YOKOGAWA FG420, User Manual

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116 IM FG410-01EN
4. BASIC OPERATION
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.
Oscillation Stop
Burst sync signal
Output signal
Oscillation Stop
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.
Stop level off
Stop level on
Oscillation start/stop phase 30°
Stop level: –50%
Oscillation start/stop phase 30°
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.