Keysight Technologies 33210A User Manual page 353

As shown below, the 33210A has a fixed series output impedance of 50Ω, forming
a voltage divider with the load resistance.
As a convenience, you can specify the load impedance as seen by the function
generator and thereby display the correct load voltage. If the actual load
impedance is different than the value specified, the displayed amplitude, offset,
and high/low levels will be incorrect. Variations in source resistance are measured
and taken into account during an instrument calibration. Therefore, the accuracy
of the load voltage depends primarily on the accuracy of the load resistance as
shown below.
Δ V
Keysight 33210A User's Guide
Keysight 33210A
50W
V
GEN
50
≅
(%) - - - - - - - - - - - - - - × Δ R
L
R + 50
L
R V
L L
(%)
L
Tutorial 7
353