YOKOGAWA FG420, Руководство пользователя

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96 IM FG410-01EN
4. BASIC OPERATION
p) To output the sweep stop value →[StpState] soft key
Press the [StpState] soft key to set the sweep stop value output state.
The status of the equipment under test at the sweep stop value can be checked.
The [StpState] soft key is always displayed in the sweep mode. If the [StpState] soft key is not
displayed, press the [▼2/2] soft key on the right end to switch the soft key sets.
In the case of gated single-shot sweep, the state is the stop value oscillation state results. To stop the
oscillation, press the [Stop] soft key.
q) To output sweep sync signal, sweep marker signal, sweep X drive signal →Sync
output setting
This setting is done with [SyncOut] (sync output) on the 3rd page of the setting screen. One of the
following four settings can be chosen.
• Signal synchronized with reference phase of the waveform [Sync]
• Signal synchronized with sweep [SwpSync]
• Signal combining marker signal with signal synchronized with sweep [Mkr]
• X drive signal of sweep [X-Drive]
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 [SwpSync] is selected
A TTL level signal synchronized with sweep is output from the sync/sub-output terminal. This
signal changes from high to low at sweep start.
When the signal being swept is observed with an oscilloscope, it can be used as the trigger signal
for the oscilloscope.
When [Mkr] is selected
The leading edge of the sweep sync output is used as the marker signal. During the interval from
the sweep start value to the marker value, the sweep sync output is low. The sweep sync output
does not change over the shuttle sweep course.
It is possible to know the timing at which the signal during sweep execution passes the marker
value.
Note that the time width when the sweep sync output is low is limited as follows.
• The time width is limited to about 0.05% to 99.95% of the sweep time. Therefore, when the
marker value is close to the start value or the stop value, the time width will not change even if
the marker value is changed.
• The resolution of the time width is limited to either 1/32,768 of the sweep time or 8.33 ns,
whichever is longer. Therefore, even if the marker value is changed finely, the time width may
not always change.
When [X-Drive] is selected
A signal of 0 to +3 V/open corresponding to the sweep value is output from the sync/sub-output
terminal. The voltage changes linearly proportionally to the elapsed sweep time. Even if [Log-
OneWay] or [Log-Shuttle] is selected as the log for the sweep function during frequency sweep,
the voltage changes linearly proportionally to the elapsed sweep time.
When the signal during sweep execution is observed with an X-Y display oscilloscope or X-Y
recorder, it can be used as the X-axis signal.