Keithley 3930A Operator's Manual page 47

SECTION 3
Operation
Square wave with Duty Square wave with
cycle fixed at 50%
variable Duty cycle
T
I
l
j---r--
I
@-----A
I
I
I
(Shaded area is the hysteresis region
which changes to high or low depending
on the phase past value.)
Ascending saWtooth wave
Descending sawtooth wave
?gure 3-13.
Waveforms and Phase Definitions
3-28