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Horizontal Control
Reference
3Ć68
You also can select Delayed Runs After Main or Delayed Triggerable.For
more information on how to use these two menu items, see Delayed TriggerĆ
ing on page 3Ć20.
Trigger Position
To define how much of the record will be pretrigger and how much posttrigĆ
ger information using the Trigger Position menu item:
Press HORIZONTAL MENU ➞ Trigger Position (main) ➞ Set to 20%, Set
to 50%,orSet to 80% (side), or use the general purpose knob or the keyĆ
pad to change the value.
Record Length and Fit To Screen
To set the waveform record length, press HORIZONTAL MENU ➞ Record
Length (main). The side menu lists various discrete record length choices.
To fit an acquired waveform to the visible screen, regardless of record
length, press HORIZONTAL MENU ➞ Record Length (main). Then toggle
Fit to Screen to ON from the side menu. This provides similar functionality
to being in zoom mode and changing the time/division until the waveform
fits the screen. To turn off this feature, toggle Fit to Screen to OFF.
Horizontal Scale
To change the horizontal scale (time per division) numerically in the menu
instead of using the Horizontal SCALE knob:
Press HORIZONTAL MENU ➞ Horiz Scale (main) ➞ Main Scale or
Delayed Scale (side), and use the keypad or the general purpose knob to
change the scale values.
Horizontal Position
You can set the horizontal position to specific values in the menu instead of
using the Horizontal POSITION knob.
Press HORIZONTAL MENU ➞ Horiz Pos (main) ➞ Set to 10%, Set to 50%
or Set to 90% (side) to choose how much of the waveform will be displayed
to the left of the display center.
You can also control whether changing the horizontal position setting affects
all displayed waveforms, just the live waveforms, or only the selected waveĆ
form. The Horizontal Lock setting in the Zoom menu determines which
waveforms the horizontal position knob adjusts whether zoom is on or not.
Specifically, it acts as follows:
H None Ċ only the waveform currently selected can be zoomed and
positioned horizontally
H Live Ċ all channels (including AUX channels for the TDS 620A) can be
zoomed and positioned horizontally at the same time