BNC 645 - Manual (Page 145)

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of range” error is generated and the duty cycle and edge time will be restricted
as below:
Duty cycle ≧ 100 x (1.6x Edge time)/Period
And
Duty cycle ≤100 x (1 – (1.6x Edge time)/Period)
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Among the pulse width and pulse duty cycle, the FUNC:PULS:HOLD
command determines which of them is to be held and it affects this
function when the waveform generator adjusts the period.
FUNCtion:PULSe:DCYCle? [MINimum|MAXimum]
Query the pulse duty cycle. The duty cycle in percent will be returned.
FUNCtion:PULSe:TRANsition {<seconds> MINimum|MAXimum }
Specify the edge time in seconds for both the rising and the falling edges.
The edge time represents the time from the 10% threshold to 90% threshold of
each edge. The range for edge time is from 5 ns to 100 ns, and the default is 5
ns. The minimum value is 5 ns and the maximum value is 100 ns.
z
The specified edge time must fit in within the specified pulse width as
shown below. The waveform generator will adjust the edge time if
necessary to accommodate the specified pulse width or duty cycle.
Edge time ≤ 0.625 x Pulse width
Or
Edge time ≤ 0.625 x Period x Duty cycle/100
FUNCtion:PULSe:TRANsition? [MINimum|MAXimum]
Query the edge time. The edge time in seconds is returned.
FUNCtion:RAMP:SYMMetry {<percent>︱ MINimum|MAXimum }
Specify the symmetry percentage for ramp waves. Symmetry represents the
amount of time per cycle that the ramp wave is rising (supposing the waveform
polarity is not inverted). The range is from 0% to 100% and the default is 100%.
z
The APPLY command overrides the current symmetry setting and used
100% symmetry.
z
The specified symmetry is remembered and will be used when you change
the function and then come back to ramp waves.