NF WAVE FACTORY WF1967, Instruction Manual (Operations

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4.4 Setting for Main Items
WF1967/WF1968
4-48
f) Definition and restriction of pulse width, leading time and trailing time
The definitions of pulse width, leading time and trailing time are shown in the following figure.
However, the setting range is restricted mutually as for pulse width, leading time, trailing time,
and frequency as shown below.
If the following restriction is not filled by setting the frequency or the pulse width, the leading
and trailing times are first adjusted, and then the pulse width is adjusted.

Limitations on leading /trailing time
The leading time, trailing time and the frequency or the period are limited within the following
ranges.
For example, the leading time and the trailing time are limited to 10ns or longer at 100Hz.
Furthermore, the actual leading /trailing times which are output in the 20Vp-p range will be a
maximum of 0.4ns later compared to other ranges even if the settings are the same.

Restriction of pulse width, leading time and trailing time
The pulse width time, leading time, trailing time and the frequency or the period are limited as
follow. When the pulse width is set with duty, the value converted into time shall be the pulse
width time.
For example, if the leading time and trailing time are set to every 100ns at 1kHz, the pulse width
time can vary between a range of 169.3ns to 999.83μs.
The larger of 1ppm of period or 4.21ns
≦
Leading time
The larger of 1ppm of period or 4.21ns
≦
Trailing time
× k
≦
Pulse width time
≦
Period
－
× k
However,
) 8 . 0 arcsin( 4
π
=
k ≒
0.847
Pulse width
Rising time Falling time
Cycle
Leading time +
Trailing time
Leading time +
Trailing time