Agilent Technologies U2761A manual Duty Cycle Square Waves, Limits Due to Frequency

2 Features and Functions

Duty Cycle (Square Waves)

The duty cycle of a Square wave represents the amount of time per cycle that the Square wave is at a high level (assuming that the waveform is not inverted).

20% Duty Cycle 80% Duty Cycle

Figure 2-7Square wave duty cycles

Refer to “Pulse Waveform” on page 45 for the information on the duty cycle for Pulse waveforms.

Duty Cycle

•20% to 80% (frequency ≤ 10 MHz)

•40% to 60% (frequency > 10 MHz)

The duty cycle is stored in volatile memory where the duty cycle is set to default 50% upon power-off or after a remote interface reset.

The duty cycle setting is stored when you change from Square wave to another function. Thus, when you return to the Square function, the previous duty cycle is used.

Limits Due to Frequency

If the Square wave function is selected and you change to a frequency that cannot produce the current duty cycle, the duty cycle is automatically adjusted to the maximum value for the new frequency.

For example, if you currently have the duty cycle set to 70% and then change the frequency to 12 MHz, the U2761A will automatically adjusts the duty cycle to 60% (the upper limit for this frequency).

38 U2761A User’s Guide