7-5
7
IM 701830-01E
Acquisition and Display
7.4
Box Average Mode
(For High-Speed Isolation/High-Speed Modules)
≡
For a description of this function, refer to page 1-13.
≡
Function
Under normal conditions, the instrument constantly samples the input signal at 10 MS/s,
extracts values according to the T/div setting from the sampled data, and writes to the
acquisition memory.
However, when using the box average function, the sampling data is not extracted. Instead, the
moving average values of a certain number of data points are written to the acquisition memory
as shown in the following figure.
Voltage
Time axis
Time axis
1
2
16
20
a
21
Input signal
(at 500kS/s)
Box Averaging
data
b
• • • • •
36
• • • • •
• • •
Voltage
Number of data points used for the moving average
Sample rate(S/s)
Data point
10 M*
1
5 M
2
2 M First 4 of every 5 samples
1 M
First 8 of every 10 samples
500 k
First 16 of every 20 samples
200 k
First 32 of every 50 samples
100 k
First 64 of every 100 samples
50 k
First 128 of every 200 samples
20 k
First 256 of every 500 samples
10 k or less
First 256 of every (10 M
÷
sample rate) samples
* Operates in the same way as normal mode.
Operating Procedure
1.
Press the
ACQ
key.
2.
Press the “
Acq Mode
” soft as necessary to select BoxAverage.
