YOKOGAWA FG420, Руководство пользователя

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119 IM FG410-01EN
f) Trigger (gate) settings for gate oscillation
The trigger (gate) can be selected from internal trigger oscillator, external signal, manual trigger key
manipulation, and remote trigger manipulation.
While the gate signal is on, 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. At this time, the gate
signal is a square wave with 50% duty.
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
MAN TRIG key can be used for manual trigger manipulation.
The gate signal is on while the MAN TRIG key is pressed. 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.42 .
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 gate oscillation →Trigger (gate signal)
Oscillation is executed upon reception of gate signal 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.
4.9 Burst Setting and Manipulation