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Theory of Operation
3-4
AWG710 Service Manual
Clock Oscillator. You can select either the internal or external reference clock
source by using the SETUP horizontal menu.
If you select the external source, the reference signal connected to the 10 MHz
REF In connector on the rear panel will be used.
The internal clock is from the reference clock oscillator, which uses direct digital
synthesis (DDS). Figure 3–2 shows the clock oscillator configuration.
Trigger Control. The Trigger Control block controls the Memory Address Control
in the operation mode that you specified from the RUN MODE menu.
Waveform Memory and Shift Register. The Waveform Memory block has 8 bits for
waveform data and 2 bits per channel for markers, thus a total length of 16 M /32
M (option 01) points. You can set any value from 960 points to 16 M/32 M
(option 01) points for the length of the waveform data. It must be in increments
of 4.
The Shift Register block provides waveform data from the DAC at a rate of up to
4.0 GS/s.
RUN modes. Selecting a RUN mode from the SETUP menu causes one of the
following modes to operate the AWG710 Arbitrary Waveform Generator. Table
3–1 lists the available run modes.
Table 3-1: Run modes
Modes Descriptions
Continuous Consecutively output regardless of existence of a trigger signal.
Triggered The output signal is obtained once only when one of the following is input:
H An external trigger signal from the TRIG IN connector on the rear panel.
H A trigger signal generated using the FORCE TRIGGER button on the front
panel.
H A trigger command from remote device.
H If the SEQUENCE has been defined, the TRIGGERED output is obtained
once only according to the definition.