CDB5471
Figure 6. Data Collection Window (Time Domain)
3.2.3.1. Last Value
3.2.3.4. RMS
The first column is labelled as “Last Value.” The
value in this box represents the value of the very
last instantaneous sample that was taken (for both
channels) in the most recently-completed computa-
tion cycle. If the user’s analog input waveforms are
AC in nature, then this column of results will rarely
have any meaning. But if the user applies a con-
stant DC input signal to any of the analog input
channels, then the Last Value column for that chan-
nel should display an output code that is relatively
constant from one conversion cycle to the next.
The values in this column represent the computed
RMS value over the most recently-completed com-
putation cycle.
3.2.4 Data Collection Window
The Data Collection Window (Figs 6, 8, and 9) al-
lows the user to collect samples sets of data from
CS5471 and analyze them using time domain, FFT,
and histogram plots. The Data Collection Window
is accessible through the Menu option, or by press-
ing F4.
3.2.3.2. Mean
3.2.4.1. Collect Button
The values in this column represent the simple average
of the sample values in the latest computation cycle.
This button will collect data from the CS5471, to be
analyzed in the plot area. See the section on Col-
lecting Data Sets for more information.
3.2.3.3. Std Dev.
The values in this column represent the computed
standard deviation over the set of values in the most
recent computation cycle.
DS480DB1
17
CIRRUS [ CIRRUS LOGIC ]
