Features and Functions 3
Keysight 33210A User’s Guide 103
Duty Cycle Deviation
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.
– Duty cycle deviation: 0 to 100% (see below). The default is 1%.
– 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 × Wmin ÷ Period
and
Duty Cycle Deviation <
100 – Duty Cycle – 100 × Wmin ÷ Period
where:
Wmin = 40 ns for period <
10 s.
Wmin = 200 ns for period > 10 s, but <
100 s.
Wmin = 2 µs for period > 100 s, but <
1000 s.
– The duty cycle deviation is also limited by the current edge time setting.
Duty Cycle Dev <
Duty Cycle – (160 × Edge Time) ÷ Period
and
Duty Cycle Dev <
100 – Duty Cycle – (160 × Edge Time) ÷ Period
– Front-Panel Operation: After enabling PWM, press the Dty CyC Dev softkey.
Then use the knob or numeric keypad to enter the desired deviation.
– Remote Interface Operation:
PWM:DEViation:DCYCle {< deviation in percent>|MIN|MAX}
The pulse width and width deviation, and the pulse duty cycle and duty cycle
deviation are coupled in the front panel interface. If you select Wid th for the
pulse waveform and enable PWM, the Wid th Dev softkey is available. On the
other hand, if you select Dty Cyc for the pulse waveform and enable PWM, the
Dty Cyc Dev softkey is available.
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