Agilent Technologies 33250A User Manual page 157

• Limits Due to Units Selection: In some cases, the amplitude limits
are determined by the output units selected. This may occur when the
units are Vrms or dBm due to the differences in crest factor for the
various output functions. For example, if you output a 5 Vrms square
wave (into 50 ohms) and then change to the sine wave function,
the function generator will automatically adjust the output amplitude
to 3.536 Vrms (the upper limit for sine waves in Vrms). From the
remote interface, a "Settings conflict" error will be generated and the
amplitude will be adjusted as described.
• Arbitrary Waveform Limitations: For arbitrary waveforms, the
maximum amplitude will be limited if the waveform data points do
not span the full range of the output DAC (Digital- to-Analog Converter).
For example, the built-in "Sinc" waveform does not use the full range
of values between ±1 and therefore its maximum amplitude is limited
to 6.087 Vpp (into 50 ohms).
• While changing amplitude, you may notice a momentary disruption
in the output waveform at certain voltages due to switching of the
output attenuators. The amplitude is controlled, however, so the
output voltage will never exceed the current setting while switching
ranges. To prevent this disruption in the output, you can disable the
voltage autoranging feature using the VOLT:RANG:AUTO command
(see page 160 for more information).
• You can also set the amplitude (with an associated offset voltage)
by specifying a high level and low level. For example, if you set the
high level to +2 volts and the low level to -3 volts, the resulting
amplitude is 5 Vpp (with an associated offset voltage of -500 mV).
See the VOLT:HIGH and VOLT:LOW commands on page 159 for more
information.
• To output a dc voltage level, select the dc voltage function using the
FUNC DC command and then set the offset voltage level using the
VOLT:OFFS command. You can set the dc level to any value between
±5 Vdc into 50 ohms or ±10 Vdc into an open circuit.
Chapter 4 Remote Interface Reference
Output Configuration Commands
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