HP 3326A Operating And Reference Manual page 38

The
Entrv
Keys
Duty Cycle (Pulse Width)
The DUTY CYCLE key enables display, entry, or modification of the duty cycle of the
pulse mode channel A waveform. The DUTY CYCLE key is selected by pressing the
blue SHIFT key prior to the FREQ key. The DUTY CYCLE indicator illuminates when
the duty cycle value is displayed. After selection of the DUTY CYCLE key, the duty cycle
iL:
(~~
,~
value is changed with the numeric keypad and
O / O
units key, or modified with the MODIFY
controls. The duty cycle range is from 1
O / O
to 99% of the period with a minimum pulse
width of 20 nanoseconds. The resolution of the duty cycle is 0.01
O/O.
The duty cycle
remains constant for changes in frequency provided the pulse width is greater than
20 nanoseconds. Figure 1-19 illustrates the effect on changes in duty cycle.
HP-IS Example
STEP 1
STEP 2
STEP 3