7-3
7
IM 701830-01E
Acquisition and Display
7.2 Acquisition Mode
Important information about the averaging mode
• Averaging mode is useful when working with repetitive waveforms.
• Correct averaging is not possible if the waveform has imperfect triggering, since
synchronization will be poor and the displayed waveform will be distorted. When working
with this type of signal, set the trigger mode to Normal, so that the waveform display is
updated only when the trigger occurs. (See page 6.1.)
• Roll mode display is disabled during averaging.
• For linear averaging, the waveform is acquired in normal mode regardless of the trigger
mode setting. If no trigger occurs, the linear average waveform is not displayed.
• If you stop waveform acquisition by pressing the
START/STOP
key, the averaging process
also stops. Averaging restarts from the beginning when acquisition resumes.
• Single start and log start (see page 4-6) cannot be used in averaging mode.
• If you are using simple averaging, the instrument terminates acquisition automatically when
it completes the specified number of acquisitions (as set by the acquisition count).
• Averaging cannot be done on a channel that has the logic input module installed.
Operating Procedure
Set the acquisition mode
1.
Press the
ACQ
key.
2.
Press the “
Acq Mode
” soft key as necessary to select the mode. Some modes are not
available with certain record lengths and sampling rates.
Set the acquisition count
3.
Press the “
Count
” soft key, so that the jog shuttle action is set to “
Count
.”
4.
Set the count by turning the jog shuttle. You can use the arrow keys to move to different
columns within the value. You can set the value to Infinite by pressing the
RESET
key.
If you have set the mode to Average and the count to Infinite, you must now proceed to set
the weight, as described below.
Set the weight (Only if mode is Average and count is Infinite.)
5.
Press the “
Weight
” soft key, so that the jog shuttle action is set to “
Weight
.”
6.
Turn the jog shuttle to set the value.
