YOKOGAWA FG420, Руководство пользователя

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120 IM FG410-01EN
4. BASIC OPERATION
When [BrstSync] is selected
A TTL level signal synchronized with the gate 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. Note that this differs from the gate signal.
When the signal during burst is observed with an oscilloscope, it can be used as the trigger signal
for the oscilloscope.
Gate on Gate off
Gate signal
Burst sync signal
Output signal
Gate on Gate off
Oscillation Stop Oscillation Stop
i) To execute oscillation in half-cycle units →Set oscillation stop unit to half cycle
To stop oscillation in half-cycle units, set [OscStop] (oscillation stop unit) on the 2nd page of the
setting screen to [HalfCycle] (half cycle). Normally [Cycle] (1 cycle) is set. When [Cycle] (1 cycle) is
set, oscillation is done in integer cycles.
The next figure compares oscillation done using 1 cycle and half cycle as the oscillation stop unit,
under the following conditions: oscillation start/stop phase = 30°, stop level = off.
In the case of 1-cycle units, following gate off, oscillation stops once the oscillation start/stop phase is
reached.
In the case of the half-cycle unit, following gate off, the oscillation stops once the oscillation start/
stop phase or [oscillation start/stop phase + 180° (or - 180°)] is reached, and then the oscillation start/
stop phase is transited to.
Gate on Gate off Gate on Gate off
Gate signal
Oscillation in
1-cycle units
Oscillation in
half-cycle units
Oscillation start/stop
phase: 30°
Oscillation
stop at 210°
j) 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.
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