De-activating a 
channel 
To de-activate the channel, press the Channel key 
twice (once if the channel menu is already 
selected). 
Using Autoset 
 
Background 
The Autoset function automatically configures the 
panel settings to the best viewing conditions, in the 
following way. 
  Selecting the horizontal scale 
  Positioning the waveform horizontally 
  Selecting the vertical scale 
  Positioning the waveform vertically 
  Selecting the trigger source channel 
  Activating the channels 
Procedure 
1.  Connect the input signal to 
the oscilloscope and press 
the Autoset key. 
Autoset
 
 
2.  The waveform appears in the center of the 
display. 
    GDS-1000A Series User Manual 
42 
Undo option
Before Autoset After Autoset
Undoing the 
Autoset 
To undo the Autoset, press 
Undo (available for a few 
seconds). 
 
Adjusting the 
trigger level 
If the waveform is still 
unstable, try adjusting the 
trigger level up or down by 
using the Trigger Level knob. 
LEVE L
 
Limitation 
Autoset does not work in the following situation. 
  Input signal frequency less than 20Hz 
  Input signal amplitude less than 30mV 
Running and stopping the trigger 
 
Background 
In the trigger Run mode, the oscilloscope 
constantly searches for a trigger condition and 
updates the signal into the display when the 
condition is met. 
In the trigger Stop mode, the oscilloscope stops 
triggering and thus the last acquired waveforms 
stay in the display. The trigger icon at the top of 
the display changes into Stop mode. 
 
 
Pressing the Trigger Run/Stop key 
switches between the Run and Stop 
mode. 
Run/Stop