User`s guide

Chapter 2 Front Panel Operations RIGOL
DSG3000 User’s Guide 2-7
ALC
Set the working state of the ALC function.
ALC is the automatic level control function. This function compares the actual output
amplitude with the set amplitude and adjusts the output amplitude according to the
comparison result to ensure the accuracy of the output amplitude.
Press LEVEL and use the menu page up/down key
to open the 2/2 menu page.
Press ALC to select “Off”, “On” or “Auto”.
 Off: turn off the ALC function.
 On: turn on the ALC function and the ALC label is displayed in the amplitude
area in the user interface.
 Auto: turn on or off the function automatically according to the current state of
the instrument and the ALC label is displayed in the amplitude area in the user
interface.
Hold Mode
Set the hold mode of RF output amplitude.
When ALC is disabled, the instrument switches to “Sample & Hold” state. At this
point, the RF signal generator samples and holds the amplitude setting values with
ALC turned on. This allows the generator to maintain a constant output level.
Press LEVEL  S&H Mode to select “Manul” or “Auto”.
 Manul: in this mode, the instrument performs a sample and hold operation each
time S&H is pressed.
 Auto: the default mode. In this mode, the instrument performs a sample and
hold operation each time the RF amplitude is set. In addition, you can also press
S&H to perform an operation.
NOTE: The above-mentioned menus are valid only when ALC function is “off”.
Flatness Calibration
The flatness calibration function can adjust RF output amplitudes corresponding to
the frequency points within the frequency range of the instrument to compensate for
the external loss caused by cabling, switches or other devices. You can create the
flatness calibration list and store the calibration list in internal or external memory.
You can also recall the stored calibration list when required.