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Appendix D: Factory Initialization Settings
TDS 620A, 640A, & 644A User Manual
Table A-7: Factory Initialization Defaults (Cont.)
Control Changed by Factory Init to
Display variable persistence 500 ms
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 s
Horizontal – FastFrame Off
Horizontal – FastFrame, frame count 2
Horizontal – FastFrame, frame length 500
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 s
Horizontal – time base Main only
Limit template Limit
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)