15
Subject to change without notice
or would be invisible when being set above or below the
screen, the symbol changes and an arrow indicates in
which vertical direction the trigger point has left the screen.
The trigger point symbol is automatically switched off in
those modes where there is no direct relation between
the trigger signal and the displayed signal. The last setting
in undelayed time base mode is stored and still active if
triggered delay
(“dTr”)
time base mode is selected. This
allows for a different level setting for the triggered delay
(“dTr”)
time base mode.
STORAGE MODE ONLY
In storage mode the trigger point symbol also indicates
the pre or post trigger time by a horizontal position shift.
Please note “DEL. / TR. POS.” (21).
(12
)
X POS.
Control knob.
This control knob enables an X position shift of the signal(s)
in Yt and XY mode. In combination with X magnification
x10 (Yt mode) this function makes it possible to shift any
part of the signal on the screen.
STORAGE MODE ONLY
In XY mode the X-POS. knob is inoperative. The Y-POS/
CURS.I (6) knob must be used for X position shift.
(13) X-MAG
Pushbutton and x10 LED.
Each time this pushbutton is pressed the x10
x10
x10
x10
x10 LED located
above is switched on or off. If the x10 LED is lit, the signal
display is expanded 10 fold in all time deflection settings except:
1. Analog mode with a time deflection coefficient of 50ns/
div. in combination with X-MAG. x10 yields 10ns/div. (5
fold expansion).
2. Storage mode with 100ns/div. yields 20ns/div. (5 fold).
As the X expansion results in a higher time base speed
(lower time deflection coefficient), all time and frequency
relevant information in the readout is switched over.
After activating X MAG. x10, the visible part of the signal is
that which was previously at the graticule centre. The
interesting part of the signal can be made visible with aid
of the X POS.
.
.
.
.
(12)
control.
This pushbutton is not operative in XY mode.
(14) VOLTS/DIV
..... Control knob for channel I with a double function.
This control is active only if channel I is enabled and it‘s
input coupling (AC or DC) is activated. Channel I is active in
CH I (Mono), DUAL, Addition (“add”) and XY mode. The
knob is automatically disabled if the channel related to it is
switched off, or if the input coupling is set to GND (ground).
Y deflection coefficient setting (input attenuator):
This function is available if the VAR. LED is dark.
Turning the control knob clockwise increases the sensitivity
(decreases the deflection coefficient) in a 1-2-5 sequence
and decreases the sensitivity (increases the deflection
coefficient) if turned in the opposite direction (ccw.). The
available range is from 1mV/div up to 20V/div.
The deflection coefficients and additional information
regarding the active channel(s) are displayed in the readout,
e.g.
”Y1: deflection coefficient, input coupling”
. The ”:”
:”
:”
:”
:”
symbolizes calibrated measuring conditions and is replaced
by the ”
”
”
”
”
>
”
”
”
”
” symbol in uncalibrated conditions.
VAR.:
The vernier (variable) function is described under item VAR
(15).
(15) CH I VAR.
Pushbutton with two functions.
Pressing and holding this pushbutton selects the
VOLTS/
DIV.
(14)
control knob function between attenuator and
vernier (variable). The current setting is displayed by the
VAR-LED
located above the knob.
CH I mode:
Briefly pressing the CHI button sets the instrument to
channel I (
Mono CH I
) mode. The deflection coefficient
displayed in the readout indicates the current conditions
(”
Y1...
”
”
”
”
”). If neither external nor line (mains) triggering was
active, the internal trigger source automatically switches
over to channel I and the READOUT displays “Y1, trigger
slope, trigger coupling”. The last function setting of the
VOLTS/DIV (14)
knob remains unchanged.
All channel I related controls are active if the
input (25)
is
not set to
GND (26)
.
VAR.:
After switching the
VAR-LED (14)
on, the deflection
coefficient is still calibrated. Turning the
VOLTS/DIV. (14)
control knob counter clockwise reduces the signal height
and the deflection coefficient becomes uncalibrated.
The readout then displays e.g.
”Y1>...”
indicating the
uncalibrated condition instead of
”Y1:...”
. Pressing and
holding the CHI pushbutton again switches the LED off,
sets the deflection coefficient into calibrated condition
and activates the attenuator function. The previous vernier
setting will not be stored.
(16) DUAL MENU
Pushbutton with multiple functions.
As seen on the front panel, the DUAL-MENU (16)
pushbutton can be pressed together with the CHII (19)
pushbutton (INV). Information regarding “INV” can be f
ound under item 19.
1. Switchover on DUAL (two channel), ADDITION and
XY operation:
Briefly pressing selects DUAL mode if channel I (mono)
or channel II (mono) mode was present before, without
displaying a pulldown menu.
In DUAL mode the readout displays the deflection
coefficients of both channels. The display also indicates
the channel switching mode (alt or chp) on analog or the
signal display mode (rfr, rol etc) on store. The last used
trigger conditions (source, slope and coupling) remain
unchanged, but can be changed.
2. Choosing the channel switch over or sub menu:
Once DUAL mode is active, briefly pressing the (Dual)
pushbutton opens a pulldown menu with the current mode
highlighted. The menu depends on the actual operation:
2.1 Analog mode: “alt” (alternate DUAL mode), “add” (Addition
mode), “XY” (XY mode) and “chp” (chopped DUAL mode).
2.2 Storage mode: “dual” (DUAL mode), “add” (Addition
mode) and “XY” (XY mode).
Controls and readout
