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| Zero span spectrum analyzer .FFT, sweep, filters and RBW. |
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| G0HZU:
I'm a bit confused by some of the things you are saying about zero span mode. It might be worth it for you to read Keysight's classic AN-150 application note as this will explain the pros and cons of FFT vs swept modes. I've never used the Siglent analysers, but I would be surprised if they offer a 1Hz digital RBW. This requires a very stable frequency reference and a very good LO synthesiser to make it worthwhile when in zero span mode. Lower cost analysers are going to be limited to maybe a 10Hz digital RBW when the analyser is used in swept or zero span mode. However, I'm not convinced you actually need a 1Hz digital RBW for zero span mode unless you are doing some fairly critical analysis of a slowly changing signal. Usually, 10Hz is adequate. |
| tautech:
--- Quote from: G0HZU on August 06, 2024, 10:19:10 pm ---I'm a bit confused by some of the things you are saying about zero span mode. It might be worth it for you to read Keysight's classic AN-150 application note as this will explain the pros and cons of FFT vs swept modes. I've never used the Siglent analysers, but I would be surprised if they offer a 1Hz digital RBW. This requires a very stable frequency reference and a very good LO synthesiser to make it worthwhile when in zero span mode. Lower cost analysers are going to be limited to maybe a 10Hz digital RBW when the analyser is used in swept or zero span mode. However, I'm not convinced you actually need a 1Hz digital RBW for zero span mode unless you are doing some fairly critical analysis of a slowly changing signal. Usually, 10Hz is adequate. --- End quote --- ::) https://int.siglent.com/u_file/download/24_07_10/SSA3000X%20Plus_DataSheet_E04G.pdf |
| G0HZU:
--- Quote from: tautech on August 06, 2024, 10:23:30 pm --- --- Quote from: G0HZU on August 06, 2024, 10:19:10 pm ---I'm a bit confused by some of the things you are saying about zero span mode. It might be worth it for you to read Keysight's classic AN-150 application note as this will explain the pros and cons of FFT vs swept modes. I've never used the Siglent analysers, but I would be surprised if they offer a 1Hz digital RBW. This requires a very stable frequency reference and a very good LO synthesiser to make it worthwhile when in zero span mode. Lower cost analysers are going to be limited to maybe a 10Hz digital RBW when the analyser is used in swept or zero span mode. However, I'm not convinced you actually need a 1Hz digital RBW for zero span mode unless you are doing some fairly critical analysis of a slowly changing signal. Usually, 10Hz is adequate. --- End quote --- ::) https://int.siglent.com/u_file/download/24_07_10/SSA3000X%20Plus_DataSheet_E04G.pdf --- End quote --- I know that the Siglent can offer 1Hz RBW in FFT mode, but can it also offer it as a digital RBW in zero span? |
| tautech:
--- Quote from: G0HZU on August 06, 2024, 10:35:14 pm --- --- Quote from: tautech on August 06, 2024, 10:23:30 pm --- --- Quote from: G0HZU on August 06, 2024, 10:19:10 pm ---I'm a bit confused by some of the things you are saying about zero span mode. It might be worth it for you to read Keysight's classic AN-150 application note as this will explain the pros and cons of FFT vs swept modes. I've never used the Siglent analysers, but I would be surprised if they offer a 1Hz digital RBW. This requires a very stable frequency reference and a very good LO synthesiser to make it worthwhile when in zero span mode. Lower cost analysers are going to be limited to maybe a 10Hz digital RBW when the analyser is used in swept or zero span mode. However, I'm not convinced you actually need a 1Hz digital RBW for zero span mode unless you are doing some fairly critical analysis of a slowly changing signal. Usually, 10Hz is adequate. --- End quote --- ::) https://int.siglent.com/u_file/download/24_07_10/SSA3000X%20Plus_DataSheet_E04G.pdf --- End quote --- I know that the Siglent can offer 1Hz RBW in FFT mode, but can it also offer it as a digital RBW in zero span? --- End quote --- No just checked, 1 Hz RBW is only available down to a 100 Hz Span. Zero Span provides 30 Hz RBW. See screenshots. |
| coppercone2:
get a older unit if you don't want spam, the new oscilloscopes and whatnot will always be bringing up some pop up advertisement about features, complaining about the RTC, etc |
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