entry Error Messages, which indicate that an invalid key sequence
or
keyboard entry has been made. These errors require that a new keyboard entry
or
function selection
be made. More information on Entry Error Messages can be found under
Error
Message Summary
in
Section
3
and on the
Operating Information
pull-out card.
Errors
40
through
64.
These are Measurement Progress
Error
Messages which indicate
if
a given
segment of the measurement cycle has been traversed. These messages are not normally enabled.
Errors
65
through 89.
These are Service Error Messages which provide additional service-related
information and are discussed below. Service Error Messages do not necessarily infer that the
instrument has a problem but may indicate a normal phenomenon under the particular circumstances.
These messages are not normally enabled.
Enabling Measurement Progress and Service Error Messages
Service Error Messages (Errors 40 through 89) are not normally displayed. When a service-related
problem is suspected, enable the display Measurement Progress and Service Error Messages by keying
in Special Function 43.N with
N
determined as follows:
N=O
N=l
Disables display
of
Service Error Messages 65 through 89.
Enables display of Service Error Messages 65 through 89. Cleared by AUTOMATIC OPERATION
key.
N=2 Enables display of Service Error Messages 65 through 89. Not cleared by AUTOMATIC
OPERATION key.
N=40 through N=89 and N=140 through N=189. Enables measurement
to
pause
or
halt on
Measurement Progress and Service Error Message indicated by
N.
See the following paragraphs
for details.
Measurement Progress Error Messages (Errors
40
through
64)
These Service Error Messages are used
to
check the progress
of
a measurement. Refer
to
Table 8B-4,
Measurement Progress Error Codes
and Figure 8D-5,
Modualtion Analyzer Software Supervisor
Flow
Chart. To
see
if
the measurement progresses through a particular segment
of
the flow chart, enable the
error code corresponding to the segment in either
of
the
two
following ways:
1.
To cause the measurement
to
pause momentarily (approximately
1/2
second) and display the error
code when the segment
is
encountered and then to continue on, key in 43.N SPCL, where the
suffix
N
is the error code of the segment.
2.
To cause the measurement to halt and display the error code when the segment is encountered,
key in 43.N SPCL, where N is the error code
of
the segment plus
100.
Press CLEAR to exit.
8B-14
Error
Messages
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