NF WF1945B - Page 116

4.3 Modulation
4-54 WF1945B
(4) Select modulation waveform (FUNCTION)
① Use the
and keys to produce the following display (FUNCTION flashes).
ＳＩＮ
ＰＷＭ：ＴＹＰＥ ＤＥＶＩＡＴＩＯＮ ＦＲＥＱ ＦＵＮＣＴＩＯＮ
② Press the
ENTER
key, then use the and keys to produce the following display (SIN
flashes).
ＳＩＮ
ＰＷＭ：ＴＹＰＥ ＤＥＶＩＡＴＩＯＮ ＦＲＥＱ ＦＵＮＣＴＩＯＮ
③ After selecting, press the
EXIT
key to release the setting mode.
The above completes pulse width modulation setting.
Other operations:
• When the oscillation mode is changed to modulation (MODU), modulation occurs at the setting at that
time point.
• To stop modulation : Press the
STOP
key. Resume modulation by pressing the
START
key.
• Duty setting vs. maximum or minimum duties
: Max. duty = Duty setting + (pulse width deviation [%]
÷ 2)
Min. duty = Duty setting
− (pulse width deviation [%] ÷ 2)
• During sweep, multiple pulses may be produced within 1 period output as indicated in the figure.
• Setting items at pulse width modulation (MODU menu)
TYPE: PWM
DEVIATION (pulse width deviation) [%]
FREQ (modulation frequency) [Hz]
FUNCTION (modulation waveform) [SIN,
, , , ]