NF DF 1906 - Symmetry and Duty Ratio; Set Symmetry (Ramp Wave); Set Duty Ratio (Square Wave)

4.1 Symmetry and Duty Ratio
DF1906
4-2
4.1 Symmetry and Duty Ratio
4.1.1 Set Symmetry (Ramp Wave)
When the ramp wave is selected, the symmetry can be changed. When you press waveform select key
[FUNCTION] once again while the cursor is located in the waveform display, the cursor moves to the
symmetry setting value.
When you turn the [MODIFY] dial in this state, the symmetry setting can be changed.
You can select the digit where the setting is changed by moving the cursor position left and right using
cursor movement keys ([
▲
]/[
▼
] keys).
Setting range: 0% to 100%, resolution: 0.1 %.
When the symmetry is set or changed, oscillation stops while it is being set or changed.
4.1.2 Set Duty Ratio (Square Wave)
When the square wave is selected, the duty ratio can be changed. When you press waveform select key
[FUNCTION] once again while the cursor is located in the waveform display, the cursor moves to the
duty ratio setting value.
When you turn the [MODIFY] dial in this state, the duty ratio setting can be changed.
You can select the digit where the setting is changed by moving the cursor position left and right using
cursor movement keys ([
▲
]/[
▼
] keys).
Setting range: 0% to 100%, resolution: 0.1 %.
0%： Fixed to low level, 100%： Fixed to high level, no pulse.
When the duty ratio is other than 50%, there is a jitter of approx. 150 ns p-p.
Therefore, the pulse may disappear when the frequency is higher than the frequency below.
（68.7 x duty ratio [%]）[k Hz] （at 0% to 50%）
（68.7 x (100-duty ratio）[%]）[kHz] （at 50% to 100%）
(Example: The pulse may disappear at a frequency of 6.87 kHz or more at 0.1% or 99.9%.)
When the duty ratio is set or changed, oscillation stops while it is being set or changed.
Ｆ ５０．０００００００ｋＨｚ Ａ ８．０００Ｖｐ－ｐ Ｏ －１．０００Ｖ
Ｖａｒ ＜ＣＯＮＴ＞ Ｓｙｍｍｅｔｒｙ ４０．０％ ／ＯＰＥＮ ＯＦＦ
Symmetry is displayed/set when waveform is ramp wave
Ｆ ５０．０００００００ｋＨｚ Ａ ８．０００Ｖｐ－ｐ Ｏ －１．０００Ｖ
Ｖａｒ ＜ＣＯＮＴ＞ Ｄｕｔｙ ９９．０％ ／ＯＰＥＮ ＯＦＦ
When waveform is square wave, duty ratio is displayed/set
"
Var " is displayed when
symmetry is other than 50%
"
Var " is displayed when
duty ratio is other than 50%