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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 applications where you may not want to output the Sync
signal, you can disable the Sync connector. The Sync signal may be
derived from either output channel in a two-channel instrument.
• By default the Sync signal is derived from Channel 1.
• 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
used with the sweep mode (see page 148). Therefore, when
the marker
is enabled (and the sweep mode is also enabled
), the Sync signal
setting is ignored.
• For sine, pulse, ramp, square, and triangle waveforms, the Sync
signal is a square waveform with a 50% duty cycle. The Sync signal is
“high” in the first half of the cycle and “low” in the last half. The Sync
signal’s voltage levels are TTL-compatible when its load impedance is
more than 1 k.
• For arbitrary waveforms, the Sync signal is a Marker pulse with a
rising edge at the beginning of the ARB waveform, and a falling edge
at the point number selected as Marker. The Sync signal is a TTL
“high” when the first downloaded waveform point is output. This
default behavior may be overridden by using the MARKer:POINt
command which specifies a certain point within the arbitrary
waveform at which the Sync signal will transition to “low”.
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