Rigol DG811 - Sweep Trigger Source

RIGOL Chapter 2 Front Panel Operations
2-60 DG800 User's Guide
Ramp: 1 μHz to 1 MHz
Arb: 1 μHz to 10 MHz
 The range of the frequency span is affected by the center frequency.
Center frequency <
m
F
: the range of the frequency span is ±2× (center
frequency –
min
F
);
Center frequency ≥
m
F
: the range of the frequency span is ±2× (
max
F
-
center frequency).
Take sine as an example.
min
F
is 1 μHz,
max
F
is 35 MHz, and
m
F
is 17.5 MHz.
If the center frequency is 550 Hz, the frequency span range is ±2×(550 Hz–1 μHz) =
±1.099999998 kHz; if the center frequency is 20 MHz, the frequency span range is
±2×(35 MHz – 20 MHz) = ±30 MHz.
The generator will restart to sweep from the specified "start frequency" after the
"center frequency" or "frequency span" is modified.
Tip:
In large-scale sweep, the amplitude characteristic of the output signal might
change.
Sweep Trigger Source
The trigger sources of the sweep can be Internal, External, or Manual. When the
signal generator receives a trigger signal, a sweep output is generated, and then the
signal generator waits for another trigger signal. After the sweep function is enabled,
tap the Source to select "Internal", "External", or "Manual". The default is
"Internal".
1. Internal Trigger
The generator outputs continuous sweep waveforms when the internal trigger is
selected. The trigger period is determined by the specified sweep time, return
time, start hold, and stop hold time.
2. External Trigger
In the External trigger, the signal generator receives the trigger signal input from
the rear-panel [CH1/Sync/Ext Mod/Trig/FSK] connector. Once it receives a
TTL pulse with a specified polarity, a sweep is initiated. To specify the polarity of
the TTL pulse, tap the Trig In to select "RisEdge" or "FallEdge". By default, it is
"RisEdge".