Features and Functions 3
Keysight 33210A User’s Guide 81
Sync Output Signal
A sync output is provided on the front-panel Sync connector. All of the standard
output functions (except noise and dc) 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 used with the
sweep mode (see page 109). Therefore, when
the marker 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 pint
is output.
–For internally-modulated AM, FM, and PWM, 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, FM, and PWM, 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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