Circuit diagram of an oscilloscope with 50 ohm load impedance

I was told some oscilloscopes have 50 ohm impedance settings for radio frequency measurements for impedance matching (as opposed to one 1M ohm resistor and a 10pF capacitor in parallel for load impedance, which is good for low frequency measurements). I was able to find a circuit schematic of an oscilloscope. for the usual 1M ohm and 10pF capacitor in parallel. But i haven't been able to find a circuit diagram for the 50 ohm impedance oscilloscope. Id lile to know what the oscilloscope circuit looks like for the rf 50ohm impedance settings