Keysight U2761A Mode D'emploi page 35

Features and Functions 2
Function Limitation
If you change to a function where the maximum frequency is less than the current
function, the frequency will be adjusted to the maximum value for the new
function.
For example, if you are currently outputting a 20 MHz sine wave and then change
to the Ramp function, the U2761A will automatically adjusts the output frequency
to 200 kHz (the upper limit for Ramp).
Amplitude Limitation
If you change to a function where the maximum amplitude is less than the current
function, the amplitude will automatically be adjusted to the maximum value for
the new function. This may occur when the output units are Vrms or dBm due to
the differences in crest factor for the various output functions.
For example, if you output a 2.5 Vrms Square wave (into 50 ) and then change to
the Sine wave function, the U2761A will automatically be adjusted the output
amplitude to 1.768 Vrms (the upper limit for Sine wave in Vrms).
Keysight U2761A User's Guide 35