YOKOGAWA FG400, User Manual

Page: 132 / 171

120
4.
BASIC OPERATION
IM FG410-01EN
cycle) normally.
)
p. 121
A trigger is required for triggered gate oscillation. Refer to the following item.
f) Trigger settings for triggered gate oscillation
The trigger can be selected from internal trigger oscillator, external signal, manual trigger
key manipulation, and remote trigger manipulation.
Upon receipt of a trigger, the TRIG’D lamp next to the MAN TRIG key lights.
The trigger source is set with [Trig] (trigger) on the 2nd page of the setting screen. The
trigger delay is fixed to minimum.
■ Trigger source setting
The trigger source can be chosen from [Int] (internal) and [Ext] (external).
When the trigger source is [Int] (internal), the trigger period can be set.
When the trigger source is [Ext] (external), the trigger polarity can be set.
If the trigger source is set to [Ext] (external), a TTL level trigger signal is input to the
external trigger input terminal (TRIG IN).
■
Usage of manual trigger and remote trigger
Manual trigger manipulation and remote trigger manipulation are always valid regardless
of the trigger source setting.
The MAN TRIG key can be used for manual trigger manipulation.
However, in the case of the FG420, the MAN TRIG key works for the channel whose display
is active.
For details on the channel whose display is active,
)
p. 38.
To use only manual trigger manipulation and remote trigger manipulation as the trigger,
set the trigger source to [Ext] (external). Also, to prevent malfunction due to external noise
at this time, it is recommended to set the polarity to [Off].
g) To start triggered gate oscillation → Trigger
Oscillation is executed upon reception of a trigger if the internal gate signal is on.
The trigger can be selected from internal trigger oscillator, external signal, manual trigger
manipulation, and remote trigger manipulation.
h) To output the burst sync signal
→
Sync output setting
This setting is done with [SyncOut] (sync output) on the 2nd page of the setting screen. One
of the following two settings can be selected.
・
Signal synchronized with the reference phase of the waveform [Sync]
・
Signal synchronized with burst oscillation [BrstSync]
■
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 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
MAN TRIG