Keysight 33210A, Руководство пользователя

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187
Chapter 4 Remote Interface Reference
Pulse Configuration Commands
4
FUNCtion:PULSe:DCYCle {<
percent
>| MINimum | MAXimum }
FUNCtion:PULSe:DCYCle? [ MINimum | MAXimum ]
Set the pulse duty cycle in percent. The the pulse duty cycle is defined as:
Duty Cycle = 100 X Pulse Width ÷ Period
where the pulse width represents the time from the 50% threshold of the
rising edge of the pulse to the 50% threshold of the next falling edge.
The pulse duty cycle range is 0 percent to 100 percent. However, the
pulse duty cycle is limited by minimum pulse width and edge time
restrictions, which prevent you from setting exactly 0 percent or 100
percent. For example, for a 1 kHz pulse waveform, you are typically
restricted to pulse duty cycles in the range 0.002 percent to 99.998
percent, limited by the minimum pulse width of 40 ns.
The default pulse duty cycle is 10 percent. MIN is approximately 0%.
MAX is approximately 100%. The
:DCYC?
query returns the pulse duty
cycle in percent. The width and edge restrictions are described below:
• The specified pulse duty cycle must conform to the following
restrictions determined by the minimum pulse width (Wmin). The
function generator will adjust the pulse duty cycle as needed to
accommodate the specified period. From the remote interface, a “Data
out of range” error will be generated and the duty cycle will
be adjusted as described.
Duty Cycle > 100 X Wmin ÷ Period
and
Duty Cycle < 100 X (1 – 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.
33210A users guide.book Page 187 Wednesday, July 16, 2008 11:16 AM