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20 Agilent E1441A Application Information
Chapter 2
• Output Function
• Output Frequency
• Output Amplitude
• DC Offset Voltage
• Output Units
• Duty Cycle
• Output Termination
• SYNC Signal
• Instrument Storage State
Note The Agilent E1441A functions do not all have the same maximum limit for
frequency and amplitude. Therefore, when changing functions, you can
generate a "Settings conflict" error when the new function's frequency or
amplitude has a maximum value less than the current output setting. The
function generator automatically adjusts to the maximum value of the
function you specify and generates the new output signal.
Output Function The function generator can output five standard waveforms including sine,
square, triangle, ramp, and noise. You can also select one of five predefined
arbitrary waveforms or download your own custom waveforms. You can
internally modulate any of the standard waveforms (including arbitrary)
using
AM, FM, FSK, or burst modulation. Linear or logarithmic frequency
sweeping is available for any of the standard waveforms (except noise) and
arbitrary waveforms. The default function is sine wave.
Possible Conflict with Output Frequency: The output frequency is
automatically adjusted if you select a function whose maximum frequency
is less than that of the currently active function. For example, if you output
a 1 MHz sine wave and then change the function to triangle wave, the
function generator will adjust the output to 100 kHz (the upper limit for
triangle waves). See Table 2-1. A -221, “Settings conflict” error is
generated and the frequency is adjusted.
Possible Conflict with Output Amplitude: 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). See Table 2-4. A -221, “Settings conflict” error is generated and the
amplitude is adjusted.
Valid Function/ Modulation Modes
The following matrix shows which output functions are allowed with each
modulation mode. Each “
X” indicates a valid combination. If you change to
a function that is not allowed with the selected modulation, the modulation
mode is turned off