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116 Agilent E1441A SCPI Command Reference
Chapter 3
selected output termination; Vpp is the output amplitude in volts
peak-to-peak.) A -221, “Settings conflict” error is generated and the offset is
adjusted.
• DC Offset and Output Termination: The offset voltage is automatically
adjusted (and no error is generated) if you change the output termination. For
example, if you set the offset to 100 mVdc and then change the termination
from 50 ohms to “high impedance”, the offset will double to 200 mVdc. If you
change from “high impedance” to 50 ohms, the offset will drop in half. See the
OUTP:LOAD command for more information.
• For dc volts, the output level is actually controlled by setting the offset voltage.
You can set the dc voltage to any value between ±5 Vdc into 50 ohms or
±10 Vdc into an open circuit.
VOLTage:OFFSet?
[SOURce:]VOLTage:OFFSet? [MIN|MAX] queries the dc offset voltage for the
currently selected function. Returns a value in dc volts.
VOLTage:UNIT
[SOURce:]VOLTage:UNIT VPP|VRMS|DBM|DEF selects the output units for
amplitude only (does not affect offset). The default is VPP. [ Stored in volatile
memory ]
VOLTage:UNIT?
[SOURce:]VOLTage:UNIT? queries the units selected. Returns “VPP”, “VRMS”,
or “
DBM”.
V
offset
V
pp
2
--------
+ V
max
≤ and V
offset
2V
pp
≤