| Electronics > Beginners |
| Mysterious 25 Ghz signal! |
| << < (3/3) |
| radiolistener:
--- Quote from: Mechatrommer on May 14, 2019, 08:28:08 pm ---i guess its sort of sampling scope? what brand and model? so people can study about it. --- End quote --- it's a sort of stroboscopic oscilloscope, but for frequency domain. The same as stroboscopic oscilloscope uses several captures in order to reconstruct waveform with higher equivalent sampling rate, it also uses several captures in order to reconstruct spectrum above first Nyquist zone and to remove images. The device which use that technique is here: http://www.osa103.ru/en/main-page/ This device implements both - stroboscopic oscilloscope with equivalent sample rate up to 10 GHz and combined FFT up to 1 GHz It's analog frontend bandwidth is 400 MHz, but it can work up to 1 GHz with reduced amplitude. |
| David Hess:
--- Quote from: Mechatrommer on May 14, 2019, 04:50:58 pm ---any literature on this? afaik FFT is only for equal time interval samples. or at least rearrange the "random" sampling rate samples into apparently or mimicking equal time interval samples what we know as equivalent sampling rate. --- End quote --- I think the HP 71500A/70820A Microwave Transition Analyzer works that way. It has a 20 MS/s sample rate but 40 GHz bandwidth. |
| Navigation |
| Message Index |
| Previous page |