Philips PM3320 Operating Manual page 42

4-22E
4 5
4 6
4 rf
4 8
uP
Pushing softkey UP gives a more positive or less negative offset to the signal. The
amount depends on the attenuator setting and the setting SCREEN or DIV.
If DIV is selected (DIV intensified) one division is added to the existing offset after
each push of the UP softkey.
If SCREEN is selected (SCREEN intensified) a full screen of 10 divisions is added to
the existing offset after each push of the UP softkey.
The result is displayed in volts, but the voltage is recalculated from the number of
divisions.
For example: when 1.005 V is visible, it becomes 1.025 V, then 1.045 V etc. if the
attenuator has been set to 20 mV/div (200 mV for a full screen).
DOWN
Pushing softkey DOWN gives a less positive or more negative offset to the signal.
The amount depends on the attenuator setting and the setting SCREEN or Div.
if DIVis selected (DIV intensified) one division is subtracted from the existing offset
after each push of the DOWN softkey.
If SCREEN is selected (SCREEN intensified) a full screen of 10 divisions is
subtracted from the existing offset after each push of the DOWN soitkey.
The result is displayed in volts, but the voltage is recalculated from the number of
divisions.
For example: when 1.005 V is visible, it becomes 985 mV, then 965 mV etc. if the
attenuator has been set to 20 mV/div. (200 mV for a full screen).
SCREEN DIV
With this softkey, a selection can be made between an offset change in divisions or
in screens (10 divisions) when the softkeys UP or DOWN are operated.
Pushing this softkey changes the selection from SCREEN to DIV or réverse, The
active selection is displayed intensified.
RETURN
After pushing softkey RETURN, menu VERTICAL COUPLING A is
displayed again.
The selections as made before remain.
5 AC DC (channel B)
With this softkey a selection can be made between AC input coupling and DC input
coupling. Pushing this softkey changes the selection from AC to DC or reverse, the active
selection is displayed intensified.
If AC is selected, the offset becomes 0 Volt.
lf DC is selected, the previously selected offset value is active again.