GW Instek AFG-2225 User Manual - Manual (Page 209)

REMOTE INTERFACE
209
SOURce[1|2]:AMPlitude
Source Specific
Command
Description The SOURce[1|2]:AMPLitude command sets the
output amplitude for the selected channel. The
query command returns the current amplitude
settings.
Note The maximum and minimum amplitude depends
on the output termination. The default amplitude
for all functions is 100 mVpp (50Ω). If the
amplitude has been set and the output termination
is changed from 50Ω to high impedance, the
amplitude will double. Changing the output
termination from high impedance to 50Ω will half
the amplitude.
The offset and amplitude are related by the
following equation.
|Voffset| < Vmax – Vpp/2
If the output termination is set to high impedance,
dBm units cannot be used. The units will default to
Vpp.
The output amplitude can be affected by the
function and unit chosen. Vpp and Vrms or dBm
values may have different maximum values due to
differences such as crest factor. For example, a
5Vrms square wave must be adjusted to 3.536
Vrms for a sine wave.
The amplitude units can be explicitly used each
time the SOURce[1|2]:AMPlitude command is
used. Alternatively, the VOLT:UNIT command can
be used to set the amplitude units for all
commands.