Agilent Technologies Agilent 33500 Series Operating And Service Manual page 274

10 μs, then a +5 V signal level corresponds to a 10 μs deviation. Lower external signal levels produce less devi-
ation. Negative signal levels produce negative deviation.
[SOURce[1|2]:]PWM:DEViation:DCYCle {< deviation_in_pct >|MINimum|MAXimum}
[SOURce[1|2]:]PWM:DEViation:DCYCle? [{MINimum|MAXimum}]
Sets duty cycle deviation in percent of period. This is the peak variation in duty cycle from the duty cycle of the under-
lying pulse waveform. For example, if duty cycle is 10% and duty cycle deviation is 5%, the duty cycle of the mod-
ulated waveform will vary from 5% to 15%.
Duty cycle in percent of period, from 0 to 99.9; default approximately 1 percent
Set pulse width deviation to 5%:
PWM:DEV:DCYC 5
Duty cycle deviation cannot exceed pulse duty cycle.
l
Duty cycle deviation also limited by minimum pulse width (Wmin):
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Duty Cycle Deviation < Duty Cycle – 100 x Wmin ÷ Period
and
Duty Cycle Deviation < 100 – Duty Cycle – 100 x Wmin ÷ Period
where Wmin = 16 ns.
Duty cycle deviation limited by edge time.
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Duty Cycle Dev < Duty Cycle – (80 x Leading Edge Time) ÷ Period – (80 x Trailing Edge Time) ÷ Period
and
Duty Cycle Dev < 100 – Duty Cycle – (80 x Leading Edge Time) ÷ Period – (80 x Trailing Edge Time) ÷
Period
With PWM:SOURce
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nector. For example, with duty cycle deviation of 5 percent, a +5 V signal level corresponds to 5% deviation, an
additional 5% of period added to the pulse duty cycle. Lower external signal levels produce less deviation, and neg-
ative signal levels reduce the duty cycle.
[SOURce[1|2]:]PWM:INTernal:FREQuency {< frequency >|MAXimum|MINimum}
[SOURce[1|2]:]PWM:INTernal:FREQuency? [{MAXimum|MINimum}]
Selects frequency at which output pulse width shifts through its pulse width deviation. The waveform used as the mod-
ulating source will operate at that frequency, within frequency limits of that waveform.
1 μHz to the maximum allowed for the internal function. Default 10
Hz
Sets frequency at which the output pulse width shifts through its pulse width deviation to 100 Hz:
PWM:INT:FREQ 100
Agilent 33500 Series Operating and Service Guide
Parameter
EXTernal, deviation is controlled by the ±5 V signal level on rear-panel Modulation In con-
Parameter
Typical Return
+5.000000000000000E+00
Typical Return
+1.000000000000000E+02
PWM Subsystem
273