Analyzing wavef
orms
13. P ress the Sync button and wait
for a status of Not C ounting (about
6 seconds). De
pending on the signal
quality, you may need to press the Sync
button more than once.
Sync gets the
oscilloscope synchronized to
the signal.
A status of No Signal status indicates that
the oscillos
cope cannot detect the signal.
Yo u may need to turn on the output of the
signal generator or AWG. A status of No
Sync may ari
se for Bit tests that require
a known pattern length, sync pattern, or
alignment character.
14. Press the Learn button, if visible. Learn
only appl
ies to some Bit Error Tests.
Frame, Symbol, and Character tests
do not require the learn operation.
Learn dis
covers the repeating pattern
in the signal and stores it into system
memory for comparison to the signal to
determi
ne errors in the signal. Once a
signal is in memory, it remains there until
a subsequent Learn operation, so you
don’t ha
ve to use the Learn button every
time you start testing for errors.
15. Press t
he Run button to start the error
detector.
If desired, you may press Stop or R eset at
anyti
me. After a Stop, you can press R un
again.
Run starts the Error Detector testing for
error
s.
16. S elect the Results tab to s ee the results
of running the error detector.
NOTE. The Serial Error Detector
automatically resyncs and resets all counts
to zero if you press Reset or disconnect and
then reconnect the signal.
138 MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO 5000B Series U ser M anual
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