RIGOL DG5000 Series - Manual (Page 154)

RIGOL Chapter 10 Advanced Operation
User’s Guide for DG5000 10-4
 For AM, FM, PM, PWM and IQ, in internal modulation mode, the sync signal is
a Square with 50% duty cycle and takes modulating frequency as reference.
It is TTL high level in the first half period of the modulation waveform. In
external mode, the sync signal is a Square with 50% duty cycle and takes the
carrier waveform as reference. If the carrier waveform is arbitrary waveform,
the duty cycle of the sync signal is variable.
 For ASK, FSK and PSK, the sync signal takes ASK/FSK/PSK frequency as
reference and is a Square with 50% duty cycle.
 When Frequency Hopping is enabled, the sync signal, taking FH interval as
reference, is a Square with 50% duty cycle.
 For Sweep, when the “Mark” is disabled, the sync signal is a Square with
50% duty cycle, which is TTL high level at the beginning of the sweep and
changes to TTL low level at mid-point of the Sweep, whose frequency is
corresponding to specified sweep time, start hold and stop hold times; when
the “Mark” is enabled, the sync signal is TTL high level when sweep starts
and transforms to TTL low level at marked frequency point.
 For a N cycle burst, the sync signal is TTL high level when burst starts and
transforms to TTL low level while the specified cycle number ends (if the
waveform has a relative start phase, the crossing point may not be zero). For
an infinite burst, its sync signal is the same as the sync signal of a continuous
waveform.
 For an external Gated burst, its sync signal follows its gated signal, which will
transform to TTL low level until the last period is finished (if the waveform
has a relative start phase, the crossing point may not be zero).