A Short Tutorial on CMU Operation  CMU 
1100.4903.12 2.2  E-9 
How to access and close menus 
 
 
A startup menu is displayed automatically when the CMU is switched 
on. 
 
 
 
SETUP
 
 
 
Some general configuration and selection menus can be opened via 
the MENU SELECT, RESET, INFO, PRINT, HELP or SETUP keys on 
the front panel. 
 
 
 
 
 
The hotkeys displayed across the bottom of a main menu or graphical 
measurement menu are used to switch over between different main 
menus or graphical measurement menus. Tabs in popup menus are 
also accessible via hotkeys. 
 
 
 
In firmware versions <V3.05, the Group Config. softkey (always at the 
top left) is available in all measurement menus. This softkey opens a 
popup menu defining the input path and the trigger settings for the cur-
rent function group and signalling state.  
The Group Config. softkey is omitted in firmware V3.05 and later. In-
stead, the settings are available in the Connection Control menu, see 
below. 
 
 
 
 
The Connect. Control softkey (always at the top right) is available in all 
measurement menus. This softkey opens a popup menu defining the 
input and output connectors, the external attenuation, the reference 
frequency as well as many network-specific settings.  
In the Signalling test modes of many network options, the Connection 
Control menu is also used to set up and terminate a connection be-
tween the CMU and the DUT.  
In firmware versions V3.05 and later, the Connection Control menu 
also contains the input path and the trigger settings for the current func-
tion group and signalling state.  
 
 
 
 
If a special configuration menu exists for a measurement or for a gen-
erator the corresponding softkey is marked with a yellow arrow. The 
configuration menu is opened by pressing the softkey twice. 
 
ESCAPE
 
All CMU popup menus can be closed with the ESCAPE key.  
Main menus and graphical measurement menus are closed on switch-
ing to another main or graphical measurement menu.