The P5205 can connect directly a oscilloscope that feature a TekProbe interface. You can also use scopes that feature the TekVPI interface by using a TPA-BNC adapter.
If you would like to use a third party oscilloscope, or one that features a standard BNC interface use the 1103 Probe Power supply. Though this will require you to manually set the attenuation on the scope.
TPA-BNC adapter:
https://www.tek.com/en/sitewide-content/datasheets/t/p/a/tpa-bnc
1103 Power Supply:
https://www.tek.com/en/datasheet/probe-power-supply-1103
