YOKOGAWA FG420, Руководство пользователя

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78 IM FG410-01EN
4. BASIC OPERATION
i) To output modulation sync signal, modulation waveform signal →Sync output setting
Perform the sync output setting with [SyncOut] (sync output) on the 2nd page of the setting screen.
The sync output setting can be chosen from the following three.
• Signal synchronized with reference phase of waveform [Sync]
• Signal synchronized with internal modulation waveform [ModSync]
• Internal modulation waveform [ModFctn]
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 [ModSync] is selected
A TTL level signal synchronized with the internal modulation waveform is output from the sync/
sub-output terminal. This is a 50% duty square wave that rises at the zero phase position of the
internal modulation waveform. If the internal modulation waveform is noise, it is fixed to low
level.
When the signal being modulated is observed with an oscilloscope, it can be used as the trigger
signal for the oscilloscope.
When [ModFctn] is selected
The internal modulation waveform is output from the sync/sub-output terminal. The signal level
is ±3 V/open.
[ModFctn] cannot be selected when the modulation type is FSK or PSK.