ONO SOKKI - FFT analyzer general FAQ -What is the relation of data length, frequency resolution, and display length of TIME waveform?

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<Diagram 1> 16384, 8192, 4096 points

Frequency range	4,096 points/1,600 lines		8,192 points/3,200 lines		16,384 points/6,400 lines		Frequency range
Frequency range	Resolution (Δｆ)	Display length of time waveform	Resolution (Δｆ)	Display length of time waveform	Resolution (Δｆ)	Display length of time waveform	Frequency range
100 kHz	62.5 Hz	16 ms	31.25Hz	32 ms	15.625 Hz	64 ms	100 kHz
50 kHz	31.25 Hz	32 ms	15.625 Hz	64 ms	7.8125 Hz	128 ms	50 kHz
40 kHz	25 Hz	40 ms	12.5 Hz	80 ms	6.25 Hz	160 ms	40 kHz
32 kHz	20 Hz	50 ms	10 Hz	100 ms	5 Hz	200 ms	32 kHz
25 kHz	15.625 Hz	64 ms	7.8125 Hz	128 ms	3.90625 Hz	256 ms	25 kHz
20 kHz	12.5 Hz	80 ms	6.25 Hz	160 ms	3.125 Hz	320 ms	20 kHz
16 kHz	10 Hz	100 ms	5 Hz	200 ms	2.5 Hz	400 ms	16 kHz
10 kHz	6.25 Hz	160 ms	3.125Hz	320 ms	1.5625 Hz	640 ms	10 kHz
8 kHz	5 Hz	200 ms	2.5 Hz	400 ms	1.25 Hz	800 ms	8 kHz
6.4 kHz	4 Hz	250 ms	2 Hz	500 ms	1 Hz	1 s	6.4 kHz
5 kHz	3.125 Hz	320 ms	1.5625 Hz	640 ms	781.25 mHz	1.28 s	5 kHz
4 kHz	2.5 Hz	400 ms	1.25 Hz	800 ms	625 mHz	1.6 s	4 kHz
3.2 kHz	2 Hz	500 ms	1 Hz	1 s	500 mHz	2 s	3.2 kHz
2.5 kHz	1.5625 Hz	640 ms	781.25 mHz	1.28 s	390.625 mHz	2.56 s	2.5 kHz
2 kHz	1.25 Hz	800 ms	625 mHz	1.6 s	312.5 mHz	3.2 s	2 kHz
1.6 kHz	1 Hz	1 s	500 mHz	2 s	250 mHz	4 s	1.6 kHz
1 kHz	625 mHz	1.6 s	156.25 mHz	3.2 s	312.5 mHz	6.4 s	1 kHz
800 Hz	500 mHz	2 s	250 mHz	4 s	125 mHz	8 s	800 Hz
640 Hz	400 mHz	2.5 s	200 mHz	5 s	100 mHz	10 s	640 Hz
500 Hz	312.5 mHz	3.2 s	156.25 mHz	6.4 s	78.125 mHz	12.8 s	500 Hz
400 Hz	250 mHz	4 s	125 mHz	8 s	62.5 mHz	16 s	400 Hz
320 Hz	200 mHz	5 s	100 mHz	10 s	50 mHz	20 s	320 Hz
250 Hz	156.25 mHz	6.4 s	78.125 mHz	12.8 s	39.0625 mHz	25.6 s	250 Hz
200 Hz	125 mHz	8 s	62.5 mHz	16 s	31.25 mHz	32 s	200 Hz
160 Hz	100 mHz	10 s	50 mHz	20 s	25 mHz	40 s	160 Hz
100 Hz	62.5 mHz	16 s	31.25 mHz	32 s	15.625 mHz	64s	100 Hz
80 Hz	50 mHz	20 s	25 mHz	40 s	12.5 mHz	80 s	80 Hz
64 Hz	40 mHz	25 s	20 mHz	50 s	10 mHz	100 s	64Hz
50 Hz	31.25 mHz	32 s	15.625 mHz	64 s	7.8125 mHz	128 s	50 Hz
