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4.
BASIC OPERATION
IM FG410-01EN
■
When [Sync] is selected
A TTL level signal that rises at the reference phase of the waveform is output from the sync/
sub-output terminal.
■
When [BrstSync] is selected
A TTL level signal synchronized with the burst oscillation is output from the sync/sub-
output terminal. As shown in the following figure, this signal is low during oscillation and
high during oscillation stop.
When the signal during burst is observed with an oscilloscope, it can be used as the trigger
signal for the oscilloscope.
i) Usage of stop level
The level when oscillation is stopped is normally set with the oscillation start/stop phase,
but it can also be set independently from that with a proportion of the amplitude full scale.
Set [StpLvl] (stop level) on the 2nd page of the setting screen to [On] (on) and set the level
with a % value.
The following examples are for mark wave number = 3, oscillation start/stop phase = 30°,
stop level = off, and
−
50% when on. Note that the oscillation start/stop phase remains valid.
When the stop level is applied to a square waveform, a 3-value square waveform can be
output, as shown in the following figure. In the example presented in this figure, the stop
level is set to 0%, and the oscillation start/stop phase to 0°. (Either the normal or extended
variable duty range may be used.) If the stop level is not applied, the level of the square
waveform during oscillation stop is either to low level or high level.
Oscillation
Stop
Oscillation
Stop
Burst sync signal
Output signal
Stop level off
Stop level on
Oscillation start/stop phase: 30°
Oscillation start/stop phase: 30°
Stop level: –50%
