Products > Test Equipment
Rigol DHO804 Test and Compare Thread
TurboTom:
--- Quote from: Martin72 on December 03, 2023, 11:19:47 pm ---
--- Quote from: TurboTom on December 03, 2023, 07:53:42 pm ---See attached screenshot: UR - FlatTop; LL - Blackman-Harris; LR - von Hann
--- End quote ---
Wait a second...von Hann....2GSa/s....What scopemodel do you have... ;)
--- End quote ---
Of course, it's a DHO1k, but the flattop window is equally broken as on DHO800 / 900 instruments. Moreover, I simply don't call the "Hanning" window function this way since the man behind this mathematics was the Austrian meteorologist Julius von Hann, so the window function should be correctly called "von Hann" or "Hann" window. Maybe I'm pathetic but IMO we don't need to "americanize" every scientist's name... ;)
gf:
--- Quote from: Martin72 on December 03, 2023, 09:15:56 pm ---Earlier I took the 1khz reference signal as the source and went through all the windows.
--- End quote ---
Looks broken on your Rigol. And not just Flattop, the others look weird, too.
In order to show maximum leakage, don't choose exactly 1kHz, but rather 997.5 Hz in conjunction with your Rigol settings, and 998.97 Hz with your Siglent settings. IOW, us a frequency f = (N+0.5)*delta_f, where N is an integer. Calculate with enough decimal places, i.e. delta_f = 4.76837 and not just 4.77 for your Siglent settings.
Martin72:
This was taken from the calibrate signalsource of the scopes, but yes, I could use my generator for this.
Tomorrow. ;)
2N3055:
--- Quote from: TurboTom on December 03, 2023, 11:38:46 pm ---
--- Quote from: Martin72 on December 03, 2023, 11:19:47 pm ---
--- Quote from: TurboTom on December 03, 2023, 07:53:42 pm ---See attached screenshot: UR - FlatTop; LL - Blackman-Harris; LR - von Hann
--- End quote ---
Wait a second...von Hann....2GSa/s....What scopemodel do you have... ;)
--- End quote ---
Of course, it's a DHO1k, but the flattop window is equally broken as on DHO800 / 900 instruments. Moreover, I simply don't call the "Hanning" window function this way since the man behind this mathematics was the Austrian meteorologist Julius von Hann, so the window function should be correctly called "von Hann" or "Hann" window. Maybe I'm pathetic but IMO we don't need to "americanize" every scientist's name... ;)
--- End quote ---
It's not even "americanizing".. It is just wrong. "Von Hann" or "Hann" is the name.
Mechatrommer:
--- Quote from: TurboTom on December 03, 2023, 11:38:46 pm ---Maybe I'm pathetic but IMO we don't need to "americanize" every scientist's name... ;)
--- End quote ---
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