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Appendix D: Factory Initialization Settings
TDS 620A, 640A & 644A User Manual
AĆ25
TableĂAĆ5:ăFactory Initialization Defaults (Cont.)
Control Changed by Factory Init to
Edge trigger coupling DC
Edge trigger level 0.0 V
Edge trigger slope Rising
Edge trigger source Channel 1
GPIB parameters No change
Hardcopy Format
Layout
Palette
Port
Unchanged
Unchanged
Unchanged
Unchanged
Horizontal - delay trigger position 50%
Horizontal - delay time/division 50 ms
Horizontal - fit to screen Off
Horizontal - main trigger position 50%
Horizontal - position 50%
Horizontal - record length 500 points (10 divs)
Horizontal - main time/division 500 ms
Horizontal - time base Main only
Limit template ±V Limit
±H Limit
40 mdiv
40 mdiv
Limit template destination Ref1
Limit template source Ch1
Limit test sources Ch1 compared to Ref1; all others
compared to none.
Limit Testing Off
Limit Testing - hardcopy if condition
met
Off
Limit Testing - ring bell if condition
met
Off
Logic pattern trigger Ch4 (Ax2) input X (don't care)
Logic state trigger Ch4 (Ax2) input Rising edge
Logic trigger input
(pattern and state)
Channel1=H(high),
Channels2&3(Ax1) = X (don't
care)