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2-32
Making Measurements
If You Have Problems with a Measurement
Possible Solutions to
Message Line Errors
The signal processing hardware that is used to generate measurement results has to
be told when to take data samples. If the trigger to do this is misaligned with the
signal, there may be errors in the results that are displayed.
Trigger Timing A
Check if the trigger is being received.
On the MEAS SYNC screen (press to gain access), check if the
correct burst type has been defined.
Trigger Timing B
Check if the trigger is being received at the correct time.
The First Bit field (A) , see Figure 2-17 on page 2-32, on the Phase Freq: Data
Bits screen displays the time difference between when a trigger is being received
and when the first bit of a burst occurred. The time difference is only valid if
FMErrCount is 0. The timing difference can be corrected by altering the trigger
delay (B).
Figure 2-17
MEAS SYNC
A
B