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Agilent E1441A SCPI Command Reference 99
Chapter 3
automatically adjusted.
• Output Amplitude and Output Termination: The output amplitude is
automatically adjusted (and no error is generated) if you change the output
termination. For example, if you set the amplitude to 10 Vpp and then change
the termination from 50 ohms to “high impedance”, the displayed amplitude
will double to 20 Vpp. If you change from “high impedance” to 50 ohms, the
displayed amplitude will drop in half. See “Output Termination” on
page 25. for more information.
• A momentary glitch occurs in the output waveform at certain voltages due to
output attenuator switching. This positive-going glitch occurs when the output
voltage crosses the break-point voltage either from a lower voltage or a higher
voltage. The voltages are shown below (inVpp) for a 0 volt dc offset:
.252, .399, .502, .796, 1, 1.59, 2.0, 3.17, 3.99, 6.32, 7.96
• The output voltage will momentarily drop to 0 volts at certain voltages due to
output relay switching. This occurs when the output voltage crosses the
break-point voltage either from a lower voltage or a higher voltage. The
voltages are shown below (in Vpp) for a 0 volt dc offset: .317, .632, 1.26, 2.52,
5.02
For the offset parameter of the APPLy command, you can substitute “
MINimum”,
“
MAXimum”, or “DEFault” in place of a specific value for the parameter. MIN selects
the smallest dc offset voltage for the selected function (0 volts).
MAX selects the
largest offset for the selected function. The default offset voltage is 0 volts for all
functions.
• You can set the offset to a positive or negative number with the restrictions
shown below. If the specified offset voltage is not valid, the function generator
will automatically adjust it to the maximum dc voltage allowed with the
present amplitude. (Vmax is the maximum peak-to-peak amplitude for the
selected output termination; Vpp is the output amplitude in volts
peak-to-peak.) A -221, “Settings conflict” error is generated and the offset is
automatically 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 displayed offset will double to
200 mVdc. If you change from “high impedance” to 50 ohms, the displayed
offset will drop in half.
• 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.
V
offset
V
pp
2
--------
+ V
max
≤ and V
offset
2V
pp
≤