NF WF1943B, Instruction Manual

Page: 99 / 156

4.6 Output waveforms for sweeping and modulation
WF1943B
4-51
Since the squarewaves (fixed duty) and squarewaves (variable duty) are generated differently
from other waveforms, extra pulses are produced.
Similarly, extra pulses are also produced by phase modulation, duty sweep, and PWM.
Update interval 100 to 252
µ
s
If the sweep function (FUNCTION)
is triangular and the change rate of
phase is large
Output waveform
Extra pulses are produced
The occurrence frequency when the sweep function is
, , or is roughly given by the
following formula:
If, for example, the frequency is 1 kHz, the phase span is 90 degrees, and the sweep time is 100 ms, an extra
pulse is generated every 400 cycles on average.
Occurrence frequency [%]=
×
100
360
×
oscillation frequency [Hz]
×
sweep time [s]
phase span [deg]