NF WF1946B, Instruction Manual

Page: 133 / 204

4.5 Switching waveforms of synchronous signals (SYNC OUT)
WF1946B
4-67
„
Additional information:
• For and (fixed duty) at frequencies over 100 kHz, if SYNC OUT is set to PHASE, the
output signal becomes a waveform with the analog signals of a sinewave applied to the comparator.
For this reason, the output level (high or low) may be undefined at 0, 180, and 360 degrees (±2
degrees, approximately).
In particular, note that when the oscillation mode is switched during a burst or gated sweep while
oscillation is stopped, the output level may vary or the waveform may become glitch-shaped.
If a precise output level is required while oscillation is stopped, shift the phase setting. For example,
setting the phase at + 90 degrees shifts the output level to the high level while oscillation is stopped.
0
°
180
°
360
°
(=0
°
)
Approximately
±2 degrees
Phase
(ideal value)
SYNC OUT
The shaded sections
represent an undefined
output level.