| Products > Test Equipment |
| New Rigol DS7000 |
| << < (50/72) > >> |
| Sighound36:
Indeed but using the 0.45 formula would give a a greater bandwidth in retrospective so in essence stretching things a bit I feel! You can also use a know signal frequency and amplitude as benchmark and work you work up the frequencies until you reach the point of -3db roll off this you can compare to the rise times to check you are getting for a correlation between the two methods. If you like (Siglent appreciation society founding member) I am happy to work both methods on our Wavepro 254 for you later if you wish. The 7000 is with one of my colleagues this week, however I can also perform the same tests on the MSO8000 ? |
| nctnico:
--- Quote from: Sighound36 on February 21, 2020, 05:25:57 pm ---Indeed but using the 0.45 formula would give a a greater bandwidth in retrospective so in essence stretching things a bit I feel! --- End quote --- No. Bandwidth is bandwidth. --- Quote ---You can also use a know signal frequency and amplitude as benchmark and work you work up the frequencies until you reach the point of -3db roll off this you can compare to the rise times to check you are getting for a correlation between the two methods. --- End quote --- Only testing with an RF generator yields valid results. Using the risetime is nothing more than an educated guess. |
| maginnovision:
Yea, those coefficients are essentially guessing at the filter. That's why you go .45 for >=1GHz because it's likely brickwall. The real test is passband flatness across whatever you consider the bandwidth to be. A Rigol may well see an 870MHz signal but it's definitely not going to be flat or a nice roll off. It'll likely be up and down significantly more than the quoted bandwidth range. |
| fact:
Measured the bandwidth of my MSO7000 with a RF-generator, -3dB frequency at 760MHz for CH1. This was pretty close to the estimated bandwidth of 810MHz using a Bodnar fast rise-time generator. |
| Martin72:
Didn´t really need an rf generator for my works and buying one only for measure once the bandwith would be too expensive. They are some chinese things on the market for a few bucks (appx 120€) - But i think, they´re too crappy, or ? |
| Navigation |
| Message Index |
| Next page |
| Previous page |