RIGOL MSO/DS1000Z Series - Manual (Page 60)

RIGOL
12 MSO1000Z/DS1000Z Quick Guide
Logic Analyzer
Press this key to open the logic analyzer control menu. You can
turn on or off any channel or channel group, modify the display
size of the digital channel, modify the logic threshold of the
digital channel as well as group the 16 digital channels. You
can also set a label for each digital channel.
Note:
― This function is only applicable to MSO1000Z and DS1000Z Plus with the MSO
upgrade option.
― Press LA  D7-D0; when "On" is selected, CH4 function is automatically
disabled; when "Off" is selected, CH4 function recovers automatically. Press LA
 D15-D8; when "On" is selected, CH3 function is automatically disabled;
when "Off" is selected, CH3 function recovers automatically.
Signal Source
Press this key to enter the source setting interface. You can
enable or disable the output of the [Source1] or [Source2]
connector at the rear panel, set the output signal waveform
and parameters, turn on or off the state display of the current
signal.
Note: This function is only applicable to digital oscilloscopes with source channels.