Keysight 81160A - Duty Cycle Deviation

Features and Functions
81150A and 81160A User’s Guide 221
3.11.7 Duty Cycle Deviation
Introduction
The duty cycle deviation represents the variation in duty cycle of the
modulated waveform from the duty cycle of the pulse waveform. The duty
cycle deviation is expressed as a percentage of the period.
Characteristics
 Duty cycle deviation: 0 to 100% (see below). The default is 50m%.
 The duty cycle deviation cannot exceed the current pulse duty cycle.
 The duty cycle deviation is also limited by the minimum pulse width
(Wmin):
Duty Cycle Deviation  Duty Cycle  100 x Wmin ÷ Period
and
Duty Cycle Deviation  100  Duty Cycle  100 x Wmin ÷ Period
81150A: Where Wmin is either 4.1 ns or 10 ns depending on the
selected amplifier (See section Amplifier Type Selection).
81160A: Where Wmin is 1.5 ns.
 The duty cycle deviation is also limited by the current edge time
setting.
Duty Cycle Dev ≤ Duty Cycle - (80 x (Lead Edge Time + Trail Edge
Time))÷Period
and
Duty Cycle Dev ≤ 100 - Duty Cycle - (80 x (Lead Edge Time + Trail Edge
Time)) ÷Period