17
Subject to change without notice
time or wait approx. 10 seconds without pressing either
pushbutton to leave that function.
Attention:
Make sure that the signal to be displayed is similar
to the one that was present when the settings were
stored. If the signal is dif ferent (frequency,
amplitude) to the one during storage then a
distorted display may result.
If the
SAVE
or the
RECALL
pushbutton was depressed
inadvertently, briefly press both pushbuttons at the same
time or wait approx. 10 seconds without pressing either
pushbutton to exit that function.
Switching the instrument off results in an automatic SAVE
procedure of the present settings in memory location 9
and overwrites the data in that location. If the instrument
settings in memory location 9 are of importance, RECALL
location 9 settings before switching the instrument off.
The setting controls and LED’s for the Y amplifiers,
modes, triggering and time base are located
underneath the sector of the front panel described
before.
(13) TRS
– Pushbutton and associated LED.
The instrument contains a trace separation function
which is required in the alternate time base mode to
separate the
B
time base trace from the
A
time base in
Y direction. Subsequently this function is only available
in alternate time base mode.
After the
TRS
pushbutton is pressed once the LED
related to that pushbutton is lit. Then the
Y-POS. I
control
knob is operative as vertical position control for the trace
of the
B
time base. The maximum position shift is approx.
+/-4 div. Without a change of the
Y-POS. I
controls the
trace separation function is switched off automatically
after approx. 10 seconds. The trace separation function
can also be left by pressing the
TRS
pushbutton.
(14) Y-POS. I
– Control knob with two functions.
The vertical trace position of channel I can be set with
this control knob. In
ADD
(addition) mode both (
Y-POS.
I
and
Y-POS. II
) control knobs are active. In
alternate
time base
mode, this control knob can be used to
separate the
B
time base trace from the
A
time base
trace.
Please note TRS (13)
.
If automatic triggering
(AT)
is present and the input is
set to
GD (34)
, the vertical trace position corresponds
with 0 Volt (reference) at the input and can be set to any
suitable position. In
ADD
mode these conditions apply
to both channels. After switching
GD
off and selecting
DC input coupling it is possible to determine the DC
content of a signal by comparing the actual Y position
with the previously determined 0 Volt Y position.
Y-POS. I Symbol
Provided that the readout is displayed and
”DC REFE-
RENCE = ON”
is selected in the
”SETUP”
submenu
”MISCELLANEOUS”
the 0 Volt reference position is
indicated by a ground (
⊥
⊥⊥
⊥⊥
) symbol. For channel I this
symbol is displayed on the left of the vertical (graticule)
center line, if the
Y-POS. I
trace position is set within
the screen. This allows you to determine the 0 Volt
reference position at any time.
Attention!
In XY mode the 0 Volt reference symbol is automati-
cally switched off.
STORAGE MODE ONLY
The
Y-POS. I
control knob can also be used for shifting
the position of a signal stored with
HOLD
in vertical
direction. Additional information relating to this operation
is described under
HOLD
(
7
).
(15) Y-POS. II
– Control knob with two functions.
The vertical trace position of channel II can be set with
this control knob. In
ADD
(addition) mode both (
Y-POS.
I
and
Y-POS. II
) control knobs are active. If the instrument
is set to analog
XY
mode this control knob is inactive
and the
X-POS
. knob must be used to shift trace
horizontally.
If automatic triggering
(AT)
is present and the input is
set to
GD (38)
, the vertical trace position corresponds
with 0 Volt (reference) at the input and can be set to any
suitable position. In
ADD
mode these conditions apply
to both channels. After switching
GD
off and selecting
DC input coupling it is possible to determine the DC
content of a signal by comparing the actual Y position
with the previously determined 0 Volt Y position.
Y-POS. II Symbol
Provided that the readout is displayed and
”DC REFE-
RENCE = ON”
is selected in the
”SETUP”
submenu
”MISCELLANEOUS”
the 0 Volt reference position is
indicated by a ground (
⊥
⊥⊥
⊥⊥
) symbol. For channel II this
symbol is displayed on the right of the vertical (graticule)
center line, if the
Y-POS. II
trace position is set within
the screen. This allows you to determine the 0 Volt
reference position at any time.
Attention!
In XY mode the 0 Volt reference symbol is automa-
tically switched off.
STORAGE MODE ONLY
In contrast to analog mode the
Y-POS. II
knob must be
used for
X position shift
in storage
XY
mode and the
X-POS.
knob is disabled. The
Y-POS. II
control knob
can also be used for shifting the position of a signal
stored with
HOLD
. Additional information relating to this
operation is described under
HOLD
(
7
).
(16) NM - AT -
(SLOPE)
- Pushbutton with a double
function and associated
NM-LED
.
The following description assumes that
Yt
(time base)
mode has been chosen.
Controls and Readout
A
