GDM-8261A User Manual 
16 
Measurement Keys (lower row) 
 
As the AUTO key, selects the 
measurement range automatically. 
As the Enter key, confirms the 
entered value. 
Selects the measurement update 
rate: Slow, Medium, or Fast (page 
25). 
Selects the parameter in various 
occasions: higher ( ) or lower 
( ). 
Activates the Hold function (page 
64). 
Activates the Compare 
measurement (page 65). 
Triggers sample acquisition 
manually (page 76). 
SHIFT → TRIG 
(Int/Ext Trigger) 
Selects the Internal or the External 
trigger source (page 76). 
Selects parameters in various menus: 
left ( ) or right ( ). 
Measures the Relative value (page 
62). 
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