Philips PM3320 Operating Manual page 33

4-13E
Continuously variable conirol giving vertical input shift of the trace of
the relevant channel.
This shift is introduced behind the attenuator but before the memory.
The adjusting speed increases after turning continuously in one
direction. After stopping, starting in the reverse direction resumes
with a slow adjusting speed.
BNC input socket for the channel with probe indication detector.
BNC output socket for a square-wave calibration signal with an
amplitude of 1 Vp-p and a frequency of 2 kHz.
The output voltage is reduced by a half when the outputis terminated
in 50 ohm.
When the output is short-circuited, the output current is 20 mA p-p
(reduced by a half when terminated in 50 ohm).
The zero line of the square-wave signal is on the base-line level.
If pushbutton MODE is pushed, the VERTICAL MODE menu is
dispiayed. See 4.2.5.1.
lf pushbutton COUPLING is pushed, the VERTICAL COUPLING menu
is displayed. See 4.2.5.2.