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Agilent E1441A Application Information 23
Chapter 2
For arbitrary waveforms, the maximum amplitude will be limited if the 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 6.084
Vpp (into 50 ohms).
Possible Conflict with Function Change: The output amplitude is
automatically adjusted if you select a function whose maximum amplitude
is less than that of the currently active function. This conflict may arise when
the output units are Vrms or dBm due to the differences in crest factor for the
output functions. For example, if you output a 5 Vrms square wave (into 50
ohms) and then change the function to sine wave, the function generator will
adjust the output amplitude to 3.535 Vrms (the upper limit for sine waves in
Vrms). A -221, “Settings conflict” error is generated and the amplitude is
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.
Offset Voltage Restrictions: The output amplitude (in Vpp) and the
dc offset voltage must obey the following restrictions. If the specified
amplitude is not valid, the function generator will automatically adjust it to
Table 2-4.
Parameter
Name
Parameter
Type Function
Output
Termination
Minimum
Amplitude
Maximum
Amplitude
Default
Units
amplitude numeric Sine 50Ω 50 mVpp 10 Vpp Vpp
Square 50Ω 50 mVpp 10 Vpp
Triangle 50Ω 50 mVpp 10 Vpp
Ramp 50Ω 50 mVpp 10 Vpp
Noise 50Ω 50 mVpp 10 Vpp
Built-In
Arbs
50Ω 50 mVpp 10 Vpp
amplitude numeric Sine Open Circuit 100 mVpp 20 Vpp Vpp
Square Open Circuit 100 mVpp 20 Vpp
Triangle Open Circuit 100 mVpp 20 Vpp
Ramp Open Circuit 100 mVpp 20 Vpp
Noise Open Circuit 100 mVpp 20 Vpp
Built-In
Arbs
Open Circuit 100 mVpp 20 Vpp