HP 54540 Series - Page 52

Vertical
ECL Softkey
ECL Softkey
The ECL softkey sets the oscilloscope to levels optimized for ECL circuits:
e V/Div 200 mV/div (400 mV/div if the number of screens is 2, and 800
mV/div if the number of screens is 4)
© Offset -1.3V
e Coupling de
e Trigger level -1.3V
e Trigger slope No change
Recall 0 returns the menu to the previous settings.
TTL Softkey
The TTL softkey sets the oscilloscope to levels optimized for TTL circuits:
e V/Div 1 V/div (2 V/div if number of screens is 2, and 4 V/div if number
screens is 4)
e Offset 2.5V
e Coupling dc
e Trigger level 1.4V
® Trigger slope No change
Recall 0 returns the menu to the previous settings.
More Softkey
The more softkey returns you to the vertical menu.