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Chapter 3 Features and Functions
Output Configuration
3
Sync Output Signal
A sync output is provided on the front-panel Sync connector. All of the
standard output functions (except dc and noise) have an associated Sync
signal. For certain applications where you may not want to output the
Sync signal, you can disable the Sync connector.
• By default, the Sync signal is routed to the Sync connector (enabled).
When the Sync signal is disabled, the output level on the Sync
connector is at a logic “low” level.
•
When a waveform is inverted (see “Waveform Polarity” on the previous
page), the Sync signal associated with the waveform is not inverted.
• The Sync signal setting is overridden by the setting of the Marker
frequency used with the sweep mode (see page 86). Therefore, when
the marker frequency is enabled (and the sweep mode is also enabled
),
the Sync signal setting is ignored.
•For sine, ramp, and pulse waveforms, the Sync signal is a square
waveform with a 50% duty cycle. The Sync signal is a TTL “high”
when the waveform’s output is positive, relative to zero volts (or the
dc offset value). The Sync signal is a TTL “low” when the output is
negative, relative to zero volts (or the dc offset value).
•For square waveforms, the Sync signal is a square waveform with the
same duty cycle as the main output. The Sync signal is a TTL “high”
when the waveform’s output is positive, relative to zero volts (or the
dc offset value). The Sync signal is a TTL “low” when the output is
negative, relative to zero volts (or the dc offset value).
•For arbitrary waveforms, the Sync signal is a square waveform with a
50% duty cycle. The Sync signal is a TTL “high” when the first
downloaded waveform point is output.
• For internally-modulated AM and FM, the Sync signal is referenced
to the modulating waveform (not the carrier) and is a square
waveform with a 50% duty cycle. The Sync signal is a TTL “high”
during the first half of the modulating waveform.
• For externally-modulated AM and FM, the Sync signal is referenced
to the carrier waveform (not the modulating waveform) and is a
square waveform with a 50% duty cycle.
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