Tektronix P6131 Specifications, 4P6131 Instruction Manual, Figure 2: Maximum input voltage calculation example, Figure 3: Typical P6131 Xp and Rp versus frequency

Specifications
4P6131 Instruction Manual
@25% Duty Factor
=(1/2 Peak V) RMS
@50% Duty Factor
=(1.414 (Peak V)) RMS
Special case of square wave:
@20% Duty Factor
=[(VPeak)2 (Duty Factor)] 1/2
Example: Maximum Input Voltage
=[(650 V Pk)2 (.20)]1/2= 290V RMS
0V
0V
0V
Figure 2: Maximum input voltage calculation example
RP and XP ()
10M
1M
100K
10K
1M
1000.01 0.1 1 10 100 1000
Frequency (MHz)
Figure 3: Typical P6131 Xp and Rp versus frequency