Agilent Technologies E1441A user service Valid Function/ Modulation Modes

•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

20 Agilent E1441A Application Information Chapter 2