Agilent Technologies 33220A User Manual page 190

to the minimum (using the VOLTage command) and the offset to zero
(using the VOLTage:OFFSet command) before changing the output
state.
OUTPut:LOAD {<ohms>|INFinity|MINimum|MAXimum}
OUTPut:LOAD? [MINimum|MAXimum]
Select the desired output termination (i.e., the impedance of the load
attached to the output of the Agilent 33220A). The specified value is used
for amplitude, offset, and high/low level settings. You can set the load to
any value from 1Ω to 10 kΩ. MIN selects 1Ω. MAX selects 10 kΩ. INF sets
the output termination to "high impedance" (>10 kΩ) . The default is 50Ω.
The :LOAD? query returns the current load setting in ohms or "9.9E+37"
(for "high impedance").
• The Agilent 33220A 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, offset,
and high/low levels will be incorrect.
• If you change the output termination setting, the displayed output
amplitude, offset, and high/low levels are automatically adjusted
(and 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. See the VOLT:UNIT command on
page 191 for more information.
Chapter 4 Remote Interface Reference
Output Configuration Commands
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