For reference only.
9a.2 Output voltage level (on Ch0, or S11) at 50 Ohms load.
Further on the page are only oscillograms of signal levels at different frequencies with LaCroy stat "ON" (50Ohms).
~50kHz :
1MHz :
10MHz :
100MHz :
500MHz :
899MHz :
1GHz :
Additionally, for a note: