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22 Agilent E1441A Application Information
Chapter 2
For arbitrary waveforms that you create and download to memory,
the maximum frequency depends on the number of points specified in the
waveform. As shown below, the maximum output frequency decreases as
you specify more points in the waveform. The five built-in arbitrary
waveforms can be output at a maximum of 5 MHz.
Possible Conflict with Function Change: 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). A -221, “Settings conflict” error is generated and the
frequency is adjusted.
Possible Conflict with Duty Cycle (square wave only): For output
frequencies above 5 MHz, the duty cycle is limited to values between 40%
and 60% (below 5 MHz, the range is 20% to 80%). The duty cycle is
automatically adjusted if you select a frequency that is not valid with the
present duty cycle. For example, if you set the duty cycle to 70% and then
change the frequency to 8 MHz, the function generator will automatically
adjust the duty cycle to 60% (the upper limit for this frequency). A -221,
“Settings conflict” error is generated and the duty cycle is adjusted.
Use the following command to set the output frequency:
FREQuency <frequency>|MINimum|MAXimum
You can also use the APPLy command to select the function, frequency,
amplitude, and offset with a single command. Because the APPLy command
also changes duty cycle, modulation type, trigger source, and trigger slope,
you must place the APPLy command first in any sequence of configuration
commands.
Output Amplitude As shown below, the output amplitude range depends on the function
currently selected and the output termination. The default amplitude is
100 mVpp (into 50 ohms) for all functions.
Table 2-3.
Number of Arb Points Minimum Frequency Maximum Frequency
8 to 8,192 (8k) 100 mHz 5 MHz
8,193 to 12,287 (12k) 100 mHz 2.5 MHz
12,288 to 16,000 100 mHz 200 kHz