347
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16.3 Troubleshooting
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16
17
18
19
5
6
7
8
9
10
11
12
13
14
A
Problem Check Ref. pag
LED does not light when the unit is
turned on.
Is power cord connected properly?
15, 16
Even when the START key is
pressed, no data is printed.
Is the "Pretrigger stanby" message displayed?
(When pretriggering is activated, triggering does no
occur until the current waveform is fully captured.)
173
Has the "Waiting for trigger" message appeared?
Check the trigger settings.
170
There is absolutely no variation in the
recorded waveform.
Is the measurement range setting appropriate? 121
Has a low pass filter been set? 129
Has the vernier function been set? 267
Has baseline offset been set? 127
The printed recording is non-existent. Is the recording paper back to front? 28
Even when the PRINT or the
COPY key is pressed, no data is
printed.
Make sure the destination of the printout created b
pressing the PRINT key or the COPY key is set
to "Internal Printer."
230, 231
The printed recording is very faint Are you using the correct recording paper? (9221) ii
During memory recorder operation,
the apparent frequency of the
recording is much lower than the
expected frequency.
This is likely to be an aliasing error.
Make the time axis range setting faster.
For more details see "Time Axis Range Setting
and "Aliasing Distortion."
APPENDIX
Recording lines are dense or blurred.
Input signal contains ripple components. Make
suitable filter settings at input unit.
129
Recording lines are duplicated.
When "Dotted line" is selected as the printed line
type in the waveform display color settings, the top
and bottom of the line become separated by a 1-dot
gap. With waveforms that have little variation, this
can cause waveform printing to appear variously as
one line or as two lines. To correct this, select "Solid
line" as the printed line type.
118
The keys are dead and do not
respond.
Has the unit been put into the key lock condition
(message "KEY LOCK" appeared?
Press the KEY LOCK key to clear the key lock
condition.
276
Is the unit being remotely controlled ("GP-IB
REMOTE" is displayed, if the GP-IB interface is
being used)?
*
Some channles cannot be used. Is the number of channels to be used restricted? 204
The size of a waveform does not
change, even if the input range is
changed.
Has the variable function been enabled?
Disable the variable function. 163
6.3 Troubleshooting
If the unit does not seem to operate normally, check the following points before requesting
service.
*: See the 9558 Instruction Manual.
If none of the above conditions apply, and the cause of the problem is not understood, try
performing a SYSTEM RESET. All the settings will revert to the factory settings. Try the
following operation, 1 or 2.
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