Rigol DG800 Series, User Manual

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RIGOL Chapter 2 Front Panel Operations
2-82 DG800 User's Guide
Note: When the waveform is inverted, the sync signal related to the waveform
is not inverted. To set the invert of the sync signal, tap SyncSet

Polarity to
select "Negative".
3. Output Impedance
The output impedance setting affects the output amplitude and DC offset. The
instrument has a 50 Ω fixed serial output impedance for the front-panel [CH1]
connector. If the actual load is different from the specified value, then the
displayed voltage level will not match the voltage level of the components under
test. To ensure a correct voltage level, ensure that the load impedance setting
must match the actual load.
In the channel setting interface, tap the OutputSet menu label, and then tap
the HighZ parameter selection field to select "On" or "Off". The default is "On".
When "Off", tap the Impedance menu label, and input the desired value by
using the numeric keypad. You can also use the arrow keys and the knob to set
the impedance. The default is 50 Ω, and the range is from 1 Ω to 10 kΩ.
Impedance setting will be displayed on the screen.
The generator will adjust the output amplitude and offset voltage automatically
once the impedance setting is modified. For example, the current amplitude is 5
Vpp. At this point, modify the output impedance from "50Ω" to "HighZ". Then,
the amplitude value displayed on the screen will be doubled to 10 Vpp. If the
output impedance is modified from "HighZ" to "50Ω", the amplitude value will be
reduced to half of the previous value (i.g. 2.5 Vpp). Note that only the displayed
values change with the parameter and the actual output from the generator
does not change.
4. Level Limit
Enables or disables the level limit function.
In the channel setting interface, tap the OutputSet menu label, and then tap
the Level Limit parameter selection field to select "On" or "Off". By default, it is
set to "Off". When "On", the set high level and low level values will be limited
within the range of the "HighL Limit" and "LowL Limit".
Tap HighL Limit and LowL Limit respectively, and then use the numeric
keypad to set the desired high level limit and low level limit. The settable ranges
of the high level limit and low level limit are determined by the currently set
amplitude and offset values.