I removed it from channel 4 (no caps and inductors replaced with 0 Ohm resistors )
Well you are way faster than me, nice work. But I don't know if completely removing it is ideal, as you could get aliasing from the front end amp noise? The MSO7000 also has a filter in this location, though Dave's photos don't show it clearly so I can't tell what component values might be.
From my measurements the CLC was something like 1pF -> 47nH -> 1pF? But I did not remove the components to verify yet. This might be around the 300MHz range.
Little hint, not to artificially limit it.
Why they are boosting the ~300M range I'm not sure (10p/4.6R). And the effect of 770p/560R would seem to be near nothing.
Why they are boosting the ~300M range I'm not sure (10p/4.6R). And the effect of 770p/560R would seem to be near nothing.Are you sure that 750p is a capacitance? I thought it is a small inductance, white caps are rare.
ADC input impedance should be ~110 Ohm.
Thanks lujji and stmcore (I didn't tried the patch yet).
Also, the IP address (I set it to manual) cannot remember the changes, and get lost every time I reboot the scope.
Thank you! Regards!
Range Bandwidth (MHz)
1V 605
500mV 610
200mV 620
100mV 630
50mV 580
20mV 590
10mV 590
- There was no difference in bandwidth with 12nH over 15nH, so the limitation does not lie there.
- Using 0R resistors across the inductors gave me no significant improvement over stock (odd).
- Removing the 1pF at the front of the CLC made things either slightly worse or did nothing.
- Adding a MSO7000 style RCL filter at the front end did improve bandwidth up to ~700MHz but at the cost of ~3dB of peaking at 400MHz. Too much IMO.
With 0R resistors caps sould be removed, if you left them this probably explains the result.
Also for lower values of L, should the caps be replaced with new values so impedance of CLC filter is not changed?
I built an appEntry for MSO7000 v00.01.04.00.00 in case anybody needs it.
Yeah that could explain it as I left them in, giving a 2pF load.
I don't have any values less than 1pF, but, I guess I can try some 0402 0.5pF in the future. Didn't even know they were a thing.
this probably means that at 1G there is no noise from frontend, and likely BW limit lies in its configuration bits.
I'm not sure if you are doing all this stuff with a 7000 device.
In that case, we can't do much more "officially" as the FW doesn't have the "5104" model.
There is no 1GHz model of course, but mso5k shares frontend ic with 7k scopes, that is why we have expectations to have at least same bw as on 7k.
Is there a way to restore the oscilloscope that has been stuck in the RIGOL display window due to an operational error? I have backed up the data, and there is a way to tell me. Thank you very much.
Is there a way to restore the oscilloscope that has been stuck in the RIGOL display window due to an operational error? I have backed up the data, and there is a way to tell me. Thank you very much.Try "restoring defaults". Immediately after power on, wait for the power-on lights to go out (for the Single key to stop glowing orange) and press the "Single" key once. Choose the "Restore Defaults" option. Hope it helps.
Is there a way to restore the oscilloscope that has been stuck in the RIGOL display window due to an operational error? I have backed up the data, and there is a way to tell me. Thank you very much.Try "restoring defaults". Immediately after power on, wait for the power-on lights to go out (for the Single key to stop glowing orange) and press the "Single" key once. Choose the "Restore Defaults" option. Hope it helps.You can enter the operation and prompt for recovery failure after the operation.What additional files do I need to add and what folders do I need,Can you tell me? Thank you.