It's an exam question stated as in the title. I don't know how to analize the problem. As long as it's a BNC to BNC coaxial cable anything goes I think, but I don't know for attenuating probe or active probes.

EDIT I think the question should be intended as "is it a bad practice?"

EDIT2 a second version of the question asks if it can be advantageous in some cases

  • \$\begingroup\$ It can be used , if you understand the impedance of the probe. 1:1 probes are suitable to 10MHz but beyond this, ground clip inductance (~10nH/cm) resonates with coax length ( ~ 75 pF/m) and 50 Ohm Source and load affect the results. \$\endgroup\$ – Sunnyskyguy EE75 Jun 24 '18 at 21:16
  • \$\begingroup\$ I think I should ask if it is considered a bad practice \$\endgroup\$ – MatSiv97 Jun 24 '18 at 21:21
  • \$\begingroup\$ It can be used with limitations above. The trick with any improvisation is to understand its complex impedance. A10:1 probe is ok for attenuating via 9M into low level circuits with known impedance. But for textbook waveforms Test Engineers may use better tools. \$\endgroup\$ – Sunnyskyguy EE75 Jun 24 '18 at 21:22
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    \$\begingroup\$ Bad practice: Because one might assume that a 'scope probe is connected to a 'scope, which is high impedance. Low-impedance signals going the "wrong way" can easily destroy a circuit that you think you're measuring. \$\endgroup\$ – glen_geek Jun 24 '18 at 21:31
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    \$\begingroup\$ If it's a 10:1 scope probe, it's liable to lead to disappointment. \$\endgroup\$ – Brian Drummond Jun 25 '18 at 10:31

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