HP 33120A, User Manual

Page: 15 / 118

To set the duty cycle
Applies only to square waves. At power-on, the duty cycle for square
waves is 50%. You can adjust the duty cycle for a square waveform from
20% to 80%, in increments of 1% (for frequencies above 5 MHz, the
range is 40% to 60%).
The following steps show you how to change the
duty cycle to 45%.
1 Select the square wave function.
Notice that the annunciator turns on, indicating that the
square wave function is enabled.
2 Enable the duty cycle modify mode.
The displayed duty cycle is either the power-on value or the previous
value selected.
50 % DUTY
This message appears on the display for approximately 10 seconds.
Repeat this step as needed.
3 Enter the desired duty cycle.
1
Notice that the
Num
annunciator turns on and “
ENTER NUM
” flashes on
the display, indicating that the number mode is enabled.
45
To cancel the number mode, press
Shift Cancel
.
4 Output the waveform with the displayed duty cycle.
45 % DUTY
% Duty Shift
Enter Number
4
5
Enter
1
You can also use the knob and arrow keys to enter a number.
See “Front-Panel Number Entry” on page 3 for more information.
Chapter 1 Quick Start
To set the duty cycle
22