Disconnect 50 Ohm terminator of FlexRIO 5774

[Qwaspen]

Is it possible to disconnect the 50 Ohm terminating resistor of the FlexRIO 5774?

[Terry_ALE]

I don't think this is possible.

What's the need behind this?

[Qwaspen]

I want to measure the CAN bus bit pulse length and don’t want the oscilloscope affecting the bus

[Terry_ALE]

I would come up with an isolation circuit between the bus and 5774.

[santo_13]

You can get something like these to convert the 1 Meg impedance to 50-ohm impedance required by the scope,

https://www.montena.com/fileadmin/technology_tests/documents/data_sheets/Data_sheet_IA1M-50_impedanc...

https://www.broadwavetechnologies.com/product/bnc-male-50-ohm-bnc-female-1-m-ohm-impedance-matching-...

This is a good discussion why not to directly connect signals to 50-ohm inputs - https://www.eevblog.com/forum/beginners/can-i-use-a-50ohm-scope-as-1mohm-by-adding-a-series-1mohm-re...

https://blog.teledynelecroy.com/2020/08/how-do-you-choose-whether-to-use-50-ohm.html