Hioki 8841 - Setting the Frequency Range

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8.3 STATUS1 Settings (FFT)
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8.3.3 Setting the Frequency Range
Function
display
Meaning
:
Move the cursor up in the selection window.
:
Move the cursor down in the selection window.
NOTE
Frequency range
[Hz]
Frequency
resolution*
3
[Hz]
Window width*
4
Time axis
[/DIV]
400 k*
1
1k 1ms 100
μ
s
200 k*
1
500 2ms 200
μ
s
80 k*
1
200 5ms 500
μ
s
40 k 100 10 ms 1ms
20 k 50 20 ms 2ms
8k 20 50 ms 5ms
4k 10 100 ms 10 ms
2k 5 200 ms 20 ms
800 2 500 ms 50 ms
400 1 1s 100 ms
200 500 m 2s 200 ms
80 200 m 5s 500 ms
40 100 m 10 s 1s
20 50 m 20 s 2s
8*
2
20 m 50 s 5s
4*
2
10 m 100 s 10 s
1.33 *
2
3.33 m 5 min 30 s
667 m*
2
1.67 m 10 min 1 min
333 m*
2
0.83 m 20 min 2 min
133 m*
2
0.33 m 50 min 5 min
The frequency range (frequency axis maximum value) can be set as follows.
The frequency range corresponds to the time axis range (TIME/DIV) setting
of the memory function.
Screen: STATUS1, Waveform display
Procedure
1. Use the Menu keys to display the desired screen.
2. Move the flashing cursor to the frequency range item.
3. Use the function key to make the selection.
・The antialiasing filter (8938) cutoff frequency is the same as the selected
frequency range.
・When "EXT." was selected, octave analysis cannot be carried out.
・To use external sampling, see Section 17.1.4.
Frequency Range, Frequency Resolution, Window Width, Corresponding
Time Axis Range (when the number of FFT points is 1000)
The cutoff frequency of the antialiasing filter is the same as the selected
frequency range, except for the cases listed below.
*1: Antialiasing filter is OFF.
*2: Cutoff frequency is 20 Hz.
*3: FFT Number of Points values of 2000, 5000 and 10,000 correspond to
multiples of 1/2, 1/5 and 1/10, respectively.
*4: FFT Number of Points values of 2000, 5000 and 10,000 correspond to
multiples of 2, 5 and 10, respectively.