QUICK REFERENCE 
39 
Built-in Help 
 
The Help key shows the contents of the built-in 
help support. When you press a function key, its 
descriptions appear in the display. 
Help
 
Applicable keys 
Acquire Display Utility Help
Run/Stop
Autoset
Cursor
Hardcopy
Measure
Save/Recall
Procedure 
1.  Press the Help key. The 
display changes to the Help 
mode. 
Help
 
 
2.  Press a functional key to 
access its help contents. 
(example: Acquire key) 
Acquire
 
 
3.  Use the Variable knob to 
scroll the Help contents up 
and down. 
VARIABL
    GDS-1000A Series User Manual 
40 
MEASUREMENT 
The Measurement chapter describes how to 
properly observe a signal using the oscilloscope’s 
basic functions, and how to observe a signal in a 
detailed manner using some of the advanced 
functions such as : 
Automatic measurements, cursor measurements, 
and math operations.  
Basic Measurements 
This section describes the basic operations required in capturing and 
viewing an input signal. For more detailed operations, see the 
following chapters. 
  Measurements → from page40 
  Configurations → from page59 
Activating a channel 
 
Activating a 
channel 
To activate an input channel, 
press the Channel key, CH1 or 
CH2. The channel indicator 
appears at the left side of the 
display and the channel icon 
changes accordingly. 
CH 1
 or 
CH 2
 
(Continued on next page)