Philips PM3320 Operating Manual page 40

4-20E
l¥ 50 Ohmis on and an input voltage higher than 25 V dc andacr-m.s. is applied to the input
socket; 50 Ohm input impedance will not be switched off and the message
OVERLOAD ON CHANNEL A: reduce signal to prevent damages.
FER III ISI TI II III IRI IE II I III II II REI RT IR.
is displayed.
IMPORTANT: Remove the input voltage or decrease the input voltage immediately
to <5 V de and ac r.m.s.!
4 OFFSET> (channel A)
!f OFFSET is selected the VERTICAL/OFFSET A menu is displayed
and an offset (vertical shift before attenuator) value can be selected.
| OFFSET is only effective if DC input coupling is selected.
VERTICAL it OFFSET is selected and AC coupling is active, a message
OFFSET A
AUTO 4 OFFSET only possible if channel is DC- coupled.
2 AC is switched to DC.
ZERO Cs ;| is displayed and the input coupling is automatically switched to DC.
ENTER > 4 :
+ omy
pom
uP 52}
DOWN s
SCREEN DIV 7
RETURN 8
4 1 AUTO
With softkey AUTO, the offset value is set to such a level, that the mid—value of the
input signal is shified as much as possible to mid-memory.
A message
* * * AUTO OFFSET FOR CHANNEL A * * *
ee es
is displayed.
The new offset value is displayed in the softkey text area. The VERTICAL SHIFT is
set to zero.
A message
AUTO OFFSET error : signal offset out of range.
is displayed ii the input signal is exceeding the offset contro! range. In this case the
original offset value is restored.
4 2 =
4 3 ZERO
With softkey ZERO, the offset value is set to zero.