3 Features and Functions
76 Keysight 33210A User’s Guide
Output Termination
Applies to output amplitude and offset voltage only. The Keysight 33210A has a
fixed series output impedance of 50 ohms to the front-panel Output connector. If
the actual load impedance is different than the value specified, the displayed
amplitude and offset levels will be incorrect.
– Output termination: 1Ω to 10 kΩ, or Infinite. The default is 50Ω. The message
line at the top of the display calls attention to output termination settings
other than 50Ω.
– The output termination setting is stored in non-volatile memory and does not
change when power has been off or after a remote interface reset (assuming
the Power On state is set to “default”).
– If you specify a 50-ohm termination but are actually terminating into an open
circuit, the actual output will be twice the value specified. For example, if you
set the offset to 100 mVdc (and specify a 50-ohm load) but are terminating the
output into an open circuit, the actual offset will be 200 mVdc.
– If you change the output termination setting, the displayed output amplitude
and offset levels are automatically adjusted (no error will be generated). For
example, if you set the amplitude to 10 Vpp and then change the output
termination from 50 ohms to “high impedance”, the amplitude displayed on
the function generator’s
front-panel will
double
to 20 Vpp. If you change from
“high impedance”
to 50 ohms, the displayed amplitude will drop in half.
– You cannot specify the output amplitude in dBm if the output termination is
currently set to “high impedance”. The units are automatically converted to
Vpp.
– Front-Panel Operation: Press and select the Output Setup softkey. Then
use the knob or numeric keypad to select the desired load impedance or press
the Load softkey again to choose “High Z”.
– Remote Interface Operation:
OUTPut:LOAD {<ohms>|INFinity|MINimum|MAXimum}
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