Measurement Computing eZ-PostView rev.2.0 - Manual (Page 83)

eZ-Analyst 969795 Edit Menu 4-5
Effects of Changing Analysis Frequency, Blocksize, or Nyquist Factor
The effects indicated by the these two tables pertain to changing the Analysis Frequency while
the Blocksize and Nyquist Factor remain unchanged, and visa versa. If the Analysis
Frequency, Blocksize, and/or Nyquist Factor are changed [for the same acquisition], then the
effect on the other variables can differ, depending on the magnitude and direction of change
of those variables.
Analysis Frequency or Nyquist Factor
Change
Direction File Size
(Recorded
Data) Block
Acquisition-
Time* Data Displayed in
Scope Mode Frequency
Resolution
Increase Larger
disk file Faster Faster screen
updates Lower (higher Delta X)
Decrease Smaller
disk file Slower Slower screen
updates Higher (lower Delta X)
Blocksize
Change
Direction File Size
(Recorded
Data) Block
Acquisition-
Time* Data Displayed in
Scope Mode Frequency
Resolution
Increase Larger
disk file
Slower Slower screen
updates
Higher (lower Delta X)
Decrease Smaller
disk file
Faster Faster screen
updates
Lower (higher Delta X)
*Block Acquisition-Time: The time it takes to acquire one block of data .
Edit Menu > Configuration > Analyzer Tab: Filters Panel
The Filters Panel applies to both ZonicBook/618E and WBK18 channels. Filter Panel
functionality does not apply to WaveBook direct channels or to ZonicBook Medallion.
Filters Panel
Apply Low Pass Filter: When selected, a low pass filter provides alias protection and
removes undesired frequencies from the measured response for each associated channel.
AC Coupling (High Pass Filter): When AC Coupling is selected in the Input Channels tab,
the associated input signals will pass through a 0.1 Hz or a 1 Hz High Pass Filter, depending
on which radio button is selected.