OWON Oscilloscopes

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 Post subject: Some tests with FFT
PostPosted: Sun May 20, 2012 12:54 pm 
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Joined: Wed May 16, 2012 7:54 am
Posts: 187
Owon SDS7102 version 2.5.1

First 3 pictures directly from signal generator using 50ohm connection with terminal. Then next pictures with probe.
First full signal sine, then FFT and then signal level dropped 60dB

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Tests with Owon probe using BNC probe adapter.

Probe setting is 10:1 and oscilloscope also 10x
(so 200mV/div is 20mV/div in scope input and 50mV/div is 5mV/div in scope input. 5mV is used becouse it is highest sensitivity without BW reject.)

first FFT is 0-500MHz sweep and after sweep signal generator output 60MHz (you see also harmonics)

My opinion is that noise level and dynamic range and also BW is good (surprice good) as we talk about low price 100MHz oscilloscope.

200mV/div full level sine
FFT signal first full level (1)
Then with average 16
Then without average signal dropped 60dB

50mV/div full level sine
FFT signal is also full level but then dropped only 50dB
(of course 50mV/div (5mV/div) noise level is more.)

(1) only this picture have average used.
But FFT pictures infinite prsistence for fully detect noise peak level over range.

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