Specifications

21
Subject to change without notice
Trigger System
you to adjust the trigger such that rst condition „A“ must be met
and then another condition „B“ before the trigger will respond
(refer to Fig. 6.3).
E.g. it is possible to dene a source (channel) and a level of
120 mV on the rising slope of that signal and for the second
condition a level of 80 mV on the falling slope. Additionally, it is
possible to dene whether the B event should occur a time (min.
8 ns) or a number (min. 1) of times after the A event. The level or
time or the number of events can be entered numerically with
the universal knob or in a submenu. In order to do this rst select
the setting, then push the soft key next to . In
the window which will open, you can enter numbers and units
with the combination of universal knob, the CURSOR SELECT
key and the visible softmenu functions.
6.4 Pulsetrigger
The pulse trigger allows you to trigger on nite pulse widths of
positive or negative pulses, or ranges thereof. Select the pulse
trigger by pushing the key TYPE and the respective soft key
next to PULSE. Further settings are available in the soft menu
after pushing FILTER.
There are 6 options:
ti ≠ t: The pulse width ti is unequal to the reference width t.
ti = t: The pulse width ti is equal to the reference width t.
ti < t: The pulse width ti is smaller than the reference width t.
ti > t: The pulse width ti is greater than the reference width t.
t
1
<ti<t
2
: The pulse width ti, is smaller than the reference width
t
2
and greater than the reference width t
1
.
not(t
1
<ti<t
2
): The pulse width ti, is greater than the reference
width t
2
and smaller than the reference width t
1
.
First select the desired option and then adjust the desired re-
ference time. If you choose „ti ≠ t“ od „ti = t“, you can select the
reference time after pushing the soft key next to TIME by turning
the universal knob. If you choose the soft menu item DEVIATION
the universal knob is used to dene a tolerance interval. If you
chose ti < t or ti > t, you can only dene one limit. Both options
with two references (t
1
and t
2
) can be set due to pressing the re-
spective soft key and turning the universal knob. All these settings
can be combined with positive or negative pulses by selecting
the respective soft menu keys. With positive pulses the width is
dened from the rising to the falling slopes, with negative pulses
from the falling to the rising slopes. Triggering will then be on the
second slope of the pulse.
Fig. 6.4: Pulse trigger menu
Fig. 6.5: Video trigger menu
6.5 Videotrigger
The video trigger allows you to trigger on PAL or NTSC standard
video signals. Select this mode by pushing the key TYPE in the
trigger control section of the front panel. The source is again
selected after pushing the key SOURCE. In the menu which
opens after pushing the key FILTER all further settings may
be performed.
First select the video standard PAL or NTSC by pushing the
respective soft key. As usual the selection will be indicated by
a blue background in the menu. The second setting will apply
to the polarity of the sync pulses. Next either the mode LINE
or FRAME can be selected. If LINE was selected, the precise
number of a desired line can be selected with the universal knob
from the 8th to the 623rd; this will be activated by pushing the
soft key next to the line number. The two other menu items allow
fast selections: LINE MIN sets the trigger line to the minimum
value, ALL LINES will cause triggering on any line. If FRAME
was chosen, the lower menu items will allow to trigger on ALL,
only the ODD or only the EVEN half frames.