40 Hz	25 mHz	40 s	12.5 mHz	80 s	6.25 mHz	160 s	40 Hz
32 Hz	20 mHz	50 s	10 mHz	100 s	5 mHz	200 s	32Hz
25 Hz	15.625 mHz	64 s	7.8125 mHz	128s	3.90625 mHz	256s	25Hz
20 Hz	12.5 mHz	80 s	6.25 mHz	160 s	3.125 mHz	320 s	20 Hz
16 Hz	10 mHz	100 s	5 mHz	200 s	2.5 mHz	400 s	16Hz
10 Hz	6.25 mHz	160 s	3.125 mHz	320 s	1.5625 mHz	640 s	10 Hz
8 Hz	5 mHz	200 s	2.5 mHz	400 s	1.25 mHz	800 s	8Hz
6.4 Hz	4 mHz	250 s	2 mHz	500 s	1 mHz	1,000 s	6.4Hz
5 Hz	3.125 mHz	320 s	1.5625 mHz	640 s	781.25 µHz	1,280 s	5Hz
4 Hz	2.5 mHz	400 s	1.25 mHz	800 s	625 µHz	1,600 s	4Hz
3.2 Hz	2 mHz	500 s	1 mHz	1,000 s	500 µHz	2,000 s	3.2Hz
2.5 Hz	1.5625 mHz	640 s	781.25 µHz	1,280 s	390.625 µHz	2,560 s	2.5Hz
2 Hz	1.25 mHz	800 s	625 µHz	1,600 s	312.5 µHz	3,200 s	2Hz
1.6 Hz	1 mHz	1,000 s	500 µHz	2,000 s	250 µHz	4,000 s	1.6Hz
1 Hz	625 µHz	1,600 s	312.5 µHz	3,200 s	156.25 µHz	6,400 s	1Hz
800 mHz	500 µHz	2,000 s	250 µHz	4,000 s	125 µHz	8,000 s	800 mHz
640 mHz	400 µHz	2,500 s	200 µHz	5,000 s	100 µHz	10,000 s	640 mHz
500 mHz	312.5 µHz	3,200 s	156.25 µHz	6,400 s	78.125 µHz	12,800 s	500 mHz
400 mHz	250 µHz	4,000 s	125 µHz	8,000 s	62.5 µHz	16,000 s	400 mHz
320 mHz	200 µHz	5,000 s	100 µHz	10,000 s	50 µHz	20,000 s	320 mHz
250 mHz	156.25 µHz	6,400 s	78.125 µHz	12,800 s	39.0625 µHz	25,600 s	250 mHz
200 mHz	125 µHz	8,000 s	62.5 µHz	16,000 s	31.25 µHz	32,000 s	200 mHz
160 mHz	100 µHz	10,000 s	50 µHz	20,000 s	25 µHz	40,000 s	160 mHz
100 mHz	62.5 µHz	16,000 s	31.25 µHz	32,000 s	15.625 µHz	64,000 s	100 mHz
80 mHz	50 µHz	20,000 s	25 µHz	40,000 s	12.5 µHz	80,000 s	80 mHz
64 mHz	40 µHz	25,000 s	20 µHz	50,000 s	10 µHz	100,000 s	64 mHz
50 mHz	31.25 µHz	32,000 s	15.625 µHz	64,000 s	7.8125 µHz	128,000 s	50 mHz
40 mHz	25 µHz	40,000 s	12.5 µHz	80,000 s	6.25 µHz	160,000 s	40 mHz
32 mHz	20 µHz	50,000 s	10 µHz	100,000 s	5 µHz	200,000 s	32 mHz
25 mHz	15.625 µHz	64,000 s	7.8125 µHz	128,000 s	3.90625 µHz	256,000 s	25 mHz
20 mHz	12.5 µHz	80,000 s	6.25 µHz	160,000 s	3.125 µHz	320,000 s	20 mHz
16 mHz	10 µHz	100,000 s	5 µHz	200,000 s	2.5 µHz	400,000 s	16 mHz
10 mHz	6.25 µHz	160,000 s	3.125 µHz	320,000 s	1.5625 µHz	640,000 s	10 mHz

Revised:2002/06/17

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